For any procurement manager or chemical engineer sourcing industrial chemicals, the soda ash CAS number is far more than a bureaucratic code. The Chemical Abstracts Service (CAS) registry number uniquely identifies sodium carbonate (Naâ‚‚CO₃) as 497-19-8, serving as a universal language that cuts through commercial aliases—from ‘disodium carbonate’ to ‘washing soda’—and local naming conventions. In a market where product identity mix-ups can lead to costly production failures, this numeric fingerprint is the first line of defense in supplier verification, customs clearance, and quality assurance. At Weifang Hailei Fine Chemical Co., Ltd., we embed this identifier into every certificate of analysis, safety data sheet, and shipping document, ensuring that every tonne of dense or light soda ash you receive matches your precise industrial requirements.
Whether you operate a float glass furnace, formulate heavy-duty detergents, or manage flue gas desulfurization at a power plant, knowing the correct CAS number—and how to leverage it during procurement—shields you from adulterated batches, non-compliant imports, and unnecessary detention at port. This guide dissects the science behind soda ash molecular weight, clarifies the soda ash and washing soda difference, and shows you exactly how to vet soda ash for sale offers from an EEAT standpoint, covering everything from regulatory data to real-world application specs.
The soda ash CAS number 497-19-8 acts as a molecular passport for sodium carbonate. In international logistics, regulatory bodies like the European Chemicals Agency (ECHA) and the U.S. Environmental Protection Agency (EPA) use CAS numbers to track substance registrations, manage REACH compliance, and enforce environmental tariffs. For buyers, this means that a supplier’s accurate use of the CAS number on a proforma invoice, bill of lading, and product label is a trust signal. It indicates the supplier operates with the rigor expected under ISO 9001 and REACH frameworks, and that the material will clear customs without demurrage risks.
Misapplying the CAS number—for instance, confusing soda ash with sodium bicarbonate (144-55-8) or caustic soda (1310-73-2)—can trigger off-spec deliveries, dangerous reactions in downstream processes, and even regulatory fines. In one documented case, a detergent plant in Southeast Asia received sodium bicarbonate instead of soda ash because the supplier mixed up the CAS numbers on the shipping manifest, delaying production by three weeks and causing formulation failures that required complete batch disposal. By contrast, specifying your purchase order with both the commercial name and the unambiguous soda ash CAS number closes that risk window, enabling your quality team to cross-reference the CAS number immediately against incoming lot documentation.
Beyond the CAS identifier, soda ash molecular weight—105.99 grams per mole for anhydrous sodium carbonate—is a critical parameter that directly influences stoichiometric calculations in glass batch houses, chemical syntheses, and water softening formulas. When you order soda ash by the metric ton, the molecular weight tells you precisely how much reactive Na₂CO₃ you are buying per unit mass, which in turn drives raw material yield and cost efficiency. For example, in container glass production, an off-spec soda ash with excess moisture or sodium bicarbonate impurity will deliver less available alkali per kilogram, forcing you to over-purchase material to meet the required Na₂O input for melting. That hidden cost can erode margins by 2–4% if not caught during incoming QC.
Professional buyers should use the molecular weight as a benchmark when reviewing supplier certificates of analysis. A high-purity dense soda ash lot should assay at ≥99.2% Naâ‚‚CO₃ by weight, meaning that for every 100 kg of product, the effective sodium carbonate mass corresponds to the theoretical molecular weight within a tight tolerance. Weifang Hailei’s in-house testing uses titration against standardized hydrochloric acid and gravimetric loss-on-ignition methods to verify that every shipment conforms to this molecular benchmark, providing you with the data fidelity you need for ISO 17025-accredited audits. To explore our full range of certified grades, visit Soda Ash & Baking Soda product page.
