For feed millers and equine supplement formulators, magnesium oxide for horses is far more than another mineral ingredient—it is the foundation of calm, focused performance and metabolic health in modern equine diets. As the most concentrated and cost-effective magnesium source available, magnesium oxide (MgO) is the go-to choice for addressing magnesium deficiencies that manifest as nervousness, muscle tremors, and compromised hoof integrity. However, not all MgO is created equal. This article delves into the specifications, sourcing strategies, and comparative science that procurement managers and nutritionists must evaluate when purchasing feed-grade magnesium oxide for horses in bulk.
Magnesium is a macro mineral essential for over 300 enzymatic reactions, including nerve impulse transmission, muscle contraction, and energy metabolism. Lush spring grasses, high-grain diets, and the stress of training can all create subclinical magnesium deficiencies in horses. Common signs range from spookiness and irritability to chronic tying-up and insulin resistance. Because typical forage often fails to meet the elevated demands of performance or breeding stock, feed manufacturers routinely add magnesium oxide to horse feed to achieve the recommended 15-20 mg of elemental magnesium per kg of body weight per day. For a 500 kg horse, that equates to approximately 7.5–10 grams of elemental magnesium daily, often supplied as 12–17 grams of magnesium oxide depending on purity. This steady demand makes bulk sourcing of consistent, high-assay MgO a critical supply chain imperative.
Among the multitude of magnesium salts used in animal nutrition, magnesium oxide in feed stands out for its unparalleled elemental magnesium density. With a theoretical magnesium content of 60.3%, a 98% pure magnesium oxide delivers roughly 58–59% elemental magnesium. By contrast, magnesium citrate provides only 11–16% elemental magnesium, and magnesium sulfate (Epsom salt) merely 10%. This density allows feed formulators to incorporate less bulk, preserving space in concentrated supplements and reducing the impact on palatability.
A common query in equine nutrition circles is “is magnesium oxide magnesium?” The straight answer is no—magnesium oxide is a compound consisting of one magnesium atom bonded to one oxygen atom (MgO). However, nutrition labels and feed specifications almost exclusively refer to the elemental magnesium content delivered by the oxide. Therefore, when a supplement guarantees 15 g of magnesium per serving, it may be delivering approximately 26 g of magnesium oxide to achieve that claim. For procurement, this distinction is vital: always confirm whether a supplier’s assay refers to MgO percentage or elemental Mg percentage. Hailei Chemical’s feed-grade MgO specifies both, typically providing ≥98% MgO on an ignited basis, yielding ≥58% elemental magnesium—ensuring feed mills achieve label claims without costly overages.
The debate magnesium oxide versus magnesium hydroxide often surfaces when evaluating oral bioavailability and gastric tolerance in horses. Magnesium hydroxide [Mg(OH)₂] is widely used as an antacid and laxative in human medicine, and some equine product developers consider it as a magnesium source. However, a direct comparison reveals critical differences:
For feed manufacturers weighing the MgO vs. Mg(OH)₂ choice, the higher concentration, predictable reactivity, and lower irritation risk of light-burned magnesium oxide make it the default ingredient for most pelleted, extruded, and textured horse feeds.
When procuring magnesium oxide in feed, quality and consistency dictate animal performance, label accuracy, and regulatory compliance. Feed-grade MgO should meet or exceed the following typical specifications (as verified by Certificate of Analysis):
Equine supplement manufacturers must differentiate between light-burned (caustic calcined) and dead-burned (sintered) magnesium oxide. Dead-burned MgO, used almost exclusively for refractory bricks, has extremely low reactivity and poor bioavailability—it is entirely unsuitable for animal nutrition. Hailei Chemical’s feed-grade product is a high-activity light-burned magnesium oxide, carefully calcined to optimize solubility without compromising safety. We encourage buyers to request a pre-shipment sample and full assay before confirming a bulk order; visit our Magnesium Oxide product page for standard specification sheets.
