Sodium Sulfate

Sodium Sulfate

CAS Number:7757‑82‑6

Synonyms:Sodium sulfate; Disodium sulfate; Anhydrous sodium sulfate; Glauber’s salt (hydrate)

Chemical Formula:Na₂SO₄

Molecular Weight:142.04 g/mol

Product Introduction

A white, odorless, water‑soluble crystalline powder (or decahydrate). Used widely as a filler in detergents, glass and paper production, and as an inert drying agent in labs.

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Physical & Chemical Properties

Property Value
Appearance White crystalline powder (anhydrous)
Density @ 25 °C 2.68 g/cm³
Melting Point 884 °C
Boiling Point ~1700 °C
Solubility in Water @20 °C ~19.5 g/100 mL; peaks ~49.7 g/100 mL near 32.4 °C
pH (saturated soln) ~5.2–9.2
Hygroscopicity Slight; hydrate forms in moist air

Applications

  • Detergent filler: controls powder consistency
  • Glass & paper: used as a flux or cooking agent
  • Lab reagent: drying agent for organic solvents
  • Kraft pulping, textiles, starch, soaps, defrosting

Safety & Handling

  • Low toxicity; dust may irritate eyes/respiratory tract. Nonflammable. Store in cool, dry place; keep sealed.

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