magnesium sulfate

Magnesium sulfate, commonly known as Epsom salt, is an inorganic salt with the chemical formula MgSO₄. It appears as a white crystalline solid and is highly soluble in water. This compound is naturally occurring in mineral deposits such as kieserite and epsomite. It plays a critical role across multiple industries, including agriculture, pharmaceuticals, food processing, and chemical manufacturing. In agriculture, it serves as a vital source of magnesium and sulfur, essential nutrients for plant growth. In the pharmaceutical sector, it is used for treating magnesium deficiency, eclampsia, and as a laxative. The global market for magnesium sulfate is driven by increasing demand for fertilizers, growing awareness of health supplements, and its application in industrial processes. Understanding the supply chain, key producers, and market dynamics is essential for buyers and stakeholders in this sector.

Top 10 Global Magnesium Sulfate Suppliers and Factories

The global magnesium sulfate market is dominated by a mix of multinational corporations and specialized chemical manufacturers. These companies are recognized for their production capacity, quality standards, and global distribution networks. Below is a ranking of the top 10 suppliers and factories worldwide based on production volume, revenue, and market presence.

等级	公司名称	国家	Annual Production Capacity (Metric Tons)
1	K+S Aktiengesellschaft	德国	2,500,000
2	Compass Minerals International	美国	1,800,000
3	Giles Chemical Corporation	美国	500,000
4	PQ Corporation	美国	400,000
5	Uralkali	俄罗斯	1,200,000
6	Sinochem Group	中国	800,000
7	Laizhou City Laiyu Chemical Co., Ltd.	中国	300,000
8	Weifang Huamei Chemical Co., Ltd.	中国	250,000
9	Hebei Meishen Biotechnology Co., Ltd.	中国	200,000
10	Nippon Chemical Industrial Co., Ltd.	日本	150,000

Top 10 Magnesium Sulfate Suppliers and Factories in China

China is the largest producer and exporter of magnesium sulfate globally. The country benefits from abundant raw materials, low production costs, and advanced manufacturing infrastructure. The following are the top 10 Chinese suppliers and factories, known for their product quality and export capabilities.

等级	公司名称	地点	Annual Production Capacity (Metric Tons)
1	Sinochem Group	北京	800,000
2	Laizhou City Laiyu Chemical Co., Ltd.	山东	300,000
3	Weifang Huamei Chemical Co., Ltd.	山东	250,000
4	Hebei Meishen Biotechnology Co., Ltd.	河北	200,000
5	Shandong Lvfeng Chemical Co., Ltd.	山东	180,000
6	Jinan Huifeng Chemical Co., Ltd.	山东	150,000
7	Zibo Tianyu Chemical Co., Ltd.	山东	120,000
8	Hebei Pengfa Chemical Co., Ltd.	河北	100,000
9	Shandong Xinhe Chemical Co., Ltd.	山东	90,000
10	Wuxi Yangshan Biochemical Co., Ltd.	江苏省	80,000

含电子邮件的全球供应商和工厂联系名单

Below is a detailed list of global magnesium sulfate suppliers and factories, including their contact email addresses for direct inquiries.

公司名称	国家	产品等级	联系电子邮件
K+S Aktiengesellschaft	德国	Agricultural, Industrial	info@k-plus-s.com
Compass Minerals International	美国	Agricultural, Pharmaceutical	customerservice@compassminerals.com
Giles Chemical Corporation	美国	Industrial, Food Grade	sales@gileschemical.com
PQ Corporation	美国	工业	info@pqcorp.com
Uralkali	俄罗斯	Agricultural	info@uralkali.com
Sinochem Group	中国	Agricultural, Industrial	export@sinochem.com
Laizhou City Laiyu Chemical Co., Ltd.	中国	Agricultural, Food Grade	info@laiyuchem.com
Weifang Huamei Chemical Co., Ltd.	中国	Industrial, Pharmaceutical	sales@huameichem.com
Hebei Meishen Biotechnology Co., Ltd.	中国	Agricultural, Feed Grade	meishen@meishenbio.com
Nippon Chemical Industrial Co., Ltd.	日本	Industrial, Pharmaceutical	info@nippon-chem.co.jp

选择中国制造商的关键因素

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

质量认证

Verify that the manufacturer holds relevant certifications such as ISO 9001 for quality management, GMP for pharmaceutical grades, and organic certifications for agricultural use. These certifications indicate adherence to international standards.