For feed millers blending 5,000 tonnes or more of horse feed annually, buying magnesium oxide in bulk bags (500–1,000 kg) or by the container load (20–25 metric tons) delivers significant cost advantages. The spot price for feed-grade MgO can fluctuate based on raw magnesite availability and energy costs for calcination. By establishing a long-term contract with a reliable Chinese producer like Hailei Fine Chemical, buyers can lock in pricing, secure consistent quality, and minimize logistics disruptions. Our bulk packaging options—including 25 kg multi-wall paper bags, 1,000 kg FIBCs, or custom-labeled private label bags—integrate seamlessly into mill receiving systems. Further, consolidating shipments with other mineral additives such as dicalcium phosphate or sodium bentonite can optimize freight. For a detailed cost analysis and current FOB rates, we invite you to request a quotation here.
Despite its prevalence in equine nutrition, magnesium oxide is sometimes misunderstood by buyers influenced by human supplement marketing. Let’s clarify a few myths:
Educating your sales teams and end customers on these facts builds trust and positions your feed brand as a leader in equine wellness. We can provide technical bulletins and third-party trial summaries to support your marketing efforts.
Feed-grade magnesium oxide is hygroscopic. Even light-burned grades can absorb atmospheric moisture if stored improperly, leading to caking, reduced flowability, and potential pre-reaction with other ingredients. Best practices for storage include:
Hailei Fine Chemical packs MgO in moisture-resistant multi-wall liners and can supply vacuum-sealed bulk bags for sea freight, greatly extending shelf life up to 12 months from manufacture date. Our export documentation complies with all international feed additive regulations, including EU 1831/2003 and FDA GRAS notification, allowing smooth customs clearance in over 40 countries.
With over two decades of specialty chemical manufacturing experience, Weifang Hailei Fine Chemical Co., Ltd. produces magnesium oxide that consistently meets the stringent requirements of the global feed industry. Our ISO 9001:2015 certified facilities employ advanced low-temperature calcination kilns and multi-stage magnetic separation to guarantee ultra-low heavy metal profiles. We offer:
Whether you are developing a new calming supplement, a comprehensive hoof & coat balancer, or a complete pelleted ration for high-performance horses, source your MgO from a partner that understands both chemistry and equine physiology. Reach out today to discuss your specific magnesium oxide requirements; our specialists will respond within 24 hours with tailored recommendations and a competitive quotation.
Ready to secure a high-purity MgO supply for your equine feed lines? Click here to request your personalized quote or visit our magnesium oxide product page for full product data.
Procurement managers and chemical engineers often ask, what is magnesium oxide used for? The short answer: magnesium oxide (MgO) is a versatile inorganic mineral serving critical roles in refractories, animal nutrition, agriculture, and environmental protection. But behind that simple question lies a complex landscape of grades, purities, reactivities, and application-specific requirements. At Hailei Chemical, we supply both light-burned (caustic calcined) and dead-burned (sintered) magnesium oxide to industrial buyers worldwide. This article demystifies the uses of MgO and helps you select the optimal grade for your manufacturing or processing needs.
Magnesium oxide is produced by calcining naturally occurring magnesite (MgCO3) or by extracting magnesium from seawater or brine. The calcination temperature dictates the final product’s characteristics:
These two broad categories define the primary split between industrial uses—reactive chemistry versus high-temperature stability. A B2B buyer’s first task is to align their application with the right calcination range.
The largest volume consumer of magnesium oxide is the refractory industry, accounting for over 60% of global MgO demand. Dead-burned magnesia is a cornerstone material for basic refractories that line steelmaking furnaces, cement kilns, and non-ferrous metal processing units.
Refractory-grade dead-burned magnesia typically requires MgO content above 90%, often 94–98% purity, with controlled lime/silica ratios to achieve direct bonding. Brick manufacturers blend MgO with graphite or other additives to produce magnesia-carbon bricks for electric arc furnaces, magnesia-chrome bricks for copper smelters, and monolithic gunning mixes for ladle maintenance. If you buy magnesium oxide near me through local distributors, you may encounter limited grade options. Sourcing directly from specialized producers like Hailei Chemical ensures consistent lot-to-lot quality with complete traceability.
Magnesium oxide is a widely used macro-mineral supplement in animal diets. Its alkaline nature and high magnesium content (typically 50–56% elemental Mg depending on purity) make it an efficient and cost-effective way to prevent magnesium deficiency disorders.
