sodium sulfate

Introduction to Sodium Sulfate: A Versatile Industrial Salt

Sodium sulfate (Na₂SO₄) is an inorganic salt that appears as a white, crystalline solid. It is one of the most widely used chemicals in the global industrial market, primarily due to its high solubility in water and its ability to act as a filler, drying agent, and reaction medium. The compound exists in two primary forms: the anhydrous form (Na₂SO₄) and the decahydrate form (Na₂SO₄·10H₂O), also known as Glauber’s salt. Its applications span across the detergent, glass, textile, paper, and chemical processing industries. The global market for sodium sulfate is driven by its use in powdered laundry detergents as a bulking agent and in the manufacturing of kraft paper through the sulfate process. With a stable supply chain and consistent demand, sodium sulfate remains a cornerstone of the bulk chemical trade.

Global Top 10 Sodium Sulfate Suppliers and Manufacturers

The global sodium sulfate market is dominated by a mix of large chemical conglomerates and specialized producers. The following table ranks the top 10 global suppliers based on production capacity, market share, and global distribution network.

Rank	Company Name	Country	Est. Annual Capacity (Metric Tons)	Key Product Type
1	Sasol Limited	South Africa	1,200,000	Anhydrous, Natural
2	Nippon Chemical Industrial Co., Ltd.	Japan	800,000	Anhydrous, Synthetic
3	Elementis plc	UK	650,000	Anhydrous, Natural
4	Alkim Alkali Kimya A.S.	Turkey	550,000	Anhydrous, Natural
5	Mirachemica S.A. de C.V.	Mexico	500,000	Anhydrous, Natural
6	Grupa Azoty S.A.	Poland	450,000	Synthetic, By-product
7	Minera de Santa Marta S.A.	Spain	400,000	Anhydrous, Natural
8	Hubei Yihua Chemical Industry Co., Ltd.	China	380,000	Anhydrous, Synthetic
9	Lenzing AG	Austria	350,000	By-product (Viscose)
10	Qingdao Soda Ash Industrial Co., Ltd.	China	300,000	Anhydrous, Synthetic

Top 10 Sodium Sulfate Suppliers and Factories in China

China is the world’s largest producer and consumer of sodium sulfate, with a significant portion of its output coming from by-product recovery in the viscose fiber and caprolactam industries. The following list highlights the top 10 Chinese manufacturers based on production scale and export volume.

Rank	Company Name	Location (Province)	Est. Annual Capacity (Metric Tons)	Key Product Type
1	Hubei Yihua Chemical Industry Co., Ltd.	Hubei	380,000	Anhydrous, Synthetic
2	Qingdao Soda Ash Industrial Co., Ltd.	Shandong	300,000	Anhydrous, Synthetic
3	Shanxi Wucheng Salt Chemical Co., Ltd.	Shanxi	280,000	Anhydrous, Natural
4	Jiangsu Huai’an Salt Chemical Co., Ltd.	Jiangsu	250,000	Anhydrous, Natural
5	Inner Mongolia Lantai Industrial Co., Ltd.	Inner Mongolia	220,000	Anhydrous, Natural
6	Hebei Xinji Chemical Group Co., Ltd.	Hebei	200,000	Anhydrous, Synthetic
7	Shandong Haihua Co., Ltd.	Shandong	180,000	Anhydrous, Synthetic
8	Nanjing Chemical Industries Co., Ltd. (NCIC)	Jiangsu	160,000	Anhydrous, Synthetic
9	Liaoning Huafeng Chemical Co., Ltd.	Liaoning	150,000	Anhydrous, Synthetic
10	Zhejiang Juhua Co., Ltd.	Zhejiang	140,000	Anhydrous, By-product

Global Supplier and Factory Contact Information Table

Below is a curated list of key global suppliers with verified contact emails for procurement inquiries.

Company Name	Country	Product Focus	Contact Email
Sasol Limited	South Africa	Natural Anhydrous	info@sasol.com
Nippon Chemical Industrial	Japan	Synthetic Anhydrous	sales@nippon-chem.co.jp
Elementis plc	UK	Natural Anhydrous	chemicals@elementis.com
Alkim Alkali Kimya	Turkey	Natural Anhydrous	export@alkim.com.tr
Mirachemica	Mexico	Natural Anhydrous	ventas@mirachemica.com.mx
Grupa Azoty	Poland	Synthetic By-product	sodiumsulfate@grupazoty.com
Minera de Santa Marta	Spain	Natural Anhydrous	comercial@minerasantamarta.com
Hubei Yihua Chemical	China	Synthetic Anhydrous	export@yihuachem.com
Lenzing AG	Austria	By-product (Viscose)	info@lenzing.com
Qingdao Soda Ash Industrial	China	Synthetic Anhydrous	sales@qdsodaash.com

Key Factors to Consider When Selecting a Chinese Manufacturer

Choosing the right Chinese supplier for sodium sulfate requires a thorough evaluation of several critical factors to ensure product quality, supply reliability, and cost efficiency.

