Anhydrous Sodium Sulfate
Basic Information
Name: Sodium Sulfate (Anhydrous)
Other names: Thenardite; salt cake; disodium sulfate
Molecular formula: Na₂SO₄
Molecular weight: 142.04
CAS number: 7757-82-6
2.Physical and Chemical Properties
- Appearance: White crystalline powder or granular
- Melting point: Approximately 884 °C
- Boiling point: Approximately 1429 °C (decomposes)
- Density: Approximately 2.66 g/cm³
- Solubility: Soluble in water (about 28.1 g/100 mL at 25 °C; solubility peaks near 50 g/100 mL around 32.4 °C); insoluble in ethanol
- Aqueous solution: Nearly neutral
- Stability: Stable; slightly hygroscopic
3.Main Functions and Applications (What are its uses?)
- Detergents (core application): Used as a filler and carrier in synthetic laundry detergents.
- Glass manufacturing: Serves as a flux and fining agent, partially replacing soda ash.
- Pulp and paper (core application): Employed as a cooking agent in kraft pulping and as a bleaching auxiliary.
- Textile and dyeing: Applied as a leveling and retarding agent in dyeing processes.
- Chemical industry: Used as a raw material for barium sulfate, sodium sulfide and other chemicals.
- Pharmaceutical: Serves as a laxative (sodium sulfate) and as a pharmaceutical filler.
- Construction: Used as a concrete admixture.
- Dyes and leather processing: Applied in various processing steps.
4.A Benchmark-Level Industrial Masterpiece - A Meticulously Crafted "Premium-Grade" Filler and Flux!
Na2SO4 content reaches 99.3% or higher, meeting the premium grade and delivering reliable performance.
Low water-insoluble matter, calcium/magnesium, chloride and iron ensure clean dissolution and consistent quality. High whiteness of 82% or above makes it an excellent choice for detergents and glass manufacturing.
Low moisture content guarantees stable storage and accurate dosing.
"What you see is what you get" - every lot ships with a complete certificate of analysis.
Product Specification - Anhydrous Sodium Sulfate
|
Product model |
Anhydrous Sodium Sulfate (Na2SO4) |
|
Appearance |
White crystalline powder or granular |
|
Na2SO4 content (%) |
≥ 99.3 |
|
Water-insoluble matter (%) |
≤ 0.05 |
|
Calcium and magnesium (as Mg, %) |
≤ 0.10 |
|
Chloride (as Cl, %) |
≤ 0.12 |
|
Iron (Fe, %) |
≤ 0.002 |
|
Water content (%) |
≤ 0.10 |
|
Whiteness (%) |
≥ 82 |
|
pH (aqueous solution) |
6.0 – 8.0 |
|
Packaging |
25 kg / 50 kg / 1000 kg woven bag |
- Test methods reference: Na2SO4 content by gravimetric method (GB/T 6009); water-insoluble matter by gravimetric method (GB/T 9738); calcium and magnesium by complexometric titration; chloride by turbidimetric/mercurimetric titration; iron by spectrophotometric method (GB/T 3049); water by oven-drying method; whiteness by reflectometer.
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