Horse owners and feed millers frequently search for magnesium oxide supplement for horses or simply magnesium oxide for horses. MgO is the preferred source because it offers high bioavailability, excellent palatability, and no risk of over-acidification compared to sulfate forms. Benefits include:
For feed formulation, light-burned magnesium oxide in feed should be finely ground (typically 150–200 mesh) to ensure uniform mixing and optimal digestibility. Heavy metal levels (lead, arsenic, cadmium) must meet strict feed-grade specifications (e.g., EU 2002/32 or FDA 21 CFR). Hailei Chemical supplies feed-grade MgO with purity ≥94%, Mg content ≥54%, and comprehensive contaminant testing.
In dairy cattle, MgO is added to rations to prevent grass tetany, a potentially fatal condition caused by magnesium deficiency during spring grazing on lush pastures. Typical inclusion rates range from 15–30 g per cow per day. For swine, MgO contributes to bone strength and reduces stress-related aggression. Unlike some alternative magnesium sources, MgO remains stable during pelleting and does not degrade vitamins.
Magnesium is a central atom in chlorophyll, making it vital for photosynthesis. Many soils are magnesium-deficient, particularly acidic sandy soils and those with high potassium inputs. Magnesium oxide serves as a raw material for producing magnesium-containing fertilizers such as:
Direct soil application of fine-mesh MgO can also correct pH while supplying magnesium. However, the reactivity must be tailored: over-reactive grades can cause localized alkaline burns, while low-reactivity materials release magnesium too slowly. Fertilizer-grade MgO commonly has 85–92% purity with controlled reactivity measured by citric acid solubility or iodine adsorption number. Buyers should specify these parameters when requesting a quote.
Magnesium oxide plays a green role in air and water purification. Power plants and industrial boilers use MgO-based wet flue gas desulfurization (FGD) systems to remove sulfur dioxide (SO₂). The process converts MgO to magnesium sulfite/sulfate, which can be regenerated or sold as a byproduct. MgO slurry offers higher absorption efficiency than limestone at lower liquid-to-gas ratios, reducing pumping costs. Dead-burned MgO is not suitable; light-burned caustic magnesia with high reactivity (low citric acid value, typically <30 seconds) is required for rapid SO₂ neutralization.
In industrial water treatment, magnesium oxide is used to precipitate heavy metals and silica from wastewater. It also serves as a pH buffer and coagulant aid in biological treatment systems. Specifications for water treatment MgO emphasize low heavy metal content and controlled particle size for slurry dosing.
Understanding the end-use is vital when deciding what magnesium oxide grade to buy. Misapplication can lead to production failures, costly rework, and safety risks. Here’s a summary table to guide B2B buyers:
| Parameter | Light-Burned MgO | Dead-Burned MgO |
|---|---|---|
| Calcination Temperature | 700–1000°C | 1500–2000°C |
| Reactivity | High – slakes in water, reacts with acids | Very low – inert, hydration-resistant |
| Bulk Density | 0.3–0.8 g/cm³ (loose) | 2.2–2.7 g/cm³ (dead-burned grain) |
| Typical Purity | 85–96% MgO | 90–98% MgO |
| Key Applications | Animal feed, fertilizer, FGD, water treatment, magnesium chemicals | Refractory bricks, monolithic castables, ramming mixes |
Buyers should always request a Certificate of Analysis (COA) covering chemical composition, loss on ignition, particle size distribution, and, for dead-burned grades, bulk specific gravity and hydration resistance. At Hailei Chemical, we provide full documentation with every shipment.
When you buy magnesium oxide near me from a local distributor, you might not get the depth of technical data required for consistent industrial processes. International buyers sourcing from China expect adherence to the following standards:
With over 15 years of export experience, Hailei Chemical is a premier supplier of both light-burned and dead-burned magnesium oxide. We understand the diverse demands of industrial-grade magnesium oxide across animal nutrition, environmental engineering, and high-temperature processes.
Our advantages:
Whether you are formulating a magnesium oxide supplement for horses, producing high-performance basic refractories, or engineering an FGD system, we have the technical grade to match your specifications. Questions about what is magnesium oxide used for? Our technical team provides application-specific guidance from sampling to full-scale delivery.
