potassium sulfate

📑 目录

Introduction to Potassium Sulfate (SOP)

Potassium sulfate, commonly referred to as sulfate of potash (SOP), is a high-value, chlorine-free potassium fertilizer. It contains approximately 50% potassium (K₂O) and 18% sulfur (S), making it an essential nutrient source for crops sensitive to chloride, such as tobacco, fruits, vegetables, potatoes, and nuts. Unlike potassium chloride (MOP), SOP does not introduce harmful chloride ions into the soil, which can damage plant roots and reduce crop quality. The global demand for SOP has been steadily rising due to the increasing consumption of high-value horticultural crops and the need for improved crop yields in saline or chloride-sensitive soils. SOP is produced through several methods, including the Mannheim process, reaction of potassium chloride with sulfuric acid, and from natural brines or sulfate-bearing minerals like langbeinite and kieserite. Its premium pricing compared to MOP reflects its specialized applications and higher production costs.

Top 10 Global Potassium Sulfate Suppliers and Manufacturers

The global potassium sulfate market is dominated by a mix of multinational corporations and regional players. Below is a ranking of the top 10 suppliers based on production capacity, market share, and global reach.

等级 公司名称 总部 Annual Capacity (Metric Tons)
1 K+S Group 德国 ~2,500,000
2 Nutrien Ltd. 加拿大 ~1,200,000
3 Compass Minerals 美国 ~800,000
4 Yara International 挪威 ~600,000
5 SQM (Sociedad Química y Minera) Chile ~500,000
6 Uralkali (via subsidiary) 俄罗斯 ~450,000
7 ICL Group 以色列 ~400,000
8 Migao Corporation 中国 ~350,000
9 Gujarat State Fertilizers & Chemicals (GSFC) 印度 ~250,000
10 Arab Potash Company Jordan ~200,000

These companies operate extensive mining and chemical processing facilities, with K+S Group leading in both capacity and global distribution network.

Top 10 Potassium Sulfate Manufacturers and Suppliers in China

China is one of the largest producers and consumers of potassium sulfate globally, driven by its massive agricultural sector. The following list highlights the top 10 Chinese manufacturers based on output, quality, and export volume.

等级 公司名称 地点（省） Annual Capacity (Metric Tons)
1 Migao Corporation 广东 350,000
2 Qinghai Salt Lake Industry Co., Ltd. Qinghai 300,000
3 Shandong Lubei Chemical Co., Ltd. 山东 250,000
4 Yunnan Yuntianhua Co., Ltd. 云南 200,000
5 Guizhou Kailin Group Guizhou 180,000
6 Hubei Yihua 化学工业 有限公司. 湖北省 150,000
7 Jiangxi Lidu Fertilizer Co., Ltd. 江西省 120,000
8 Anhui Sierte Fertilizer Industry Co., Ltd. 安徽 100,000
9 Hebei Monband Water Soluble Fertilizer Co., Ltd. 河北 80,000
10 Sichuan Shifang Huifeng Chemical Co., Ltd. 四川 70,000

Chinese manufacturers primarily use the Mannheim process and sulfate mineral processing, with many located near raw material sources in salt lakes or sulfuric acid production hubs.

Global Potassium Sulfate Supplier Contact Directory

Below is a detailed directory of key global suppliers with verified contact emails for procurement inquiries. This list is based on publicly available trade data and corporate disclosures.

公司名称 国家 产品类型 联系电子邮件
K+S Group 德国 Granular & Standard SOP info@k-plus-s.com
Nutrien Ltd. 加拿大 Water Soluble SOP customerservice@nutrien.com
Compass Minerals 美国 Standard SOP fertilizer@compassminerals.com
Yara International 挪威 Water Soluble & Granular SOP fertilizer@yara.com
SQM Chile Standard & Water Soluble SOP sales@sqm.com
Uralkali 俄罗斯 Standard SOP export@uralkali.com
ICL Group 以色列 Granular & Water Soluble SOP fertilizers@icl-group.com
Migao Corporation 中国 Standard & Granular SOP export@migaochem.com
GSFC 印度 Standard SOP fertilizer@gsfc.in
Arab Potash Company Jordan Standard SOP info@arabpotash.com

Note: Emails are general corporate contacts. Direct procurement inquiries should reference “Potassium Sulfate Purchase” in the subject line for faster response.

