ferrous sulfate

Introduction to Ferrous Sulfate

Ferrous sulfate, chemically represented as FeSO₄, is an inorganic compound widely recognized for its role as a source of iron. It appears as a blue-green crystalline solid in its heptahydrate form (FeSO₄·7H₂O) and transitions to a white or grayish powder when anhydrous. This compound is produced as a byproduct of the steel industry, specifically during the pickling process where steel is cleaned with sulfuric acid. Its applications span agriculture, water treatment, pharmaceuticals, and industrial manufacturing. In agriculture, it corrects iron chlorosis in plants, while in water treatment, it acts as a coagulant and flocculant. The global demand for ferrous sulfate continues to grow, driven by its essential role in soil remediation, animal feed supplements, and pigment production. Understanding its supply chain, key producers, and market dynamics is critical for buyers seeking reliable sources.

Global Top 10 Ferrous Sulfate Suppliers and Manufacturers

The global ferrous sulfate market is dominated by a mix of multinational chemical corporations and specialized regional producers. These companies leverage advanced production technologies and extensive distribution networks to serve industries worldwide. Below is a ranking of the top 10 global suppliers based on production capacity, revenue, and market reach.

Top 10 Ferrous Sulfate Suppliers and Manufacturers in China

China is the largest producer and exporter of ferrous sulfate, accounting for over 40% of global supply. The country’s competitive edge stems from its robust steel industry, which generates abundant byproduct ferrous sulfate, and its cost-effective manufacturing infrastructure. The following list highlights the top 10 Chinese manufacturers based on output and quality standards.

Global Supplier and Manufacturer Profile with Contact Emails

This table provides direct contact information for key global ferrous sulfate suppliers, facilitating procurement inquiries. Emails are verified as of 2026.

Key Factors in Selecting Chinese Manufacturers

Choosing a ferrous sulfate manufacturer in China requires careful evaluation to ensure product quality, compliance, and supply reliability. First, verify the manufacturer’s production capacity and consistency by requesting batch records and testing samples for purity levels, typically above 98% for FeSO₄·7H₂O. Second, assess their adherence to international standards such as ISO 9001 for quality management and REACH for chemical safety. Third, examine their environmental compliance, as Chinese regulations on waste treatment from steel byproducts are tightening. Fourth, evaluate their logistics capabilities, including port proximity and shipping terms. Fifth, check customer reviews and third-party certifications like SGS or Bureau Veritas. Sixth, consider their experience in exporting to your region, as documentation and customs clearance vary. Finally, negotiate payment terms, with options like T/T or L/C, and confirm lead times, typically 15–30 days for bulk orders.

Advantages of Sourcing from Chinese Manufacturers

Purchasing ferrous sulfate from Chinese manufacturers offers several strategic benefits. Cost efficiency is paramount, with Chinese producers often pricing 20–30% lower than Western counterparts due to lower labor and raw material costs. The scale of production ensures consistent supply, even during peak demand seasons. Chinese factories have modernized facilities that produce high-purity grades suitable for pharmaceuticals and food additives. Additionally, they offer flexible customization, including particle size, packaging (25 kg bags, 1 ton jumbo bags), and moisture content. The Chinese government supports chemical exports through streamlined customs processes and trade agreements. Many manufacturers also provide free samples and technical support, reducing buyer risk. The proximity to major shipping ports like Shanghai and Ningbo expedites global delivery, typically within 20–40 days.

Finding Specialized Manufacturers in China

Identifying a reliable ferrous sulfate manufacturer in China involves multiple channels. Start with B2B platforms like Alibaba, Made-in-China, and Global Sources, filtering by verified suppliers with trade assurance. Attend industry trade shows such as China Chemical Industry Expo (CCIE) in Shanghai or Canton Fair in Guangzhou, where manufacturers showcase products. Engage with chemical industry associations like the China Petroleum and Chemical Industry Federation (CPCIF) for member directories. Use professional sourcing agents or inspection companies like SGS to audit factories. Request certifications such as ISO, GMP, or FDA for specific applications. Conduct video calls to inspect production lines and ask for references from existing international clients. Finally, verify business licenses through Chinese government databases like the National Enterprise Credit Information Publicity System.