Request a quote today for your magnesium oxide requirements, or visit our product page to download typical data sheets and MSDS. Let’s partner to secure a consistent, high-purity MgO supply for your industrial success.
Magnesium oxide for horses has become the cornerstone of equine mineral supplementation, trusted by feed millers and nutritionists worldwide. At Hailei Chemical, we understand that sourcing a consistent, high-purity magnesium oxide (MgO) for equine feed is not just about meeting a specification—it’s about safeguarding animal health, feed stability, and your brand’s reputation. This comprehensive guide walks procurement managers, formulators, and quality directors through everything they need to know about selecting, specifying, and buying magnesium oxide for horses, with a sharp focus on industrial-scale supply.
A common question among new buyers is: Is magnesium oxide magnesium? The answer is both yes and no. Magnesium oxide (MgO) is the chemical compound formed when magnesium metal combines with oxygen. It contains approximately 60% elemental magnesium by weight—the active nutrient horses require. So, when you add magnesium oxide in feed, you are delivering bioavailable magnesium, but the animal must first digest the oxide matrix. This is a crucial distinction for formulation: calculating the correct dosage of MgO requires knowing its magnesium content precisely. Light-burned magnesium oxide, our recommended grade for equine nutrition, typically guarantees an Mg content of 54–56%, making it one of the most concentrated sources of magnesium available.
Horses lose magnesium daily through sweat, urine, and metabolic processes. Pasture soils are often depleted, meaning forage alone rarely meets a performance horse’s demands. Subclinical deficiency can manifest as nervousness, muscle tremors, tying-up, and reduced tolerance to stress—symptoms easily mistaken for behavioral issues. For breeding stock and young horses, inadequate magnesium impacts bone development and enzyme function. This is why magnesium oxide for horses has become a non-negotiable ingredient in premium equine feeds. By incorporating a high-purity, dust-free MgO, feed manufacturers can create balanced rations that support muscle function, nerve transmission, and energy metabolism—all without adding excessive bulk to the formulation.
Not all magnesium oxide is created equal. For equine supplementation, feed millers must look beyond price per metric ton and evaluate a supplier’s technical offering. Hailei Chemical provides a detailed certificate of analysis with every shipment, covering these critical parameters.
The total Mg content, expressed as MgO, should be no less than 96% for light-burned agricultural grade. This ensures maximum nutrient density and minimal impurities. Lower-purity sources often contain carbonates or silicates that dilute magnesium levels and can alter feed pH.
Stringent limits on lead, arsenic, cadmium, and mercury are non-negotiable. AAFCO and European Union directives set clear thresholds. Our magnesium oxide for horses consistently reports < 1 ppm lead, < 0.5 ppm arsenic, and < 0.2 ppm cadmium, well within feed-grade requirements. Always request a full heavy metal panel to protect both animals and your regulatory standing.
The reactivity and solubility of MgO in the equine digestive tract depend heavily on particle size and specific surface area. Light-burned grades with a median particle size of 150 µm to 300 µm offer an optimal balance between flowability in mixing lines and adequate rumen solubility. Finer powders may increase dust and handling risks, while coarser particles reduce bioavailability. At Hailei, we can tailor particle size distributions to your premix requirements, ensuring consistent blend homogeneity and reliable nutrient delivery in every scoop.
Magnesium oxide is available in two principal forms: light-burned (caustic calcined) and dead-burned (sintered). Light-burned MgO is produced at lower temperatures (800–1000 °C), retaining a porous, reactive structure ideal for animal nutrition and flue gas desulfurization. Dead-burned MgO is calcined above 1500 °C and is virtually inert, making it perfect for refractory bricks but unsuitable for feed. When sourcing magnesium oxide in feed for horses, always specify light-burned grade—its reactivity ensures the magnesium is available for absorption. Using dead-burned MgO in equine diets would be both ineffective and potentially harmful due to its insoluble nature.
Many buyers ask: what about bulk magnesium hydroxide? The magnesium oxide versus magnesium hydroxide debate is nuanced. Magnesium hydroxide (Mg(OH)₂) contains about 41% elemental magnesium, compared to 60% in MgO. That means you need nearly 50% more product weight to deliver the same magnesium dose—increasing freight costs and bulk handling. Magnesium hydroxide also has a high neutralising value, which can interfere with feed acidifiers or preservatives. While magnesium hydroxide finds use in antacids and some specialty feeds, magnesium oxide remains the industry standard for equine nutrition due to its higher nutrient density, lower inclusion rate, and proven stability in premixes. For most feed manufacturers, our magnesium oxide product delivers superior economics and performance.