生产能力

Assess the manufacturer’s annual production volume to ensure they can meet your order quantities consistently. Larger capacities often indicate better economies of scale and supply stability.

原材料采购

Inquire about the source of raw materials. Manufacturers using high-purity magnesium oxide or natural kieserite produce higher quality magnesium sulfate. Traceability of raw materials is crucial.

出口经验

Choose manufacturers with proven export experience to your target region. They should be familiar with international shipping, documentation, and customs requirements.

定价和付款条件

Compare pricing from multiple suppliers, but avoid extremely low prices that may indicate compromised quality. Negotiate clear payment terms, such as T/T or L/C, and ensure transparency in additional costs like packaging and freight.

样品测试

Request product samples for independent laboratory testing before placing bulk orders. This verifies purity, particle size, and moisture content.

为何从中国制造商处购买？主要优势

Purchasing magnesium sulfate from Chinese manufacturers offers several distinct benefits that make them a preferred choice for global buyers.

成本效益

China benefits from lower labor and raw material costs, resulting in competitive pricing. For example, Chinese manufacturers often offer prices 20-30% lower than European or North American producers.

Large Production Scale

China’s vast production infrastructure allows for economies of scale, ensuring consistent supply even for large-volume orders. Many Chinese factories have capacities exceeding 200,000 metric tons annually.

Product Variety

Chinese manufacturers produce a wide range of magnesium sulfate grades, including agricultural, industrial, food, and pharmaceutical grades, catering to diverse market needs.

先进制造技术

Many Chinese factories have invested in modern production lines with automated processes, ensuring high consistency and purity levels. Technologies like spray drying and crystallization are commonly used.

强大的出口基础设施

China has well-established ports and logistics networks, facilitating efficient global shipping. Major export hubs like Qingdao and Tianjin handle large volumes of chemical exports.

如何在中国找到专业制造商？

Locating reliable magnesium sulfate manufacturers in China requires a systematic approach. Here are effective methods to identify professional suppliers.

在线 B2B 平台

Use platforms like Alibaba, Global Sources, and Made-in-China to search for verified suppliers. Filter by certifications, transaction history, and customer reviews. Look for suppliers with Gold Supplier or Verified Supplier status.

行业贸易展

Attend chemical industry exhibitions such as China 化学工业 Expo (CHEM) or CPhI China. These events provide opportunities to meet manufacturers face-to-face and inspect product samples.

第三方检验服务

Hire inspection companies like SGS, Bureau Veritas, or Intertek to audit potential manufacturers. They can verify production capabilities, quality control processes, and compliance with standards.

Government and Trade Associations

Contact the China Chemical Industry Association or local chambers of commerce for recommendations. They often maintain lists of reputable manufacturers.

Direct Factory Visits

If possible, visit shortlisted factories in person. This allows you to assess production conditions, equipment, and workforce professionalism. Focus on industrial clusters in Shandong, Hebei, and Jiangsu provinces.

应用场景和解决方案

Magnesium sulfate is used in diverse applications, each requiring specific product grades and formulations. Below are common scenarios and tailored solutions.

Agricultural Fertilizer

In agriculture, magnesium sulfate corrects magnesium and sulfur deficiencies in soil, improving crop yield and quality. It is particularly effective for potatoes, tomatoes, and citrus fruits. Solution: Use agricultural-grade magnesium sulfate heptahydrate (MgSO₄·7H₂O) with a purity of at least 98%. Apply as a foliar spray or soil amendment at recommended rates.

Pharmaceutical and Medical Use

Magnesium sulfate is used intravenously to treat preeclampsia and eclampsia in pregnant women, as well as for magnesium deficiency. Solution: Use pharmaceutical-grade magnesium sulfate with USP or EP certification. Ensure sterile packaging and compliance with GMP standards.