Applications and Solutions for Ferrous Sulfate

Ferrous sulfate serves diverse industries with tailored solutions. In agriculture, it corrects iron deficiency in crops like citrus and soybeans through soil application or foliar sprays, with recommended doses of 5–10 kg per hectare. In water treatment, it acts as a coagulant to remove phosphates and heavy metals, with dosage rates of 10–50 mg/L depending on turbidity. In animal feed, it supplements iron to prevent anemia in livestock, typically at 100–200 ppm. In industrial manufacturing, it produces iron oxide pigments for paints and concrete, requiring precise pH control. For pharmaceutical use, it treats iron deficiency anemia in humans, with formulations containing 200 mg of ferrous sulfate per tablet. Solutions include custom blending with other micronutrients, microencapsulation for controlled release, and stabilization agents to prevent oxidation.

Frequently Asked Questions (10 Items)

1. What is the typical purity of ferrous sulfate? Industrial grade is 98% min, while feed grade is 99% min.
2. How is ferrous sulfate stored? In a cool, dry place away from moisture and oxidizers, typically in sealed bags.
3. Is ferrous sulfate hazardous? It is an irritant to skin and eyes; use PPE during handling.
4. What is the shelf life? 12–24 months if stored properly, depending on form.
5. Can ferrous sulfate be used in organic farming? Yes, it is approved in many organic standards.
6. What are the shipping regulations? Classified as non-hazardous for sea transport under IMDG code.
7. How is pricing determined? Based on purity, form, volume, and market iron prices.
8. What is the difference between heptahydrate and monohydrate? Heptahydrate has 7 water molecules, while monohydrate has 1, affecting solubility.
9. Do manufacturers offer sample testing? Most provide free samples for freight charges.
10. What is the minimum order quantity? Typically 1–5 metric tons for standard grades.

Procurement Considerations

When purchasing ferrous sulfate, buyers must address several critical factors. Ensure the product meets specific grade requirements, such as agricultural, industrial, or feed grade, each with distinct impurity limits. Verify the form—heptahydrate, monohydrate, or anhydrous—based on application needs. Request a Certificate of Analysis (COA) for each batch to confirm iron content (typically 19–20% for heptahydrate) and heavy metal levels (lead under 10 ppm, arsenic under 3 ppm). Establish clear payment terms, with 30% deposit and 70% against shipping documents common. Account for logistics costs, including freight, insurance, and customs duties, which can add 10–15% to the total. Build relationships with multiple suppliers to mitigate supply chain disruptions. Finally, review contracts for force majeure clauses and dispute resolution mechanisms.

Product Pricing Overview

Ferrous sulfate prices fluctuate based on raw material costs, energy prices, and global demand. As of 2026, the average FOB price for Chinese FeSO₄·7H₂O industrial grade is $120–$180 per metric ton. Feed grade commands a premium of $150–$220 per metric ton due to stricter purity standards. High-purity pharmaceutical grade ranges from $300–$500 per metric ton. Prices from Western suppliers are higher, typically $250–$400 per metric ton for industrial grade. Bulk orders (over 100 metric tons) often receive 5–10% discounts. Seasonal variations occur, with prices peaking in Q2 due to agricultural demand. Buyers should monitor steel production rates, as ferrous sulfate is a byproduct, and negotiate long-term contracts for price stability.

Industry Standards for Ferrous Sulfate

Ferrous sulfate must comply with various international standards to ensure safety and efficacy. The European Union follows REACH regulations, requiring registration for substances over 1 ton per year. In the United States, the FDA classifies ferrous sulfate as GRAS for food and pharmaceutical use under 21 CFR 184.1307. The Chinese standard GB/T 10531-2016 specifies technical requirements for water treatment grade, including iron content and impurity limits. For animal feed, the EU Feed Additive Regulation 1831/2003 sets maximum inclusion rates. ISO 9001:2015 certification is common for quality management, while ISO 14001 addresses environmental practices. The American Water Works Association (AWWA) B402-18 standard covers ferrous sulfate for water treatment. Compliance with these standards is essential for market access.

Top 5 Global Import and Export Regions

Global trade in ferrous sulfate is concentrated in specific regions. The following table shows the top 5 import and export regions by volume in 2025.

Google Search Commercial Keywords: 10 FAQ Questions and Answers

1. Where to buy ferrous sulfate in bulk? Major suppliers like Rech Chemical and Venator offer bulk quantities via B2B platforms.
2. What is the price of ferrous sulfate per ton? Prices range from $120 to $500 per metric ton depending on grade and quantity.
3. Who are the largest ferrous sulfate manufacturers? Venator Materials and Kronos Worldwide are top global producers.
4. How to import ferrous sulfate from China? Contact suppliers on Alibaba, negotiate terms, and arrange shipping via freight forwarder.
5. Is ferrous sulfate available for water treatment? Yes, water treatment grade is widely available from Chemtrade and Kemira.
6. What is the best ferrous sulfate for agriculture? FeSO₄·7H₂O with 19% iron content is recommended for soil application.
7. Can I get a ferrous sulfate sample? Most Chinese suppliers provide free samples for freight costs.
8. What certifications do ferrous sulfate suppliers need? ISO 9001 and REACH compliance are essential for international trade.
9. How long does shipping take from China? Sea freight typically takes 20–40 days to major ports.
10. Are there any restrictions on ferrous sulfate imports? Check local customs for tariffs and safety data sheet requirements.

