Anhydrous sodium sulfate is a white crystalline inorganic salt with the chemical formula Na₂SO₄. It is also known as sodium sulphate anhydrous, disodium sulfate, salt cake, or thenardite in its natural mineral form. The term “anhydrous” means that the material does not contain water of crystallization, making it different from hydrated sodium sulfate forms such as Glauber’s salt.
Because of its stability, water solubility, and cost-effective industrial performance, sodium sulfate anhydrous is widely used in detergents, pulp and paper production, glass manufacturing, textile dyeing, chemical processing, and laboratory drying applications. For manufacturers and industrial buyers, it is important to understand the product’s specifications, applications, packaging options, and safe handling requirements before sourcing.
This guide explains what anhydrous sodium sulfate is, its key properties, common industrial uses, safety considerations, and how it differs from sodium lauryl sulfate, a separate surfactant often confused because of the similar name.
What Is Anhydrous Sodium Sulfate?
Anhydrous sodium sulfate is the water-free form of sodium sulfate. It appears as a white crystalline powder or granular solid and is generally odorless. It dissolves readily in water and remains chemically stable under normal storage conditions when kept dry.
Property | Typical Information |
Product name | Anhydrous Sodium Sulfate / Sodium Sulphate Anhydrous |
Chemical formula | Na₂SO₄ |
CAS number | 7757-82-6 |
Molecular weight | 142.04 g/mol |
Appearance | White crystalline powder or granules |
Solubility | Soluble in water |
Common grades | Industrial grade, detergent grade, technical grade, laboratory grade |
The exact specification may vary depending on the grade and application. Industrial buyers usually evaluate purity, moisture content, particle size, chloride level, iron content, bulk density, packaging, and delivery availability before placing an order.
Main Uses of Anhydrous Sodium Sulfate
Anhydrous sodium sulfate is used across several industries because it is economical, stable, and compatible with many manufacturing processes. Its main applications include detergent production, pulp and paper processing, glass manufacturing, textile dyeing, and chemical synthesis.
- Detergent and Cleaning Products
In powdered detergents, sodium sulfate anhydrous is commonly used as a filler, processing aid, and moisture-control agent. It helps improve powder flow, supports product consistency, and reduces clumping during storage and transport. This makes it useful for laundry detergents, dishwashing powders, and general cleaning formulations.
- Pulp and Paper Industry
In the pulp and paper industry, sodium sulfate is associated with the kraft process, where sodium-based chemicals are used in wood pulping and chemical recovery systems. It supports efficient processing and is relevant to manufacturers producing paper, packaging materials, and related pulp-based products.
- Glass Manufacturing
In glass production, anhydrous sodium sulfate can act as a fining agent. It helps remove small gas bubbles from molten glass, improving clarity and uniformity in the finished product. This application is important in container glass, flat glass, and other glass manufacturing processes.
- Textile Dyeing and Processing
In textile processing, sodium sulfate anhydrous is used to assist dyeing operations. It helps promote even dye distribution and improves color consistency on fabrics. Textile manufacturers may use it in dye baths depending on fiber type, dye chemistry, and process requirements.
- Chemical Processing and Laboratory Drying
Anhydrous sodium sulfate is also used as a drying agent in chemical and laboratory applications. It can remove traces of water from organic liquids and support chemical synthesis processes where moisture control is important.
Anhydrous Sodium Sulfate vs Sodium Lauryl Sulfate
Anhydrous sodium sulfate and sodium lauryl sulfate are not the same chemical. The names sound similar, but they have different structures, functions, and industrial uses.
Feature | Anhydrous Sodium Sulfate | Sodium Lauryl Sulfate |
Chemical type | Inorganic salt | Organic surfactant |
Formula | Na₂SO₄ | C₁₂H₂₅NaO₄S |
Main function | Filler, drying agent, processing aid | Foaming and cleaning agent |
Common uses | Detergents, paper, glass, textiles, chemical drying | Shampoo, toothpaste, body wash, liquid cleaners |
Buyer intent | Industrial chemical sourcing | Surfactant and personal care formulation |
For SEO, this page should mainly target “anhydrous sodium sulfate” and related industrial chemical keywords. Sodium lauryl sulfate should only be mentioned briefly to answer comparison searches and avoid confusing buyers.