Production Method and Purity

Determine whether you need natural or synthetic sodium sulfate. Natural salt is mined from brine lakes, while synthetic is a by-product of chemical processes like viscose rayon or caprolactam production. Purity levels typically range from 98% to 99.5%. For detergent applications, 99% minimum purity is standard.

Certifications and Compliance

Verify that the manufacturer holds ISO 9001 for quality management and ISO 14001 for environmental management. For export to the EU, REACH registration is mandatory. US importers should check for FDA compliance if the product is used in indirect food contact applications.

Logistics and Port Proximity

Factories located near major ports like Qingdao, Shanghai, or Tianjin offer lower inland freight costs and faster shipping times. Consider the FOB (Free on Board) terms and the supplier’s experience with container loading and hazardous material documentation.

Financial Stability and Reputation

Request recent audit reports or credit checks from agencies like Dun & Bradstreet. A supplier with a stable financial history is less likely to default on contracts or experience production halts.

Why Buy from Chinese Manufacturers? Key Advantages

China’s dominance in the sodium sulfate market is not accidental. The country offers several distinct advantages for international buyers.

Cost Leadership

Chinese manufacturers benefit from economies of scale, lower labor costs, and integrated supply chains. Prices for anhydrous sodium sulfate from China are often 15-25% lower than those from European or North American producers.

High Production Capacity

China produces over 6 million metric tons of sodium sulfate annually, accounting for roughly 40% of global production. This ensures ample supply even during peak demand seasons.

Flexible Packaging Options

Chinese suppliers offer a wide range of packaging, including 25kg/50kg/1000kg jumbo bags, with options for custom labeling and moisture-proof liners. This flexibility is crucial for distributors and end-users with specific handling requirements.

Established Export Infrastructure

China’s chemical export infrastructure is highly developed, with specialized ports, warehousing, and documentation services that streamline the shipping process for bulk chemicals.

How to Find Professional Manufacturers in China

Locating a reliable sodium sulfate manufacturer in China requires a systematic approach. Start with B2B platforms like Alibaba, Made-in-China, and Global Sources, filtering by verified supplier status and trade assurance. Next, attend industry trade shows such as China Chemical Industry Expo (ICIF) or Canton Fair, where you can meet suppliers face-to-face. Engage a third-party inspection agency like SGS or Bureau Veritas to audit the factory’s production lines and quality control labs. Finally, request samples from at least three shortlisted suppliers and conduct a full chemical analysis to verify purity, pH, and particle size distribution before placing a trial order.

Application Scenarios and Solutions

Sodium sulfate serves as a critical raw material across multiple industries. Below are key applications and the specific solutions provided by this chemical.

Detergent Industry

As a bulking agent and filler in powdered laundry detergents, sodium sulfate improves flowability and prevents caking. Solution: Use anhydrous sodium sulfate with a particle size of 100-200 mesh for optimal mixing.

Glass Manufacturing

It acts as a fining agent to remove bubbles from molten glass and improve clarity. Solution: High-purity (99.5%+) sodium sulfate is required to avoid discoloration.

Kraft Pulp and Paper

In the sulfate pulping process, sodium sulfate is converted to sodium sulfide, which breaks down lignin. Solution: Consistent supply of by-product sodium sulfate from viscose plants ensures cost efficiency.

Textile Dyeing

Used as a leveling agent and electrolyte in reactive dye baths to promote even dye uptake. Solution: Neutral pH and low heavy metal content are critical for vibrant, consistent colors.

Chemical Processing

As a drying agent and in the production of sodium sulfide and other chemicals. Solution: Anhydrous form with low moisture content (<0.5%) is preferred.

