Physical and Chemical Properties
Physical State		White crystalline powder with weak sulfurous odor
Melting Point		52°C
Boiling Point		Decomposes
Specific Gravity		2.19-2.20
Solubility in Water		Soluble (insoluble in alcohol and methanol)
PH		Acidic in solution
NFPA Ratings		Health: 2; Flammability: 3; Reactivity:1
Flash Point		90°C
Stability		Stable under ordinary conditions (Decomposes in hot water and acid)

Applications
Reducing Agent, Sulfonating Agent, Textile Dyeing, Pulp and Kaolin Bleaching, Leather, Foods and Beverages, Polymers, Photograghics, Chemical processing, cleaners, water treatment, gas purification, and environmental improvement.
Sales Specification
Appearance	White crystal powder
Class	Grade 1		Grade 2	Grade 3
Assay	90% Min		88% Min	85% Min
Insoluble	0.1% Max		0.1% Max	0.1% Max
Storage Life (Month)	10		12	12
NaS2O5	8-10%		8-10%	8-10%
NaS2O3	0.1% Max		0.1% Max	0.1% Max
Na2CO3	0.5-3%		0.5-3%	0.5-3%

Package:

In 50 KG Iron drum (Dia: 37.5cm x Height: 47cm) 12 drums/pallet