Industrial Manufacturing

In industries, magnesium sulfate is used in papermaking, textiles, and fireproofing materials. It acts as a coagulant and flame retardant. Solution: Use industrial-grade anhydrous magnesium sulfate (MgSO₄) with high purity and low moisture content. Customize particle size based on application requirements.

Food and Beverage Processing

As a food additive, magnesium sulfate is used as a firming agent in tofu and as a nutrient supplement in beverages. Solution: Use food-grade magnesium sulfate meeting FCC or E number standards. Ensure it is free from contaminants and heavy metals.

Animal Feed

In animal nutrition, magnesium sulfate prevents magnesium deficiency in livestock, improving growth and health. Solution: Use feed-grade magnesium sulfate with a purity of 99% or higher. Mix with other feed ingredients according to veterinary recommendations.

常见问题（10 个问题）

What is the difference between magnesium sulfate heptahydrate and anhydrous? Heptahydrate contains 7 water molecules and is more soluble, while anhydrous has no water and is more concentrated. Heptahydrate is common in agriculture, while anhydrous is used in industrial applications.
Is magnesium sulfate safe for organic farming? Yes, magnesium sulfate is approved for organic farming by many certification bodies, such as the USDA National Organic Program, when derived from natural sources.
What is the typical shelf life of magnesium sulfate? When stored in a dry, cool environment, magnesium sulfate heptahydrate has a shelf life of 2-3 years, while anhydrous forms can last up to 5 years.
Can magnesium sulfate be used in hydroponics? Yes, it is a common nutrient in hydroponic systems, providing essential magnesium and sulfur for plant growth. Use at a concentration of 100-200 ppm.
What are the packaging options for magnesium sulfate? Common packaging includes 25 kg bags, 50 kg bags, 1-ton jumbo bags, and bulk containers. Custom packaging is also available.
How is magnesium sulfate produced? It is produced by reacting magnesium oxide or magnesium hydroxide with sulfuric acid, or by extracting from natural mineral deposits like kieserite.
What is the HS code for magnesium sulfate? The HS code for magnesium sulfate is 2833.21.00 for most grades, but it may vary by country and specific product form.
Does magnesium sulfate expire? It does not expire in the traditional sense, but it may absorb moisture over time, reducing its effectiveness. Proper storage is key.
Can magnesium sulfate be mixed with other fertilizers? Yes, it is compatible with most fertilizers, but avoid mixing with ammonium phosphate or calcium-based fertilizers to prevent precipitation.
What is the price range for magnesium sulfate? Prices vary by grade and quantity. Agricultural grade typically ranges from $100 to $300 per metric ton, while pharmaceutical grade can be $500 to $1,000 per metric ton.

采购考虑因素

When procuring magnesium sulfate, pay attention to the following aspects to avoid common pitfalls and ensure a smooth transaction.

Contract Terms

Clearly define product specifications, including purity, particle size, moisture content, and grade. Include clauses for quality guarantees, delivery timelines, and penalty for non-compliance.

Incoterms

Choose appropriate Incoterms such as FOB (Free on Board) or CIF (Cost, Insurance, and Freight) to clarify shipping responsibilities and costs. FOB is common for bulk chemical shipments from China.

质量控制

Request a Certificate of Analysis (COA) for each batch. Consider using third-party inspection services to test samples before shipment and upon arrival.

Payment Security

Use secure payment methods like Letter of Credit (L/C) for large orders, or partial upfront payment with balance against shipping documents. Avoid full upfront payments to new suppliers.

监管合规

Ensure the product meets your country’s regulations, such as REACH in Europe or FDA in the US. Ask for relevant safety data sheets (SDS) and import documentation.

产品报价

Below is a sample quotation for magnesium sulfate based on common market prices as of 2025. Prices are indicative and may vary based on order volume, grade, and shipping terms.

产品等级	纯净	包装	Price per Metric Ton (FOB China)
Agricultural Heptahydrate	98% min	25 kg bags	$180 – $250
Industrial Anhydrous	99% min	50 kg bags	$350 – $500
Pharmaceutical Grade	99.5% min	25 kg drums	$600 - $900
食品级	99% min	25 kg bags	$400 – $600
Feed Grade	99% min	25 kg bags	$200 – $350

行业标准

Magnesium sulfate products must comply with various international and regional standards to ensure quality and safety. Below are key standards applicable to different grades.

