Product name

Sodium hydrosulfite

Alias

Sodium dithionite hydrate; Sodium hydrosulphite; Sodium dithionite; disodium dithionite

CAS RN

7775-14-6

EINECS #

231-890-0

Molecular formula

Na₂O₄S₂

Molecular weight

174.1071

Dangerous mark

 Xn:Harmful

Risk term

R22; R31; R7;

Safety term

S26; S28A; S43E; S7/8;

Pysico-chemical property

appearance white crystal powder
relative density 2.3~2.4 
solubility easily soluble in water; insoluble in alcohol 

Uses

as reducing agent in textile printing; bleaching agent of paper pulp; pharmaceutical and analytical reagent