Sodium Sulphite Anhydrous

Description

Product description:

Molecular Formula Na2SO3
Molecular weight 126.04
Appearance white or yellowish powder
PH valune 9~9.5(alkaline)
Solubility at 40 ºC, the highest solubility is about 37.4g/100 ml of water.
Oxidizability oxidize to sodium sulfate when contacting with air.
Decomposabilty decompose into sodium sulphide at high temperature
Ratio 2.633 (15.4ºC)
Refractive Index 1.565

Usage

(1) Industry Grade : Used in Dyeing and printing Industry ,as dechlorinating agent and bleaching agent,  in leather and tanning industry as bleaching agent , developer agent , reductant agent , stabilizer agent , or used in papermaking, electronic and water treatment industry.

(2) Photo Grade: In the photographic industry as component of developer bath  .

(3) Pharmaceutical Grade : pharmaceutical industry for the production of chloroform, benzene and formaldehyde phenylpropanoid Sulfone

Specification:

Item Super grade First grade
Assay 97%min 96%min
Fe 0.003%max 0.005%max
Water insoluble 0.02%max 0.03%max
Na2CO3 0.1%max 0.4%max
H2SO4 2.5%max Not test
NaCl 0.1%max Not test