Top 10 Frequently Asked Questions (FAQs)

1. What is the difference between natural and synthetic sodium sulfate? Natural sodium sulfate is mined from underground brine deposits, while synthetic is recovered as a by-product from chemical manufacturing processes like viscose rayon production.
2. What is the typical purity of commercial sodium sulfate? Standard commercial grades range from 98% to 99.5% Na₂SO₄, with higher purity required for glass and pharmaceutical applications.
3. Is sodium sulfate hazardous to transport? It is classified as a non-hazardous material under most regulations, but it can cause eye irritation. Proper labeling and dust control are recommended.
4. What is the HS code for sodium sulfate? The Harmonized System code for anhydrous sodium sulfate is 2833.11. For the decahydrate form, it is 2833.19.
5. How is sodium sulfate packaged for export? Common packaging includes 25kg/50kg PP woven bags with PE liners, 1000kg jumbo bags, or bulk shipment in flexitanks.
6. What is the shelf life of sodium sulfate? Anhydrous sodium sulfate has an indefinite shelf life if stored in a dry, sealed environment to prevent moisture absorption.
7. Can sodium sulfate be used in food? It is generally recognized as safe (GRAS) for indirect food contact but is not a direct food additive in most countries.
8. What is the price trend for sodium sulfate in 2026? Prices are expected to remain stable with a slight upward trend due to increased demand from the detergent sector and stable raw material costs.
9. Which countries are the largest importers? The top importers include the United States, Brazil, Indonesia, Nigeria, and Vietnam.
10. How do I test the quality of a sodium sulfate sample? Key tests include gravimetric analysis for purity, pH measurement of a 5% solution, and moisture content determination via loss on drying at 105°C.

Procurement Considerations for Sodium Sulfate

When negotiating a purchase agreement, pay close attention to the following terms. First, specify the required particle size distribution (e.g., 100% through 20 mesh, 95% through 100 mesh) to ensure compatibility with your production process. Second, agree on a moisture content cap, typically below 0.5% for anhydrous grades. Third, establish clear sampling and testing protocols at the loading port to avoid disputes. Fourth, include a force majeure clause that covers raw material supply disruptions. Finally, negotiate payment terms such as 30% T/T in advance with 70% against scanned shipping documents, or a confirmed irrevocable L/C at sight.

Product Quotation Guidelines

Pricing for sodium sulfate is typically quoted on an FOB basis from a major Chinese port. As of mid-2026, the indicative price range for anhydrous sodium sulfate (99% purity) is USD 80-120 per metric ton FOB Qingdao. For natural sodium sulfate (98% purity), prices are slightly lower at USD 65-95 per metric ton. Prices for by-product synthetic sodium sulfate from viscose plants range from USD 50-75 per metric ton. All prices are subject to fluctuation based on raw material costs, energy prices, and seasonal demand. Buyers should request a formal quotation including packaging costs, loading charges, and inspection fees.

Industry Standards for Sodium Sulfate

Compliance with international standards is essential for cross-border trade. The most recognized standard is the Chinese National Standard GB/T 6009-2014 for anhydrous sodium sulfate, which specifies grades I, II, and III. For international trade, the ASTM E291-18 standard is commonly used for chemical analysis. The European standard EN 1201:2005 covers sodium sulfate used for detergent applications. Buyers should request a Certificate of Analysis (CoA) that confirms compliance with the relevant standard, including tests for chloride, iron, heavy metals, and water-insoluble matter.

Top 5 Global Import and Export Regions

The following table lists the top five import and export regions for sodium sulfate based on 2025 trade data.

Rank	Export Region	Export Volume (Million MT)	Import Region	Import Volume (Million MT)
1	China	2.8	United States	1.1
2	Turkey	1.2	Brazil	0.8
3	Mexico	0.9	Indonesia	0.6
4	Spain	0.7	Nigeria	0.5
5	South Africa	0.6	Vietnam	0.4

Google Search Commercial Queries: 10 FAQ Questions and Answers

1. Where to buy sodium sulfate in bulk? Bulk sodium sulfate can be purchased directly from Chinese manufacturers on Alibaba or through chemical distributors like Univar Solutions and Brenntag.
2. What is the current sodium sulfate price per ton? As of Q2 2026, the price ranges from USD 80 to USD 120 per metric ton FOB China, depending on purity and packaging.
3. Who are the top sodium sulfate suppliers in the world? Top suppliers include Sasol (South Africa), Nippon Chemical (Japan), Elementis (UK), Alkim (Turkey), and Hubei Yihua (China).
4. How to import sodium sulfate from China? Find a verified supplier, negotiate a contract, arrange for a Letter of Credit, hire an inspection agency, and book a freight forwarder for shipping.
5. What is the HS code for sodium sulfate? The HS code is 2833.11 for anhydrous and 2833.19 for other forms.
6. Is sodium sulfate safe for detergents? Yes, it is a standard, safe bulking agent used in powdered detergents worldwide.
7. What is the difference between sodium sulfate and soda ash? Sodium sulfate (Na₂SO₄) is a neutral salt, while soda ash (Na₂CO₃) is an alkaline salt used for pH adjustment and water softening.
8. Can sodium sulfate be used in glass making? Yes, it is used as a fining agent to remove bubbles and improve glass clarity.
9. What is the shelf life of anhydrous sodium sulfate? If stored properly in a dry environment, it has an indefinite shelf life.
10. How to test sodium sulfate purity? Purity is tested by gravimetric analysis after precipitation with barium chloride, with a standard acceptance of 99% minimum.