Agricultural Grade

Standards include ISO 8157 for fertilizers and specific national standards like GB/T 26568-2011 in China. These specify minimum purity of 98% and maximum moisture content of 2%.

Pharmaceutical Grade

Compliance with USP (United States Pharmacopeia) or EP (European Pharmacopoeia) is required. These standards mandate purity above 99.5%, heavy metal limits, and sterility for injectable forms.

食品级

Food-grade magnesium sulfate must meet FCC (Food Chemicals Codex) or EU regulations, including limits on arsenic, lead, and cadmium. Purity should be at least 99%.

工业级

Industrial standards vary by application but generally require high purity and low impurity levels. Common specifications include a minimum of 98% MgSO₄ content and specific particle size distribution.

全球 5 大进出口地区

The trade of magnesium sulfate is concentrated in specific regions that dominate imports and exports. Below are the top 5 regions based on trade volume.

等级	地区	Import Volume (Metric Tons)	Export Volume (Metric Tons)
1	亚太地区（不包括中国）	1,200,000	300,000
2	欧洲	900,000	500,000
3	北美	700,000	200,000
4	拉丁美洲	400,000	100,000
5	Middle East and Africa	300,000	150,000

谷歌搜索商业关键字：10 个常见问题问答

Based on high-volume commercial search terms, here are 10 frequently asked questions with detailed answers to help buyers make informed decisions.

Where can I buy bulk magnesium sulfate for agriculture? You can purchase from Chinese suppliers like Sinochem or Laizhou Laiyu Chemical via Alibaba or direct contracts. Prices start at $180 per metric ton FOB.
What is the best magnesium sulfate grade for hydroponics? Agricultural-grade heptahydrate with 98% purity is ideal for hydroponics. Ensure it is free from anti-caking agents that can clog systems.
How do I verify the quality of magnesium sulfate from China? Request a COA and use third-party labs like SGS for testing. Check for ISO 9001 certification and positive customer reviews.
What is the minimum order quantity for magnesium sulfate? Minimum order quantities vary from 1 metric ton for samples to 20 metric tons for bulk orders. Some suppliers offer smaller quantities for testing.
Can I get a free sample of magnesium sulfate before ordering? Many Chinese suppliers provide free samples, but you may need to pay for shipping. Contact suppliers directly to arrange sample requests.
What are the shipping costs for magnesium sulfate from China to the US? Shipping costs depend on volume and port. A 20-foot container (about 20 metric tons) costs approximately $2,000 to $4,000 for sea freight to the US West Coast.
Is magnesium sulfate safe for organic certification? Yes, if derived from natural sources and processed without synthetic additives. Check for OMRI or equivalent certification.
How long does it take to receive magnesium sulfate from China? Production takes 2-4 weeks, and sea freight takes 3-6 weeks depending on the destination. Total lead time is typically 5-10 weeks.
What payment methods are accepted by Chinese suppliers? Common methods include T/T (wire transfer), L/C (letter of credit), and sometimes PayPal for small orders. T/T with 30% upfront and 70% against documents is standard.
Are there any import duties on magnesium sulfate? Import duties vary by country. In the US, the duty rate is around 3.7% for most grades under HS code 2833.21.00. Check with local customs for exact rates.

海关数据和关税税率

Understanding customs data and tariff rates is crucial for budgeting and compliance when importing magnesium sulfate. Below is a summary of key information.

HS Code Classification

The primary HS code for magnesium sulfate is 2833.21.00, covering sulfates of magnesium. Some countries may have sub-codes for specific grades, such as 2833.21.10 for agricultural use.

Tariff Rates by Region

地区	费率	说明
美国	3.7%	Duty-free under certain trade agreements
欧洲联盟	5.5%	Reduced rates for some countries
印度	7.5%	Additional GST applies
巴西	8.0%	Import tax plus state taxes
日本	3.0%	Preferential rates for WTO members

Trade Volume Data

In 2024, global trade volume for magnesium sulfate exceeded 4 million metric tons, with China accounting for over 60% of exports. Major importing countries include the US, India, and Brazil.

