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Sodium Sulfite 97% AR Grade Reagent

Cas Number:7757-83-7
Formula: Na2SO3
Molar Mass:126.04
EC Number:231-821-4

Quantity:
  • AR
  • LABOR
  • 226802129

Sodium Sulfite 97% AR Grade Reagent


Cas Number:7757-83-7

Formula: Na2SO3

Molar Mass:126.04

EC Number:231-821-4


Physicochemical properties:

White crystals or powder with sulphur dioxide odor. Sensitive to humidity. It is more stable than crystalline sodium sulfite, but it can be oxidized to sodium sulfate for a long time and decomposed into sodium sulfate and sodium sulfide by heating. It can be dissolved in 3.2 parts of water, soluble in glycerin, almost insoluble in ethanol. The aqueous solution is alkaline and with about 9. The relative density (d 154)is 2.633. The median lethal dose (rat, vein) is 115 mg/kg.


Usage:

Nitrogen oxide is absorbed in the gas analysis. Determination of formaldehyde, chlorate, bromate, iodate. Reducing agent. Determination of bismuth, magnesium, copper, zinc and phosphorus. Photographic developer.


Packing:

500g/25kg






Item of Analysis

Standard

Assay,%

97.0 min

Transparency of solution

to pass test

Insoluble in water,%

0.005 max

Bisulfite

to pass test

Free alkali (as Na2CO3),%

0.1 max

Chloride(Cl),%

0.005 max

Hyposulphite(as S2O3),%

0.01 max

Arsenic(As),%

0.0001 max

Iron(Fe),%

0.0005 max

Heavy metals(as Pb),%

0.001 max


Not a hazardous substance or mixture.


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