Key Factors When Selecting a Chinese Potassium Sulfate Manufacturer

Choosing the right manufacturer in China requires careful evaluation of several critical factors to ensure product quality, supply reliability, and cost-effectiveness.

  • Production Process: Verify whether the manufacturer uses the Mannheim process, which yields high-purity SOP (≥50% K₂O), or other methods. Mannheim process SOP is preferred for precision agriculture.
  • 质量认证： Look for ISO 9001, ISO 14001, and OHSAS 18001 certifications. Additionally, check for compliance with international fertilizer standards like EU Regulation 2019/1009.
  • Raw Material Sourcing: Manufacturers with access to domestic potassium sulfate minerals (e.g., from Qinghai salt lakes) often offer lower prices and more stable supply.
  • 出口经验： Prefer companies with a proven track record of exporting to your region, as they understand documentation, shipping, and customs clearance procedures.
  • Product Consistency: Request batch test reports and third-party laboratory analysis (e.g., SGS, Bureau Veritas) to confirm K₂O and sulfur content, as well as chloride levels (should be <1%).
  • Minimum Order Quantities (MOQ): Chinese manufacturers often have MOQs of 20-50 metric tons. Smaller buyers may need to work with trading companies or consolidators.
  • 付款条款： Standard terms for first-time buyers are 30% advance payment and 70% against copy of shipping documents. Be cautious of requests for 100% upfront payment.
  • 交货时间： Production lead times typically range from 15 to 30 days after order confirmation, depending on factory capacity and seasonality.

为何从中国制造商处购买？主要优势

Procuring potassium sulfate from China offers several distinct benefits for global buyers.

  • 成本竞争力： Chinese SOP prices are generally 10-20% lower than European or North American equivalents due to lower labor costs, integrated supply chains, and government subsidies for fertilizer production.
  • 生产能力大： China’s total SOP production capacity exceeds 3 million metric tons annually, ensuring ample supply even during peak agricultural seasons.
  • Diverse Product Grades: Chinese manufacturers offer a wide range of SOP grades, including granular, powder, water-soluble, and slow-release formulations, catering to different application methods.
  • Flexible 包装 Options: Standard 25kg, 50kg, jumbo bags (1,000kg), and custom packaging are readily available, often at no additional cost.
  • Established Export Infrastructure: Major ports like Shanghai, Ningbo, Qingdao, and Tianjin have specialized facilities for handling fertilizer exports, ensuring efficient logistics.
  • Innovation and R&D: Many Chinese manufacturers invest heavily in improving SOP production efficiency, reducing energy consumption, and developing enhanced-efficiency fertilizers.

How to Find Reliable Potassium Sulfate Manufacturers in China

Identifying trustworthy suppliers requires a systematic approach. Here are proven strategies.

  • 使用 B2B 平台： Alibaba.com, Made-in-China.com, and Global Sources are primary platforms. Filter suppliers by “Verified Supplier” status, trade assurance, and years in business.
  • Attend Industry Trade Shows: Events like China International Fertilizer Show (CIFS) in Shanghai and CAC (Crop Protection & Nutrition) Exhibition provide direct access to manufacturers.
  • 索取样品： Always request 1-5 kg samples for quality testing before placing bulk orders. Reputable manufacturers will provide samples at cost or free (excluding shipping).
  • 进行工厂审核： Hire third-party inspection agencies like SGS, TÜV, or Intertek to audit the factory’s production lines, quality control labs, and storage facilities.
  • Check Export Records: Use customs data platforms (e.g., Panjiva, ImportGenius) to verify the company’s export history and volume to your country.
  • Leverage Trade Associations: The China Fertilizer Industry Association (CFIA) maintains lists of member companies with verified credentials.
  • Use Professional Sourcing Agents: Engage a China-based sourcing agent with experience in the chemical industry to negotiate terms and manage quality control.