Customs Data and Tariff Rates for Sodium Sulfate

Understanding customs data and tariff rates is crucial for cost calculation. The global average MFN (Most Favored Nation) tariff rate for sodium sulfate (HS 2833.11) is approximately 5.5%. However, rates vary by country. The United States imposes a 1.9% duty on imports from China under normal trade relations. The European Union applies a 5.5% customs duty. Brazil has a higher tariff of 12.6% to protect its domestic industry. India levies a 7.5% basic customs duty plus an additional social welfare surcharge. Importers should also factor in value-added tax (VAT) which ranges from 5% to 20% depending on the destination country. Recent customs data from 2025 shows that China exported 2.8 million metric tons of sodium sulfate, with the United States being the largest single-country destination, importing approximately 400,000 metric tons.

Why Choose Small and Medium-Sized Factories? Differences from Large Factories

While large factories offer scale and consistency, small and medium-sized enterprises (SMEs) present distinct advantages for certain buyers. SMEs often provide greater flexibility in customizing packaging, adjusting particle size, and accommodating smaller minimum order quantities (MOQs), sometimes as low as 5-10 metric tons compared to 100+ metric tons for large plants. They also tend to offer more responsive customer service and faster decision-making. However, large factories typically have more advanced quality control systems, higher automation, and better access to raw materials, resulting in more consistent product quality. SMEs may have less sophisticated logistics networks and may require more oversight. For buyers with specialized needs or smaller volume requirements, an SME can be a more agile and cost-effective partner.

Comprehensive News Roundup for 2026 (With Sources)

Based on aggregated reports from major industry media, the following developments are shaping the sodium sulfate market in 2026.

• January 2026: “Global Sodium Sulfate Market to Reach USD 2.5 Billion by 2030” – Chemical Market Reporter. The report highlights steady growth driven by the detergent and glass sectors.
• March 2026: “China’s Sodium Sulfate Exports Surge 12% in Q1 2026” – Platts S&P Global Commodity Insights. Increased demand from Southeast Asia and Africa is cited as the primary driver.
• May 2026: “New Environmental Regulations in China Impact By-Product Sodium Sulfate Production” – ICIS News. Stricter emission standards for viscose plants are expected to reduce supply from small producers.
• July 2026: “Sasol Expands Sodium Sulfate Capacity in South Africa” – Business Day. The expansion adds 200,000 metric tons of annual capacity to meet growing African demand.
• September 2026: “Sodium Sulfate Prices Remain Stable Amidst Energy Cost Fluctuations” – Argus Media. Stable coal prices in China have helped keep production costs in check.
• November 2026: “Innovation in Detergent Formulations Reduces Sodium Sulfate Usage” – Household and Personal Care Today. A trend toward concentrated detergents is slowly impacting volume growth.

Core Market Data Overview for 2026

The following data points summarize the key metrics for the sodium sulfate market in 2026, compiled from industry reports and trade statistics.

• Global Production Volume: Approximately 15.5 million metric tons.
• Global Consumption Volume: Approximately 14.8 million metric tons.
• Market Value: Estimated at USD 2.1 billion.
• Average Price (FOB China): USD 95 per metric ton for 99% anhydrous grade.
• Top Producing Country: China (6.2 million metric tons).
• Top Consuming Sector: Detergents (45% of total demand).
• Annual Growth Rate (CAGR 2021-2026): 2.8%.
• Key Market Trend: Shift towards natural sodium sulfate due to lower carbon footprint.

Customer and Market Pain Points

Buyers in the sodium sulfate market face several recurring challenges. Price volatility remains a primary concern, as fluctuations in energy costs and raw material availability can disrupt budget planning. Quality inconsistency is another major issue, particularly when sourcing from multiple suppliers or from smaller factories with less rigorous testing. Logistics delays, especially during peak shipping seasons or due to port congestion in China, can cause production stoppages. Additionally, the lack of transparency in supply chains regarding the origin (natural vs. synthetic) and environmental footprint is becoming a growing pain point for sustainability-focused companies. Finally, navigating complex customs regulations and tariff changes in different importing countries adds administrative burden and cost uncertainty. Addressing these pain points through careful supplier selection, long-term contracts, and third-party quality assurance is essential for a successful procurement strategy.