Sodium sulfite

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100 Metric Ton	Negotiable

100 Metric Ton

Negotiable

7757-83-7 Sodium sulfite seller in China Sell high quality 7757-83-7 produced in China factory

Product name: sodium metabisulfite / sodium metabisulphite
Molecular weight: 190.10
Specification: 25Kg woven bag
Quality guarantee period: 6 months

Basic information

Product Name:	Sodium sulfite
Synonyms:	Sodium sulfite anhydrous;SODIUM SULFITE, EXSICCATED;SODIUM SULPHITE;anhydroussodiumsulfite;disodiumsulfite;exsiccatedsodiumsulfite;natriisulphis;natriumsulfid
CAS:	7757-83-7
MF:	Na2O3S
MW:	126.04
Product Categories:	Inorganic Chemicals;Inorganics;Water Ttreatment Chemicals;Analytical Reagents for General Use;Disulfide Bridge Cleavage Reagents;Denaturation;Synthetic Reagents;ACS GradeBiochemicals and Reagents;Synthetic Reagents;inorganic compound;Paper, glass, printing and dyeing
Mol File:	7757-83-7.mol

Chemical Properties

melting point	500 °C
density	2.63
refractive index	1,484
storage temp.	Store at RT.
solubility	H2O: 1 M at 20 °C, clear, colorless
Water Solubility	23 g/100 mL (20 ºC)
Sensitive	Hygroscopic
Stability	Stable. Incompatible with strong acids. Moisture and air sensitive.

Technical specification

Specification Index name	Analytically pure-AR	Chemical pure-CP	High purity
Content(Na2SO3)	≥97.0	≥95.0	≥96.0
Clarity test	Qualified	Qualified
Water insoluble	≤0.005	≤0.01	≤0.03
Sulphurous acid( counted by Na2HSO3 )	Qualified	Qualified
Free alkali( counted by Na2CO3 )	≤0.1	≤0.3	≤0.5
Chloride(Cl)	≤0.005	≤0.02	≤0.05
Thiosulfuric acid(S2O3)	≤0.01	≤0.02	≤0.04
Ferrum(Fe)	≤0.0005	≤0.002	≤0.003
Heavy metal(counted by Pb)	≤0.001	≤0.002	≤0.003
Arsenic(As)	≤0.0001	≤0.0005	≤0.001