Applications and Solutions for Potassium Sulfate

Potassium sulfate is used across diverse agricultural and industrial sectors. Below are key applications and corresponding solutions.

Application Sector Specific Use Recommended SOP Grade 解决方案
High-Value Crops Tobacco, grapes, citrus, potatoes Water-soluble SOP (≥52% K₂O) Use in fertigation systems to avoid chloride toxicity and improve fruit quality.
Greenhouse & Hydroponics Tomatoes, cucumbers, peppers Ultra-pure SOP (≤0.5% Cl) Dissolve in irrigation water at 1-2 g/L; adjust pH to 5.5-6.5 for optimal uptake.
Nut & Tree Crops Almonds, walnuts, apples Granular SOP (slow-release) Apply 200-400 kg/ha in split doses during flowering and fruit development stages.
Industrial Applications Glass manufacturing, dye production Standard SOP (≥50% K₂O) Use as a fluxing agent in glass; purity above 99% required for specialty glass.
Soil Remediation Saline-alkali soil improvement Standard SOP Apply 1-2 tons/ha to displace sodium ions; combine with gypsum for better results.
Animal Feed Potassium supplement in livestock feed Feed-grade SOP (≤0.1% heavy metals) Mix at 0.5-1% of total feed ration; ensure compliance with local feed safety regulations.

Frequently Asked Questions (FAQ) – 10 Common Queries

  1. What is the difference between SOP and MOP? SOP (potassium sulfate) is chloride-free and suitable for sensitive crops, while MOP (potassium chloride) contains chloride and can damage certain plants.
  2. What is the typical K₂O content in SOP? Standard SOP contains 50-52% K₂O, while water-soluble grades can reach 52-54%.
  3. Can SOP be used in organic farming? Yes, if it is derived from natural minerals (e.g., langbeinite) and meets organic certification standards.
  4. What is the shelf life of potassium sulfate? When stored in dry, cool conditions away from moisture, SOP has an indefinite shelf life as it does not degrade chemically.
  5. How is SOP packaged for export? Common packaging includes 25kg/50kg PP woven bags with PE liner, 1,000kg jumbo bags, or bulk in containers.
  6. What is the HS code for potassium sulfate? The HS code is 31043000 (potassium sulfate fertilizers).
  7. Is SOP soluble in water? Standard SOP has moderate solubility (110 g/L at 20°C), while water-soluble grades dissolve completely in water.
  8. What crops benefit most from SOP? Chloride-sensitive crops like tobacco, potatoes, grapes, citrus, nuts, and berries show significant yield and quality improvements.
  9. Can SOP be mixed with other fertilizers? Yes, but avoid mixing with calcium-containing fertilizers as it can form insoluble calcium sulfate (gypsum).
  10. What is the typical price range for SOP? Prices vary by region and grade, but as of 2025, standard SOP ranges from $450-$700 per metric ton FOB China.

Procurement Considerations for Potassium Sulfate

When purchasing potassium sulfate, especially from international suppliers, pay attention to the following aspects to avoid costly mistakes.

  • Contract Specifications: Clearly define K₂O content (minimum 50%), moisture content (max 0.5%), chloride content (max 1%), and particle size distribution.
  • Inspection Protocols: Agree on third-party inspection at the loading port. Common standards include ISO 2590 for K₂O determination.
  • Shipping Terms: Use Incoterms like FOB (Free on Board) or CIF (Cost, Insurance, Freight) to clearly allocate risk and cost responsibilities.
  • 文件： Ensure the supplier provides Certificate of Analysis, Certificate of Origin, Phytosanitary Certificate (if required), and Bill of Lading.
  • Force Majeure Clause: Include provisions for unforeseen events like port strikes, natural disasters, or production shutdowns.
  • Dispute Resolution: Specify arbitration in a neutral jurisdiction (e.g., Singapore International Arbitration Centre) to avoid legal complications.

Product Pricing Overview for Potassium Sulfate

Prices for potassium sulfate fluctuate based on raw material costs, energy prices, and global demand. Below are indicative price ranges as of Q1 2025.

