Product Introduction

Appearance: White crystalline powder, with a sulfur dioxide odor; soluble in water。

Molecular Formula: NaHSO3

Molecular Weight: 104.06

CAS No.: 7631-90-5

UN No.: 2693

DG Class: 9 (Miscellaneous dangerous goods)

Packing Group: III

Physical/Chemical Properties: Density: 1.48; Melting point: 150°C (decomposition); Water solubility: 300 g/L; pH: 4.5。

Main Applications

• Food industry reducers, bleaching agents, preservatives, antioxidants

• Dyes, papermaking, tanning industry reducers

• Pharmaceutical industry intermediates (acetaminophen, aminopyrine)

• Cotton fabric bleaching, beverage sterilization

Safety Information

Hazard Symbols: Xn

Hazard Statements: H302

Precautionary Statements: P264 P270 P301+P312 P501

Quality Standard: GB 1894-1992（Food-grade NaHSO3 ≥ 96%）

Storage & Transport: Store in a cool, dry, well-ventilated place away from incompatible materials. Handle with appropriate PPE. Refer to the Safety Data Sheet (MSDS) for detailed handling, first-aid, fire-fighting and accidental release measures.