Packaging, Storage and Handling
Anhydrous sodium sulfate should be packed and stored in a way that prevents moisture absorption and contamination. Common commercial packaging includes 25 kg bags, 50 kg bags, jumbo bags, or customized bulk packaging depending on buyer requirements and shipment volume.
Recommended storage conditions include keeping the material in a cool, dry, and well-ventilated warehouse. Bags should remain sealed when not in use. Although sodium sulfate anhydrous is generally stable, prolonged exposure to moisture may affect flowability and product performance.
During handling, workers should avoid inhaling dust and should use suitable personal protective equipment such as gloves, safety glasses, and a dust mask where required. Buyers should always refer to the supplier’s safety data sheet before handling or transporting the product.
How to Choose a Sodium Sulfate Anhydrous Supplier
When sourcing anhydrous sodium sulfate, buyers should evaluate more than price. A reliable supplier should provide consistent quality, clear product specifications, appropriate packaging, documentation, and dependable delivery support.
- Confirm the required grade: industrial, detergent, textile, paper, glass, or laboratory grade.
- Check key specifications such as purity, moisture, chloride, iron, heavy metals, and particle size.
- Request a certificate of analysis and safety data sheet before purchase.
- Confirm packaging size, palletization, and container loading requirements.
- Review lead time, minimum order quantity, payment terms, and shipping terms.
For buyers using sodium sulfate anhydrous in manufacturing, supplier consistency is especially important. Variations in moisture, particle size, or impurities can affect detergent blending, dyeing performance, paper processing, or glass quality.
Frequently Asked Questions
What is anhydrous sodium sulfate used for?
Anhydrous sodium sulfate is used in powdered detergents, pulp and paper production, glass manufacturing, textile dyeing, chemical processing, and laboratory drying applications.
Is sodium sulfate anhydrous the same as sodium lauryl sulfate?
No. Sodium sulfate anhydrous is an inorganic salt, while sodium lauryl sulfate is an organic surfactant used for foaming and cleaning in personal care and cleaning products.
What is the CAS number of anhydrous sodium sulfate?
The CAS number for sodium sulfate anhydrous is 7757-82-6.
What is the chemical formula of anhydrous sodium sulfate?
The chemical formula of anhydrous sodium sulfate is Na₂SO₄.
Is anhydrous sodium sulfate soluble in water?
Yes. Anhydrous sodium sulfate is soluble in water, which makes it suitable for use in detergents, textile dyeing, chemical processing, and other water-based industrial applications.
Why is sodium sulfate used in detergent powder?
Sodium sulfate is used in detergent powder as a filler, processing aid, and moisture-control ingredient. It helps improve powder flow, reduce clumping, and support consistent product quality.
What industries use sodium sulfate anhydrous?
Sodium sulfate anhydrous is used in detergent manufacturing, pulp and paper production, glass manufacturing, textile dyeing, chemical processing, and laboratory applications.
How should anhydrous sodium sulfate be stored?
Anhydrous sodium sulfate should be stored in a cool, dry, and well-ventilated area. Bags should remain sealed to prevent moisture absorption and contamination.
What should buyers check before purchasing sodium sulfate anhydrous?
Buyers should check the required grade, purity, moisture level, particle size, chloride content, iron content, packaging, certificate of analysis, safety data sheet, lead time, and delivery terms.
Conclusion
Anhydrous sodium sulfate is a versatile industrial chemical used in detergents, pulp and paper, glass, textiles, chemical processing, and drying applications. For SEO and buyer conversion, this article should focus primarily on sodium sulfate anhydrous, sodium sulphate anhydrous, anhydrous sodium sulfate uses, sodium sulfate supplier, and industrial sodium sulfate applications.
Buyers should confirm the required grade, specification, packaging, documentation, and delivery terms before ordering. A reliable sodium sulfate anhydrous supplier can help ensure stable product quality and smooth supply for industrial production needs.
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