When purchasing magnesium oxide for horses in bulk, consider these commercial factors:
For over two decades, feed manufacturers have trusted Hailei Chemical for high-quality magnesium oxide for animal feed. Our ISO 9001:2015 certified facilities employ sophisticated rotary kiln technology with real-time process control, ensuring batch-to-batch consistency that protects your feed formulations. We specialize in working with procurement teams to define precise specifications: from magnesium content and heavy metal limits to particle size curves and bulk density. Our logistics team manages all aspects of export, including dangerous goods declarations when required, vessel booking, and document preparation, so you receive your MgO on time, every time.
Whether you are formulating a premium equine supplement pellet or a complete feed, the magnesium oxide for horses you choose directly impacts your product’s efficacy and your brand’s reputation.
Ready to evaluate Hailei Chemical’s magnesium oxide for horses in your own feed line? Contact our team to receive a complimentary sample kit, a recent certificate of analysis, and a competitive quote tailored to your volume requirements. Let’s collaborate to find the exact grade that matches your nutritional and manufacturing goals.
Get a personalized quote now or visit our magnesium oxide product page for detailed technical data sheets.
Magnesium oxide for horses has become the cornerstone of equine mineral supplementation, trusted by feed millers and nutritionists worldwide. At Hailei Chemical, we understand that sourcing a consistent, high-purity magnesium oxide (MgO) for equine feed is not just about meeting a specification—it’s about safeguarding animal health, feed stability, and your brand’s reputation. This comprehensive guide walks procurement managers, formulators, and quality directors through everything they need to know about selecting, specifying, and buying magnesium oxide for horses, with a sharp focus on industrial-scale supply.
A common question among new buyers is: Is magnesium oxide magnesium? The answer is both yes and no. Magnesium oxide (MgO) is the chemical compound formed when magnesium metal combines with oxygen. It contains approximately 60% elemental magnesium by weight—the active nutrient horses require. So, when you add magnesium oxide in feed, you are delivering bioavailable magnesium, but the animal must first digest the oxide matrix. This is a crucial distinction for formulation: calculating the correct dosage of MgO requires knowing its magnesium content precisely. Light-burned magnesium oxide, our recommended grade for equine nutrition, typically guarantees an Mg content of 54–56%, making it one of the most concentrated sources of magnesium available.
Horses lose magnesium daily through sweat, urine, and metabolic processes. Pasture soils are often depleted, meaning forage alone rarely meets a performance horse’s demands. Subclinical deficiency can manifest as nervousness, muscle tremors, tying-up, and reduced tolerance to stress—symptoms easily mistaken for behavioral issues. For breeding stock and young horses, inadequate magnesium impacts bone development and enzyme function. This is why magnesium oxide for horses has become a non-negotiable ingredient in premium equine feeds. By incorporating a high-purity, dust-free MgO, feed manufacturers can create balanced rations that support muscle function, nerve transmission, and energy metabolism—all without adding excessive bulk to the formulation.
Not all magnesium oxide is created equal. For equine supplementation, feed millers must look beyond price per metric ton and evaluate a supplier’s technical offering. Hailei Chemical provides a detailed certificate of analysis with every shipment, covering these critical parameters.
The total Mg content, expressed as MgO, should be no less than 96% for light-burned agricultural grade. This ensures maximum nutrient density and minimal impurities. Lower-purity sources often contain carbonates or silicates that dilute magnesium levels and can alter feed pH.
Stringent limits on lead, arsenic, cadmium, and mercury are non-negotiable. AAFCO and European Union directives set clear thresholds. Our magnesium oxide for horses consistently reports < 1 ppm lead, < 0.5 ppm arsenic, and < 0.2 ppm cadmium, well within feed-grade requirements. Always request a full heavy metal panel to protect both animals and your regulatory standing.