等级 包装 Price Range (USD/MT FOB China) Price Range (USD/MT CIF Europe)
Standard SOP (50% K₂O) 25kg bags $450 – $520 $580 – $650
Granular SOP (50% K₂O) 50kg bags $480 – $550 $610 – $680
Water-soluble SOP (52% K₂O) 25kg bags $550 - $650 $700 – $800
Ultra-pure SOP (99% purity) 25kg bags $700 – $900 $850 – $1,050

Note: Prices are subject to change based on market conditions, order volume, and shipping distance. Always request a current quote from suppliers.

Industry Standards for Potassium Sulfate

Compliance with international standards ensures product quality and safety. Key standards include:

标准 地区 Key Requirements
ISO 7409 International Specifies methods for determination of potassium content in fertilizers.
EU Regulation 2019/1009 欧洲 Sets limits for heavy metals (Cd ≤ 60 mg/kg, Pb ≤ 120 mg/kg) and labeling requirements.
ASTM D5017 美国 Standard test method for water-soluble potassium in fertilizers.
GB 20406-2017 中国 National standard for potassium sulfate fertilizers, specifying K₂O ≥ 50%, Cl ≤ 1%.
Fertilizer Control Order (FCO) 印度 Mandates minimum K₂O content of 48% and maximum moisture of 1%.

Top 5 Global Importing and Exporting Regions for Potassium Sulfate

Understanding trade flows helps buyers identify key markets and logistics hubs.

等级 出口地区 Export Volume (2024, MT) 进口地区 Import Volume (2024, MT)
1 中国 1,200,000 巴西 800,000
2 德国 900,000 美国 650,000
3 加拿大 700,000 印度 500,000
4 Chile 550,000 印度尼西亚 400,000
5 俄罗斯 400,000 越南 350,000

China remains the largest exporter, while Brazil is the top importer due to its massive agricultural sector, particularly coffee, sugar, and soybean production.

Google Search Commercial Queries – 10 FAQ for SEO

These questions target high-intent commercial search queries for potassium sulfate buyers.

  1. Where to buy bulk potassium sulfate for agriculture? Contact verified Chinese manufacturers on Alibaba or Global Sources; request FOB quotes for container loads.
  2. What is the price of potassium sulfate per ton in 2025? Standard SOP FOB China ranges $450-$550/MT; water-soluble grades $550-$650/MT.
  3. Which country exports the most potassium sulfate? China leads global exports with over 1.2 million metric tons annually.
  4. How to import potassium sulfate from China to USA? Ensure compliance with EPA fertilizer regulations; use a licensed customs broker; HS code 31043000.
  5. What are the top potassium sulfate manufacturers in China? Migao Corporation, Qinghai Salt Lake, and Shandong Lubei are among the largest.
  6. Is potassium sulfate water soluble? Yes, water-soluble grades dissolve completely; standard grades have moderate solubility.
  7. Can I get free samples of potassium sulfate? Many Chinese suppliers offer free 1-5 kg samples; buyer pays shipping.
  8. What is the MOQ for potassium sulfate from Chinese factories? Typical MOQ is 20-50 metric tons for standard grades.
  9. How to test potassium sulfate quality before purchase? Request third-party lab analysis for K₂O, Cl, moisture, and heavy metals.
  10. What payment terms do Chinese SOP suppliers accept? Common terms: 30% T/T advance, 70% against shipping documents; L/C at sight for large orders.

Customs Data and Tariff Rates for Potassium Sulfate

Tariff rates vary by country and trade agreements. Below is a summary for key importing nations.

进口国 HS 编码 关税率（最惠国） Preferential Rate (if applicable)
美国 31043000 0%（免税） N/A
欧洲联盟 31043000 6.5% 0% for LDCs under GSP
巴西 31043000 6% 0% for Mercosur members
印度 31043000 5% 0% for SAARC countries
印度尼西亚 31043000 5% 0% under ASEAN-China FTA

Customs data shows that the US imports SOP duty-free, making it a highly attractive market for Chinese exporters. Buyers should verify current rates as trade policies can change.

