Potassium Fertilizer
Potassium Sulfate Supplier China
We supply potassium sulfate (sulfate of potash / SOP) for fruits, vegetables, tobacco, tea, grapes, citrus and drip irrigation systems. Available in granular and water-soluble grades with 25kg bags, jumbo bags, COA, TDS and MSDS for agricultural B2B buyers worldwide.
Potassium Sulfate (SOP) Specifications
Potassium sulfate (SOP) is the preferred potassium source for chloride-sensitive, quality-focused agriculture. It delivers both potassium (~50% K2O) and sulfur (~18% S) in one application, making it especially valuable for fruits, vegetables, tobacco, tea, and fertigation systems where nutrient precision directly affects crop market value.
| Product Name | Potassium Sulfate / Sulfate of Potash (SOP) |
| CAS Number | 7778-80-5 |
| K2O Content | ~50% |
| Sulfur Content | ~18% S |
| Chloride Content | <1% |
| Available Forms | Granular / Powder / Water-Soluble |
| Packaging | 25kg bag / 50kg bag / 1000kg jumbo bag / pallet |
| Origin | China |
| Documents | COA / TDS / MSDS available |
SOP vs MOP: Quick Comparison
| Property | Potassium Sulfate (SOP) | Muriate of Potash (MOP) |
|---|---|---|
| K2O Content | ~50% | ~60% |
| Chloride | <1% | ~47% |
| Sulfur | ~18% S | None |
| Best For | Chloride-sensitive crops, fruits, vegetables, tobacco, tea | General field crops, pasture, chloride-tolerant crops |
| Price Position | Premium | Economy |
SOP is not marketed as the cheapest potassium source. It is marketed as the right source for chloride-sensitive and quality-focused crop programs. Buyers balance input cost against crop response, agronomic suitability, and market value.
Applications of Potassium Sulfate
- Citrus orchards
- Grape production
- Berry cultivation
- Tomato and pepper growing
- Melon and watermelon programs
- Tobacco farming
- Tea plantations
- Greenhouse crops
- Drip irrigation and fertigation
- Horticultural production
Product Forms and Grade Selection
Packaging and Bulk Supply
All packaging is designed for export durability. Standard options: 25kg woven bags, 50kg bags, 1000kg jumbo bags, and palletized packing. Container loading: approximately 20-27MT per 20-foot container depending on packaging format. OEM labels available for qualified orders after artwork confirmation.
Quality Documents Available
Related Resources
Potassium Sulfate Supplier Proof and RFQ Checklist
Before sending a purchase order, buyers should confirm the supplier can match the exact K2O content, chloride level, water solubility, particle form, fertilizer grade, and packing for humid destinations. This checklist helps procurement teams compare real bulk supply, not casual retail purchases.
FAQ About Potassium Sulfate (SOP)
What is potassium sulfate (SOP) used for?
Potassium sulfate is primarily used as a chloride-free potassium fertilizer for chloride-sensitive crops such as fruits, vegetables, tobacco, tea, grapes, citrus, potatoes, and greenhouse crops. It supplies both potassium (K) and sulfur (S) in one application.
What is the difference between SOP and MOP?
SOP (sulfate of potash) contains ~50% K2O and less than 1% chloride with ~18% sulfur. MOP (muriate of potash) contains ~60% K2O but ~47% chloride. SOP is preferred for chloride-sensitive and quality-focused crops despite a higher price per unit of potassium.
Do you supply water-soluble grade potassium sulfate?
Yes. We supply both granular field-grade SOP and water-soluble SOP grades suitable for drip irrigation, fertigation, and greenhouse nutrient delivery systems. Please specify your solubility requirement.
What packaging is available for SOP?
Standard packaging includes 25kg bags, 50kg bags, and 1000kg jumbo bags. Pallet packing and OEM labels can be discussed. Export-quality packaging ensures product integrity during long-distance shipping.
Can you provide COA, TDS and MSDS for SOP?
Yes. COA, TDS and MSDS are available for all grades. Documentation supports customs clearance and end-user quality verification.
What is the MOQ for bulk SOP orders?
MOQ depends on grade and packaging format. Trial orders are often supported. Full container loads (20-27MT per 20-foot container depending on packaging) offer the most economical freight cost.
Looking for a reliable Potassium Sulfate (SOP) supplier?
Contact us today for grade recommendation, COA, TDS, packing details and bulk quotation.
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Bulk Buyer Decision Guide
Potassium Sulfate Procurement Decision Guide
Use this section to qualify potassium sulfate supplier offers before requesting a formal quotation. The goal is to compare suppliers on the same basis: grade, specification, application fit, packing, documents, delivery terms and after-sales communication.
Grade and Specification Checks
Do not compare price only by product name. Confirm the exact grade and the limits that affect your process.
- K2O content
- sulfate content
- chloride limit
- moisture
- solubility
Packing and Export Documents
Ask for packing photos, label language and palletizing details before shipment. Final loading quantity should be confirmed by product density, bag size and destination requirements.
- 25kg bags
- 50kg bags
- jumbo bags by order
- COA, SDS, packing list, invoice and other export documents by order requirement
Common Grade Comparison
| Option | Buyer check |
|---|---|
| SOP fertilizer grade | Confirm assay, appearance, moisture and target application before comparing offers. |
| water-soluble grade by order | Confirm assay, appearance, moisture and target application before comparing offers. |
| granular or powder by requirement | Confirm assay, appearance, moisture and target application before comparing offers. |
Application Fit
| Application | What to confirm |
|---|---|
| Chloride-Sensitive Crops | Share process conditions, target market and required documents so the correct grade can be matched. |
| Fertilizer Blending | Share process conditions, target market and required documents so the correct grade can be matched. |
| Water-Soluble Fertilizer Production | Share process conditions, target market and required documents so the correct grade can be matched. |
RFQ Checklist
Send product name, grade, quantity, destination port, packing, trade term, required documents and target delivery window.
Price Factors
Bulk price changes with assay, form, packing, order volume, freight route, pallet requirement and seasonal demand.
Sample Review
For new suppliers, request a sample or recent COA before bulk order confirmation when your application is sensitive.
Related Product Pages
Procurement Guides
Buyer Notes for Potassium Sulfate Procurement
Confirm crop and use
Potassium sulfate for fertigation, water-soluble fertilizer or granular fertilizer blending should be matched to crop, solubility and chloride sensitivity requirements before quotation.
Check fertilizer specs
Review K2O, sulfur content, chloride limit, moisture, insoluble matter and particle size or solubility. These numbers are more useful than a generic potassium sulfate product name.
Plan repeat supply
For fertilizer programs, keep grade, packing, label, delivery window and document format consistent across orders. This helps distributors manage seasonal demand and customer reorders.
New Potassium Sulfate Procurement Articles
Use these related buyer guides to compare grades, applications, packing, documents and bulk quotation basis before ordering Potassium Sulfate.