为什么选择中小型工厂？与大型工厂的区别

Choosing between small and medium-sized factories versus large-scale producers involves trade-offs. Understanding these differences helps buyers make optimal decisions.

中小型工厂的优势

Small and medium factories often offer more flexibility in custom orders, such as specialized packaging or unique product formulations. They may provide lower minimum order quantities (MOQs) and faster response times. Additionally, they can be more willing to negotiate pricing and terms.

大型工厂的优势

Large factories benefit from economies of scale, resulting in lower per-unit costs for bulk orders. They typically have more robust quality control systems and certifications, ensuring consistent product quality. Their supply chains are more resilient, reducing the risk of delays.

Key Differences

系数	小型/中型工厂	大型工厂
订购数量	1-10 metric tons	20-100 metric tons
Price per Ton	Higher (10-20% premium)	Lower
定制	High flexibility	Limited
准备时间	2-4 weeks	4-8 weeks
认证	Basic (ISO 9001)	Advanced (GMP, USP)

2026 年主要媒体新闻摘要

Based on projections and trends reported by major media and industry analysts, here are key developments expected in 2026 for the magnesium sulfate market.

Market Growth Forecast

According to a report by Grand View Research published in 2024, the global magnesium sulfate market is projected to reach $2.8 billion by 2026, growing at a CAGR of 4.2% from 2024. This growth is driven by increasing demand in agriculture and pharmaceuticals.

New Production Facilities

In 2026, Sinochem Group is expected to commission a new 500,000 metric ton magnesium sulfate plant in Shandong Province, China, as reported by Chemical Weekly. This expansion aims to meet rising export demand.

Regulatory Changes

The European Commission is anticipated to update REACH regulations for magnesium sulfate in 2026, requiring stricter impurity limits for agricultural imports, as noted by European Chemical News. This may impact suppliers from non-EU countries.

Sustainability Initiatives

Compass Minerals announced in a 2025 press release that it will invest $50 million in carbon-neutral production processes for magnesium sulfate by 2026, aligning with global net-zero goals.

Market Dynamics

According to a 2025 analysis by ICIS, magnesium sulfate prices are expected to stabilize in 2026 after a period of volatility, with agricultural grades averaging $200-$250 per metric ton due to balanced supply and demand.

2026 年市场核心数据概览

Below is a snapshot of key market data for magnesium sulfate in 2026, based on industry forecasts and historical trends.

公制	价值	资料来源
全球市场规模	$28 亿美元	大观园研究中心
Annual Growth Rate (CAGR)	4.2%	大观园研究中心
Total Production Volume	5.5 million metric tons	Industry Estimates
China Export Share	62%	China Customs Data
Average Price (Agricultural Grade)	$220 per metric ton	ICIS
顶级应用领域	Agriculture (55%)	Market Analysis
Key Importing Region	Asia-Pacific (30%)	Trade Data

客户和市场痛点

Understanding the challenges faced by buyers and the market helps suppliers tailor their offerings. Below are common pain points in the magnesium sulfate industry.

质量不一致

Many buyers report variations in purity and moisture content between batches from the same supplier. This is especially problematic for pharmaceutical and food applications where strict specifications are required.

供应链中断

Logistical delays, port congestion, and raw material shortages can disrupt supply. For example, in 2024, port strikes in China led to a 20% increase in lead times for magnesium sulfate exports.

价格波动

Raw material costs, particularly sulfuric acid and magnesium oxide, fluctuate with global market conditions. This makes budgeting difficult for long-term contracts.

监管合规的复杂性

Navigating different import regulations across countries is challenging. Buyers often struggle with documentation, tariffs, and certification requirements, leading to customs delays and additional costs.

Lack of Transparency

Some suppliers provide incomplete or inaccurate product information, such as missing COAs or vague sourcing details. This erodes trust and increases risk for buyers.

Limited Customization Options

Large factories often resist custom orders, forcing buyers to accept standard products that may not meet specific application needs. Small factories offer more flexibility but may lack quality consistency.