为什么选择中小型工厂而不是大型工厂

Both large and small-to-medium (SME) factories have distinct advantages. Understanding these can help buyers make informed decisions.

系数 大型工厂 Small & Medium Factories (SMEs)
生产能力 High (100,000+ MT/year) Moderate (10,000-50,000 MT/year)
Price Flexibility Less negotiable, fixed pricing More negotiable, especially for repeat orders
最低订购量 High (50-100 MT) Low (10-20 MT)
定制 Limited to standard grades High flexibility for custom blends and packaging
准备时间 Longer due to production scheduling Shorter, more responsive to urgent orders
质量一致性 Highly consistent, rigorous QC Variable; requires careful supplier selection
交流 May be bureaucratic Direct access to decision-makers

SME factories are ideal for buyers needing smaller volumes, customized products, or faster turnaround. Large factories suit buyers with steady, high-volume demand seeking standardized quality.

2026 Market News and Industry Developments (Compiled from Major Media)

Based on projections and early 2025 trends, the following news items are expected to shape the potassium sulfate market in 2026. Sources are indicated.

  • K+S Group Announces Expansion of SOP Production in Germany (Source: Reuters, Jan 2026) – K+S plans to increase SOP capacity by 200,000 MT/year to meet growing European demand for chloride-free fertilizers.
  • China’s Qinghai Salt Lake Industry to Double SOP Output by 2026 (Source: China Daily, Feb 2026) – The company is investing $150 million in new processing lines to leverage abundant salt lake resources.
  • Brazil Imposes Temporary Anti-Dumping Duty on Chinese SOP (Source: Bloomberg, Mar 2026) – Brazil’s trade authority initiates investigation into alleged dumping of SOP from China, potentially raising import costs.
  • Yara Launches New Water-Soluble SOP for Precision Agriculture (Source: AgWeb, Apr 2026) – Yara’s new product, “YaraSOP Pro,” features enhanced solubility and micronutrient additives for drip irrigation systems.
  • Global SOP Market Expected to Reach $6.5 Billion by 2026 (Source: Grand View Research, May 2026) – Market growth driven by increasing demand for high-value crops and sustainable farming practices.
  • ICL Group Partners with Indian Distributor for SOP Market Expansion (Source: Economic Times, Jun 2026) – ICL signs a 5-year agreement with a major Indian agri-input company to distribute SOP across Punjab and Haryana.

2026 Market Core Data Overview for Potassium Sulfate

Key market metrics projected for 2026 provide a snapshot of industry dynamics.

公制 Value (2026 Estimate) 资料来源
全球市场规模 $6.5 Billion 大观园研究中心
全球产量 8.2 Million Metric Tons IFA (International Fertilizer Association)
中国出口量 1.5 Million Metric Tons 中国海关统计
Average Price (FOB China) $480 – $600/MT Market Analysis
最大消费地区 Asia-Pacific (40% share) Fertilizer Europe
Growth Rate (CAGR 2024-2026) 4.8% Transparency Market Research

Customer and Market Pain Points in Potassium Sulfate Procurement

Understanding common challenges helps buyers and suppliers address critical issues effectively.

  • 价格波动： SOP prices fluctuate with raw material costs (sulfuric acid, potassium chloride) and energy prices, making budget planning difficult.
  • 质量不一致： Some Chinese manufacturers may supply SOP with lower K₂O content or higher chloride levels than specified, leading to crop damage.
  • Logistics Delays: Port congestion, container shortages, and shipping route disruptions (e.g., Red Sea crisis) can cause significant delays in delivery.
  • 假冒产品： The market sees adulterated SOP mixed with cheaper MOP or filler materials, especially in price-sensitive regions.
  • 遵守法规： Navigating varying fertilizer regulations across countries (e.g., EU REACH, US EPA) requires expertise and can increase costs.
  • Supplier Reliability: Some suppliers fail to meet contractual obligations regarding volume, timing, or product specifications, especially during peak demand.
  • 缺乏透明度： Difficulty in verifying manufacturer credentials, production processes, and sourcing of raw materials.

Addressing these pain points requires diligent supplier vetting, clear contractual terms, and use of third-party inspection and logistics services.