Ammonium sulfate, CAS# 7783-2-2

Ammonium sulfate, CAS# 7783-2-2 — corrected CAS: 7783-20-2 — is a white crystalline inorganic salt used broadly as a reagent and process chemical. It is commonly supplied for laboratory and industrial use by the manufacturer Alpha Chemika and distributed by EMDA. Typical pack size: 250 g.

Specifications

• Chemical formula: (NH4)2SO4
• Molecular weight: ~132.14 g·mol⁻¹
• Appearance: white crystalline powder
• Solubility: ~77 g/100 mL (25 °C)
• Typical pH (1 M in H2O): ~5–6
• Grades: technical, reagent and molecular biology grades (lab-grade commonly ≥99% assay)

Key features & common applications

• Protein purification: widely used for protein precipitation/salting-out in biochemistry and molecular biology.
• Agriculture: used as a nitrogen fertilizer and soil amendment for alkaline soils.
• Industrial processes: textile dyeing, tanning, water treatment, and as a flame-retardant filler in some formulations.
• Analytical and pH control: used as a reagent for buffer preparation, pH adjustment and analytical chemistry.

Handling & storage

• Store in a cool, dry place in a tightly closed container; avoid moisture absorption.
• Irritant: avoid inhalation and contact with eyes/skin; consult SDS for detailed safety and disposal instructions.