Sodium Hydrosulfite , >85.0%(T) , 7775-14-6

Synonym(s):
Sodium dithionite;Sodium hydrosulfite;Sodium hydrosulfite, Sodium hypodisulfite;Sodium hypodisulfite

CAS NO.：7775-14-6

Empirical Formula: Na2O4S2

Molecular Weight: 174.11

MDL number: MFCD00011640

EINECS: 231-890-0

Update time: 2022-07-08

PRODUCT Properties

Melting point:	300 °C
Boiling point:	1390°C
Density	2.13
Flash point:	>100°C
storage temp.	Store at +5°C to +30°C.
solubility	250 g/L (20°C)
form	Powder/Solid
color	White
Odor	None or slight scent of sulfur dioxide
PH	5.5-8.5 (50g/l, H2O, 20℃)
Water Solubility	250 g/L (20 ºC)
Sensitive	Moisture Sensitive
Merck	14,8626
Stability:	Stable, but air sensitive. Incompatible with strong acids, strong oxidizing agents, water, moisture.
LogP	-2.756 (est)
CAS DataBase Reference	7775-14-6(CAS DataBase Reference)
EPA Substance Registry System	Sodium hydrosulfite (7775-14-6)

Description and Uses

Sodium hydrosulfite is used as a reducing agent in aqueous solutions, sulfonating agent , chelating agent and decolorizing agent in organic reactions. It finds application in water treatment, gas purification, cleaning, leather, polymers, photography, and many others. It is involved in chemical enhanced oil recovery to stabilize polyacrylamide polymers against radical degradation in the presence of iron. It plays an important role to determine the iron content in soil chemistry.

Safety

Symbol(GHS)	GHS02,GHS07
Signal word	Danger
Hazard statements	H251-H302-H319
Precautionary statements	P235-P264-P270-P280-P301+P312-P305+P351+P338
Hazard Codes	Xn
Risk Statements	7-22-31
Safety Statements	26-28-43-7/8-43E-28A
RIDADR	UN 1384 4.2/PG 2
WGK Germany	1
F	1-10
Autoignition Temperature	>200 °C
TSCA	Yes
HazardClass	4.2
PackingGroup	II
HS Code	28311010
Hazardous Substances Data	7775-14-6(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 2500 mg/kg