The reactivity and solubility of MgO in the equine digestive tract depend heavily on particle size and specific surface area. Light-burned grades with a median particle size of 150 µm to 300 µm offer an optimal balance between flowability in mixing lines and adequate rumen solubility. Finer powders may increase dust and handling risks, while coarser particles reduce bioavailability. At Hailei, we can tailor particle size distributions to your premix requirements, ensuring consistent blend homogeneity and reliable nutrient delivery in every scoop.
Magnesium oxide is available in two principal forms: light-burned (caustic calcined) and dead-burned (sintered). Light-burned MgO is produced at lower temperatures (800–1000 °C), retaining a porous, reactive structure ideal for animal nutrition and flue gas desulfurization. Dead-burned MgO is calcined above 1500 °C and is virtually inert, making it perfect for refractory bricks but unsuitable for feed. When sourcing magnesium oxide in feed for horses, always specify light-burned grade—its reactivity ensures the magnesium is available for absorption. Using dead-burned MgO in equine diets would be both ineffective and potentially harmful due to its insoluble nature.
Many buyers ask: what about bulk magnesium hydroxide? The magnesium oxide versus magnesium hydroxide debate is nuanced. Magnesium hydroxide (Mg(OH)₂) contains about 41% elemental magnesium, compared to 60% in MgO. That means you need nearly 50% more product weight to deliver the same magnesium dose—increasing freight costs and bulk handling. Magnesium hydroxide also has a high neutralising value, which can interfere with feed acidifiers or preservatives. While magnesium hydroxide finds use in antacids and some specialty feeds, magnesium oxide remains the industry standard for equine nutrition due to its higher nutrient density, lower inclusion rate, and proven stability in premixes. For most feed manufacturers, our magnesium oxide product delivers superior economics and performance.
When purchasing magnesium oxide for horses in bulk, consider these commercial factors:
For over two decades, feed manufacturers have trusted Hailei Chemical for high-quality magnesium oxide for animal feed. Our ISO 9001:2015 certified facilities employ sophisticated rotary kiln technology with real-time process control, ensuring batch-to-batch consistency that protects your feed formulations. We specialize in working with procurement teams to define precise specifications: from magnesium content and heavy metal limits to particle size curves and bulk density. Our logistics team manages all aspects of export, including dangerous goods declarations when required, vessel booking, and document preparation, so you receive your MgO on time, every time.
Whether you are formulating a premium equine supplement pellet or a complete feed, the magnesium oxide for horses you choose directly impacts your product’s efficacy and your brand’s reputation.
Ready to evaluate Hailei Chemical’s magnesium oxide for horses in your own feed line? Contact our team to receive a complimentary sample kit, a recent certificate of analysis, and a competitive quote tailored to your volume requirements. Let’s collaborate to find the exact grade that matches your nutritional and manufacturing goals.
Get a personalized quote now or visit our magnesium oxide product page for detailed technical data sheets.
Magnesium oxide for horses has become the cornerstone of equine mineral supplementation, trusted by feed millers and nutritionists worldwide. At Hailei Chemical, we understand that sourcing a consistent, high-purity magnesium oxide (MgO) for equine feed is not just about meeting a specification—it’s about safeguarding animal health, feed stability, and your brand’s reputation. This comprehensive guide walks procurement managers, formulators, and quality directors through everything they need to know about selecting, specifying, and buying magnesium oxide for horses, with a sharp focus on industrial-scale supply.
A common question among new buyers is: Is magnesium oxide magnesium? The answer is both yes and no. Magnesium oxide (MgO) is the chemical compound formed when magnesium metal combines with oxygen. It contains approximately 60% elemental magnesium by weight—the active nutrient horses require. So, when you add magnesium oxide in feed, you are delivering bioavailable magnesium, but the animal must first digest the oxide matrix. This is a crucial distinction for formulation: calculating the correct dosage of MgO requires knowing its magnesium content precisely. Light-burned magnesium oxide, our recommended grade for equine nutrition, typically guarantees an Mg content of 54–56%, making it one of the most concentrated sources of magnesium available.