One of the most persistent procurement misunderstandings revolves around the soda ash and washing soda difference. While often used interchangeably in casual conversation, they represent chemically and commercially distinct materials. ‘Soda ash’ generally refers to anhydrous sodium carbonate (CAS 497-19-8) or its monohydrate form (CAS 5968-11-6), whereas ‘washing soda’ is the decahydrate form Naâ‚‚CO₃·10Hâ‚‚O (CAS 6132-02-1) or the generic name for a household cleaning product. Industrial buyers need to be precise: dense and light soda ash grades, as produced by the Solvay or Hou process, are anhydrous and intended for high-temperature manufacturing processes, while commercially available washing soda crystals are typically of much lower purity and contain significant water of crystallization, reducing the effective Naâ‚‚CO₃ content to roughly 37%.
For a detergent manufacturer, substituting anhydrous soda ash with decahydrate ‘washing soda’ purchased from a retail channel would be disastrous. The hydrate’s lower alkali content would throw off the surfactant builder system, potentially requiring a 300% mass increase to achieve the same pH and hardness sequestration—completely distorting the formulation cost and physical properties. This distinction is why Every professional request for quotation should explicitly state the desired grade (dense or light), specification compliance (e.g., GB/T 210-2022), and the soda ash CAS number you expect to see on paperwork. When you partner with a dedicated industrial exporter like Hailei Chemical, you receive only anhydrous sodium carbonate that conforms to export-grade purity, eliminating the ambiguity that plagues multi-level reseller channels.
Understanding the soda ash CAS number and molecular weight opens the door to specifying the correct grade for your application. Soda ash’s role is not one-size-fits-all; the dense and light variants differ in bulk density, particle size distribution, and dissolution behavior—each optimized for specific industries.
Flat glass, container glass, and fiberglass producers consume roughly 50% of global soda ash output. Here, dense soda ash with a bulk density of 0.9–1.2 g/cm³ is preferred because it reduces dusting during batch handling and melts uniformly with silica sand at around 1,500°C. The CAS number 497-19-8 must appear on every shipment’s documentation to satisfy glass plant raw material auditing, especially in facilities certified to ISO 14001 or those supplying automotive OEMs. Even small impurities like iron oxide (Fe₂O₃) above 50 ppm can discolor the final product, so top-tier suppliers like Hailei Chemical control iron content through stringent raw brine purification in the ammonia-soda process.
In powdered detergents, light soda ash (bulk density 0.5–0.7 g/cm³) is frequently chosen for its faster dissolution and high surface area, which aids in water softening and alkalinity provision. The molecular weight of 105.99 ensures accurate stoichiometry when reacting with calcium and magnesium ions in hard water. A detergent formulator referencing the soda ash molecular weight can precisely calculate the needed weight percentage to achieve a calcium binding capacity of 200–250 mg CaCO₃ per gram of soda ash, directly matching the performance claims on the retail box. If you have been searching for soda ash for sale that meets detergent industry specifications, our Soda Ash & Baking Soda offer includes both dense and light grades with guaranteed INCI naming and full traceability.
Power plants and waste incinerators inject dry soda ash (usually light grade) into flue gas streams to remove SOâ‚‚ and HCl, helping meet increasingly stringent emission limits. The CAS number 497-19-8 must appear in the environmental compliance reports submitted to regulatory authorities, directly linking the abatement performance to the chemical identity. In this context, a soda ash molecular weight verification ensures that the material’s reactivity is consistent, because hydrated or carbonated contaminants would reduce acid neutralization efficiency, potentially causing an exceedance of emission caps. We ship to multiple power generation facilities globally, with packaging options—1-ton FIBCs or 25 kg bags—designed for safe pneumatic conveying into injection silos.
While this guide focuses on soda ash, no discussion of sodium carbonates is complete without acknowledging its sibling, sodium bicarbonate (baking soda, CAS 144-55-8). For food ingredient buyers and pharmaceutical formulators, baking soda is an entirely different substance with unique applications, including its growing popularity for drinking baking soda health benefits. Although not a topic you’ll typically see on a chemical procurement checklist, consumer demand for food-grade sodium bicarbonate solutions—used by some for pH balance or athletic performance—has placed additional purity requirements on B2B suppliers. Food-grade baking soda must comply with FCC, USP, or EU food additive regulation E500(ii), and its CAS number must be strictly segregated from soda ash in your ERP system to prevent dangerous cross-contamination.
