Sodium Sulphate CAS 7757-82-6 Powder Granular

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Sodium Sulphate CAS 7757-82-6 powder granular

Sodium Sulphate is a widely used inorganic compound with stable chemical properties and diverse industrial applications. It is also known by various aliases, including anhydrous sodium sulfate, Glauber's salt (for decahydrate form), sal mirabilis, mirabilite (decahydrate mineral), thenardite (anhydrous mineral), sulfuric acid sodium salt (1:2), and disodium sulfate. The chemical formula of Sodium Sulphate is , and its CAS number is 7757-82-6 (anhydrous form); the decahydrate form has a CAS number of 7727-73-3, but the anhydrous form is the most commonly traded type in the global market.

Product Properties & Physical Characteristics

Sodium Sulphate is mainly available in two common forms: anhydrous and decahydrate. The anhydrous Sodium Sulphate appears as white, odorless, crystalline powder or granular solid, while the decahydrate form (Glauber's salt) is colorless transparent or white translucent granular crystals. It has a salty and bitter taste, a density of 2.671 g/cm³, a melting point of 884℃, and a boiling point of 1430℃. This compound is highly soluble in water, forming a neutral solution, soluble in glycerol but insoluble in ethanol. Anhydrous Sodium Sulphate is hygroscopic and easily absorbs moisture from the air to form hydrates such as heptahydrate (Na₂SO₄·7H₂O) or decahydrate (Na₂SO₄·10H₂O). It is stable under normal conditions and does not have special combustion or explosion properties, but it decomposes under high heat to produce toxic sulfide fumes.

Common Product Specifications

Product Applications

Sodium Sulphate has a wide range of applications across multiple industries, making it a high-demand product for global importers. In the detergent industry, it is used as an ideal filler and diluent due to its neutrality, non-corrosiveness, and low cost, accounting for 42% of global consumption in 2023. In the pulp and paper industry, it is mainly used in the production of kraft pulp, where it is reduced to sulfide, a key active component in pulping. The glass industry is another major application area, as Sodium Sulphate provides sodium and sulfur elements for flat glass production.

Additionally, Sodium Sulphate is used in textile dyeing as a mordant and leveling agent, in tanning as a pre-treatment agent for vegetable tanning of bottom leather, and in the food industry as a diluent for food coloring and a caramel color manufacturing agent. It also serves as a laxative and antidote for barium poisoning in the pharmaceutical field, a feed additive to supplement sodium and sulfur for livestock, a hardener in photo developing, and a common desiccant in organic synthesis laboratories. Furthermore, it is used in the production of sodium sulfide and other related compounds.

Regulatory Compliance & Safety

Sodium Sulphate has completed REACH registration, complying with the EU's Registration, Evaluation, Authorization and Restriction of Chemicals regulation, which ensures its safety and compliance for import and use in the European market. For detailed safety information, MSDS download is available to provide comprehensive guidance on handling, storage, transportation, and emergency measures.

FAQ

Q1: What is the difference between anhydrous Sodium Sulphate and decahydrate Sodium Sulphate?

A1: Anhydrous Sodium Sulphate (CAS 7757-82-6) is a white powder or granular solid with low moisture content, widely used in industrial applications due to its stability. Decahydrate Sodium Sulphate (CAS 7727-73-3), also known as Glauber's salt, is a colorless crystalline solid that easily weathers in dry air to form anhydrous powder, mainly used in pharmaceutical and certain chemical applications.

Q2: Is Sodium Sulphate safe for transportation and storage?

A2: Yes, Sodium Sulphate is stable under normal transportation and storage conditions. It should be stored in a cool, dry, well-ventilated warehouse, away from moisture, heat sources, and incompatible substances (such as strong acids). It is non-toxic but may cause eye irritation, so proper protective equipment should be worn during handling. Detailed safety guidelines are available via MSDS download.

Q3: What are the main importing markets for Sodium Sulphate?

A3: The main global importing markets for Sodium Sulphate include Vietnam, Costa Rica, Colombia, other Southeast Asian countries, and Central and South American countries, which are almost entirely dependent on imports. Europe and North America also have steady demand, with China being the world's largest supplier due to its abundant natural reserves and low production costs.

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