Horses lose magnesium daily through sweat, urine, and metabolic processes. Pasture soils are often depleted, meaning forage alone rarely meets a performance horse’s demands. Subclinical deficiency can manifest as nervousness, muscle tremors, tying-up, and reduced tolerance to stress—symptoms easily mistaken for behavioral issues. For breeding stock and young horses, inadequate magnesium impacts bone development and enzyme function. This is why magnesium oxide for horses has become a non-negotiable ingredient in premium equine feeds. By incorporating a high-purity, dust-free MgO, feed manufacturers can create balanced rations that support muscle function, nerve transmission, and energy metabolism—all without adding excessive bulk to the formulation.
Not all magnesium oxide is created equal. For equine supplementation, feed millers must look beyond price per metric ton and evaluate a supplier’s technical offering. Hailei Chemical provides a detailed certificate of analysis with every shipment, covering these critical parameters.
The total Mg content, expressed as MgO, should be no less than 96% for light-burned agricultural grade. This ensures maximum nutrient density and minimal impurities. Lower-purity sources often contain carbonates or silicates that dilute magnesium levels and can alter feed pH.
Stringent limits on lead, arsenic, cadmium, and mercury are non-negotiable. AAFCO and European Union directives set clear thresholds. Our magnesium oxide for horses consistently reports < 1 ppm lead, < 0.5 ppm arsenic, and < 0.2 ppm cadmium, well within feed-grade requirements. Always request a full heavy metal panel to protect both animals and your regulatory standing.
The reactivity and solubility of MgO in the equine digestive tract depend heavily on particle size and specific surface area. Light-burned grades with a median particle size of 150 µm to 300 µm offer an optimal balance between flowability in mixing lines and adequate rumen solubility. Finer powders may increase dust and handling risks, while coarser particles reduce bioavailability. At Hailei, we can tailor particle size distributions to your premix requirements, ensuring consistent blend homogeneity and reliable nutrient delivery in every scoop.
Magnesium oxide is available in two principal forms: light-burned (caustic calcined) and dead-burned (sintered). Light-burned MgO is produced at lower temperatures (800–1000 °C), retaining a porous, reactive structure ideal for animal nutrition and flue gas desulfurization. Dead-burned MgO is calcined above 1500 °C and is virtually inert, making it perfect for refractory bricks but unsuitable for feed. When sourcing magnesium oxide in feed for horses, always specify light-burned grade—its reactivity ensures the magnesium is available for absorption. Using dead-burned MgO in equine diets would be both ineffective and potentially harmful due to its insoluble nature.
Many buyers ask: what about bulk magnesium hydroxide? The magnesium oxide versus magnesium hydroxide debate is nuanced. Magnesium hydroxide (Mg(OH)₂) contains about 41% elemental magnesium, compared to 60% in MgO. That means you need nearly 50% more product weight to deliver the same magnesium dose—increasing freight costs and bulk handling. Magnesium hydroxide also has a high neutralising value, which can interfere with feed acidifiers or preservatives. While magnesium hydroxide finds use in antacids and some specialty feeds, magnesium oxide remains the industry standard for equine nutrition due to its higher nutrient density, lower inclusion rate, and proven stability in premixes. For most feed manufacturers, our magnesium oxide product delivers superior economics and performance.
When purchasing magnesium oxide for horses in bulk, consider these commercial factors:
For over two decades, feed manufacturers have trusted Hailei Chemical for high-quality magnesium oxide for animal feed. Our ISO 9001:2015 certified facilities employ sophisticated rotary kiln technology with real-time process control, ensuring batch-to-batch consistency that protects your feed formulations. We specialize in working with procurement teams to define precise specifications: from magnesium content and heavy metal limits to particle size curves and bulk density. Our logistics team manages all aspects of export, including dangerous goods declarations when required, vessel booking, and document preparation, so you receive your MgO on time, every time.
Whether you are formulating a premium equine supplement pellet or a complete feed, the magnesium oxide for horses you choose directly impacts your product’s efficacy and your brand’s reputation.
Ready to evaluate Hailei Chemical’s magnesium oxide for horses in your own feed line? Contact our team to receive a complimentary sample kit, a recent certificate of analysis, and a competitive quote tailored to your volume requirements. Let’s collaborate to find the exact grade that matches your nutritional and manufacturing goals.
Get a personalized quote now or visit our magnesium oxide product page for detailed technical data sheets.