What is Sodium Sulphate Anhydrous? Uses, Quality Standards & Buying Guide

2026-09-01

Sodium sulphate anhydrous (SSA, Na₂SO₄) is a white crystalline powder and one of the most widely used basic inorganic chemicals. As the anhydrous form of sodium sulphate, it contains no crystal water, which makes it purer, more stable in storage and cheaper to transport than Glauber's salt (sodium sulphate decahydrate). It is an essential raw material for many downstream industries.

1. Main Applications of Sodium Sulphate Anhydrous

• Paper making: used as a cooking aid in the kraft process to improve pulp yield;

• Textile dyeing: used as a leveling/exhaustion agent for more even dye uptake;

• Synthetic detergents: used as a filler to improve powder flow and cleaning performance;

• Glass manufacturing: used as a fining agent to lower melting temperature and save energy;

• Mineral processing: used as a depressant in flotation;

• Leather tanning, pharmaceuticals, cement additives and other chemical industries.

In short, SSA is a fundamental raw material wherever process conditions need to be optimized and costs reduced.

2. Quality Standards

In China, sodium sulphate anhydrous is governed by national standard GB/T6009-2014. Key specifications include: Na₂SO₄ content (≥99% for Class I, Grade 1), water insolubles, chlorides, iron content, whiteness and moisture. Buyers are advised to request batch certificates and pay special attention to Na₂SO₄ content and whiteness.

3. Buying Tips

1. Check the supplier's background: captive mine resources and annual capacity determine supply stability and cost advantage;

1. Check consistency: request batch test reports to avoid quality fluctuation;

1. Check packaging: commonly 50kg bags or jumbo bags; special packaging for export;

1. Check logistics: a closer origin with better logistics means lower landed cost and shorter lead time.

Sichuan Shenhong Chemical Industry Co., Ltd. owns 3 mirabilite mines with about 500 million tons of reserves and an annual SSA capacity of 300,000 tons. Our product meets GB/T6009-2014 Class I Grade 1 standard and is exported to more than 30 countries across Europe, America, the Middle East and Southeast Asia.

For quotation or samples, please contact our International Trade Department: Ms. monica, +86 15828056148.