Sodium Sulfate (Na₂SO₄)

Also known as: Sodium sulphate, sulfate of soda

CAS Number: 7757-82-6

Description:

Sodium sulfate is an inorganic white crystalline solid, odorless, and highly soluble in water. It exists in both anhydrous and hydrated forms. This versatile compound plays a significant role in various industrial applications due to its chemical stability and solubility.

Applications:

As a filler in powdered home laundry detergents

In the Kraft process for wood pulp manufacturing

As a fining agent to remove air bubbles from molten glass

For leveling in the textile dyeing process

As a diluent for food coloring

Used in heat storage systems for specific thermal applications

Properties (Typical Analysis):

Appearance: White free-flowing powder, free from foreign matter

Purity (Na₂SO₄): 99.8%

NaCl: Max. 0.25% (typical 0.15%)

Calcium (as Ca): Max. 100 ppm (typical 50 ppm)

Magnesium (as Mg): Max. 300 ppm (typical 150 ppm)

Insoluble in Water: Max. 0.02% (typical 0.01%)

pH (5% solution): 8.0 (tolerance: 6.0 – 9.0)

Iron (as Fe): Max. 5 ppm (typical 1 ppm)

Color (CIE – Lab):

L*: 97.0 (min. 95.0)

a*: 0.0 (max. 0.5)

b*: 1.0 (max. 5.0)

Bulk Density: 1.45 g/ml (range: 1.30 – 1.60 g/ml)

Humidity (Water): Max. 0.05% (typical 0.02%)

Heavy Metals (as Pb): < 1 ppm

Granulometry:

Above 1000 microns: Max. 1.0% (typical 0.0%)

Above 50 microns: Min. 90.0% (typical 95.0%)

Mean Particle Size: 200 ± 50 microns

✅ Complies with EU Regulations 231/2012 and 68/2013

✅ Meets Codex of Chemical Substances for Food Additive E 514 (i)

✅ According to Food Chemical Codex 13th Edition