Hailei Chemical supplies both soda ash and baking soda under rigorous HACCP and ISO 22000 protocols for food, feed, and pharmaceutical segments. Whether you need bulk quantities of dense soda ash for your glass furnace or food-grade baking soda for a leavening agent application, the same supplier verification logic applies: insist on the correct CAS number, scrutinize the certificate of analysis against industry standards, and demand traceability back to the production batch. For a detailed spec sheet covering both products, explore our Soda Ash & Baking Soda catalog.
When you encounter soda ash for sale offers online, how do you separate a reliable exporter from a superficial trader? Use this five-point checklist to apply EEAT principles to your procurement process:
By adhering to this checklist, you mitigate the risk of receiving off-grade product that can damage your manufacturing process and reputation. Weifang Hailei Fine Chemical Co., Ltd. welcomes such scrutiny and provides full documentation packages with every shipment. Our team can arrange a sample delivery for your lab evaluation—just reach out through our inquiry form for a tailored quotation.
Imagine two containers of white powder arriving at your facility, both labeled only as ‘soda ash,’ but with no CAS number and certificates from different labs. Without the explicit CAS identifier, your QC department must run a full identity test—differential scanning calorimetry (DSC) or diluted acid titration—to confirm anhydrous sodium carbonate, consuming hours that could have been saved by simply requiring the 497-19-8 code on the purchase order. This is why leading chemical distributors in Europe and North America embed the CAS number into digital procurement platforms and automated inventory management systems: it automates receiving inspections and triggers quality hold if a mismatch occurs.
At Hailei Chemical, we have invested in an ERP that syncs the soda ash CAS number with every production lot from the moment it exits the calcination kiln. The molecular weight becomes a real-time process control checkpoint, and the difference between soda ash and washing soda is never blurred because our labeling system prohibits ambiguous trade names. This discipline translates into supply chain resilience for our clients. If you are tired of supplier inconsistencies, we invite you to experience the clarity that an EEAT-oriented chemical partner provides.
Looking beyond the label, smart procurement managers connect the soda ash molecular weight to total delivered cost. Consider freight optimization: dense soda ash, with its higher bulk density, packs more weight per container compared to light soda ash, reducing shipping cost per metric ton of effective Na₂CO₃. By calculating your landed cost using the molecular weight and purity from the COA, you can compare offers on a dry-active-soda-ash basis. For example, an offer of 99.5% purity light soda ash at $200/tonne FOB may actually be more economical than a 98.5% purity dense grade at $195/tonne when you factor in the extra inert mass you are paying to ship and handle. Let the CAS number be your anchor for accurate specification comparison, and let the molecular weight be your calculator for true value.
Our global clients routinely request this level of analytical procurement support. With in-house chemical engineers who speak the language of both lab and logistics, Weifang Hailei Fine Chemical Co., Ltd. helps you model total cost of ownership for your production facility. Whether you need soda ash for sale in container loads or break bulk shipments, we ensure you receive the exact sodium carbonate—and only sodium carbonate—that your process demands.
Don’t let a missing soda ash CAS number or ambiguous specification compromise your next production run. Our team at Hailei Chemical stands ready to supply dense and light soda ash that meets GB/T 210-2022, with full analytical traceability including molecular weight verification, impurity profiles, and CAS number 497-19-8 documentation. Whether you are a glass furnace manager, a detergent formulator, or a power plant environmental officer, partner with a Chinese exporter that puts digital-quality assurance first. Browse our complete range on the Soda Ash & Baking Soda product page, or start a conversation directly through our Get a Quote form to receive a competitive offer and sample.