Sodium Sulphate:
IUPAC Name: Disodium; Sulfate
HS Code: 2833.11.00
Formula: Na2SO4
Appearance: White Crystals
CAS No: 7757-82-6
Common Names: Glauber’s salt
Sodium Sulphate has the appearance of a white crystalline solid and is chemically very stable. The hygroscopic nature of sodium sulfate causes it to absorb water and moisture, forming Glauber’s salt. It exists as a natural resource and is found in the bed of lakes such as in Saskatchewan.
It is mainly used in Detergent Industry acting as a water softener, and competes with the magnesium and calcium ions in hard water, preventing them from combining with the detergent used. In addition, it also helps to remove grease and wine stains. It is also used in the Textile industry during scouring, bleaching, and dyeing. Its usage also involves Pulp & Paper Industry for controlling the pH in the pulping process, neutralizing the effluent streams, and processing waste paper
| Property | Units | Value |
|---|---|---|
| Appearance | White powder or white crystals | |
| Assay | % | 97.0 (min) |
| Free alkali (as Na2SO3) | % | 0.60 (max) |
| Arsenic (as As) | % | 0.0002 (max) |
| Iron (as Fe) | % | 0.01 (max) |
| Heavy Metal (as Pb) | % | 0.001 (max) |
| Clarity | % | Passed |