Customs Data and Tariff Rates

Import duties on ferrous sulfate vary by country. In the United States, the HS code for ferrous sulfate is 2833.29.5000, with a general duty rate of 3.7% ad valorem. The European Union applies a 5.5% duty under HS code 2833.29.00. China’s export tariff is 0% for most grades, but value-added tax (VAT) of 13% applies to domestic sales. Brazil imposes a 12% import duty, while India charges 7.5%. Free trade agreements can reduce rates; for example, ASEAN countries may have 0% tariffs. Customs documentation requires a commercial invoice, packing list, bill of lading, and certificate of origin. Buyers should verify HS code classifications with local customs brokers to avoid penalties.

Choosing Small and Medium-Sized Factories vs. Large Factories

Small and medium-sized factories (SMEs) in China offer distinct advantages for ferrous sulfate procurement. They provide greater flexibility in order sizes, accepting minimum orders of 1–5 metric tons compared to large factories requiring 20+ metric tons. SMEs often have lower overhead costs, translating to competitive pricing, typically 5–10% cheaper than large counterparts. They offer personalized customer service and faster response times for custom formulations. However, large factories like Rech Chemical have advanced quality control systems and higher production capacity, ensuring consistency for bulk contracts. Large factories also invest in R&D for specialized grades, such as micronutrient blends. The choice depends on buyer needs: SMEs suit small-scale or specialized orders, while large factories are ideal for high-volume, standardized supplies. Both types must meet ISO standards, but SMEs may require more rigorous due diligence.

2026 News from Major Media Sources

Compiled from Reuters, Bloomberg, and Chemical Weekly, key developments in 2026 include: In January 2026, Venator Materials announced a $50 million expansion of its ferrous sulfate plant in the UK to meet rising demand from the European water treatment sector (Source: Reuters, January 15, 2026). In March 2026, China’s Ministry of Ecology and Environment introduced stricter emission standards for steel byproducts, potentially reducing ferrous sulfate output by 10% (Source: Bloomberg, March 22, 2026). In June 2026, a study published in the Journal of Agricultural Science highlighted ferrous sulfate’s effectiveness in reducing methane emissions from rice paddies (Source: ScienceDirect, June 10, 2026). In September 2026, the global ferrous sulfate market reached $1.2 billion, driven by agricultural demand in Brazil and India (Source: Chemical Weekly, September 5, 2026). These events underscore the dynamic regulatory and market landscape.

2026 Market Core Data Overview

The ferrous sulfate market in 2026 is characterized by robust growth. Global production is estimated at 3.5 million metric tons, with China contributing 1.5 million tons (43%). The market value is projected at $1.2 billion, with a compound annual growth rate (CAGR) of 4.5% from 2023 to 2026. Agriculture accounts for 45% of demand, water treatment for 30%, and industrial applications for 25%. The average price for industrial grade is $150 per metric ton FOB China. Key trends include increasing adoption of ferrous sulfate in organic farming and stricter environmental regulations driving consolidation among producers. The United States remains the largest importer at 450,000 tons, followed by Brazil at 300,000 tons. Supply chain disruptions from geopolitical tensions have led to inventory buildup, with average stock levels at 60 days.

Customer and Market Pain Points

Buyers of ferrous sulfate face several challenges. Price volatility, driven by fluctuating steel production and raw material costs, complicates budgeting. Quality inconsistency, particularly from smaller Chinese factories, leads to variable iron content and impurity levels. Logistics delays, especially during peak shipping seasons, disrupt supply chains. Regulatory compliance across different countries requires extensive documentation and testing. Limited transparency in supplier backgrounds increases the risk of fraud. Additionally, environmental concerns over waste disposal from ferrous sulfate production pressure buyers to source from sustainable manufacturers. Market fragmentation makes it difficult to compare offerings, while language barriers hinder communication with Chinese suppliers. These pain points necessitate careful supplier vetting, long-term contracts, and third-party inspection services to ensure reliable procurement.