Sodium Sulfite

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Sodium Sulfite

CAS NO.： 7757-83-7

FOB Price： NEGOTIABLE Get Latest Price

Specification： ≥96.0%

Documentation： Get COA after inquiry

Lead Time： 14-30 days

Max Capacity： 50000MT/Year

Packing： 25KG/Paper Bag; Customed Package; 25KG/Woven Bag; 50KG/Woven Bag

Product Detail

Properties

Food Grade Sodium Sulfite

Item	Chinese standard	Company standard
Item	GB1894-2005	Company standard
sodium sulfite (Na₂SO₃), mass fraction /%	≥96.0	≥97.0
Fe, mass fraction /%	≤0.01	≤0.001
Free alkali(As content Na₂CO₃), mass fraction /%	≤0.60	≤0.4
Heavy metal content(Pb), mass fraction /%	≤0.001	≤0.0005
As content (As content), mass fraction /%	≤0.0002	≤0.0002
Clarity	Passed	Passed

Molecular Formula: Na₂SO₃

Molecular Weight: 126.04

Appearance: white crystalline powder

Packing:polypropylene weaving bag lined with polyethylene plastic bag, paper plastic compound bag, etc.

Net wt.:25/50/1000kg/bag or upon clients' request

Properties

Sodium sulfite is an inorganic compound. It is a white granular powder at room temperature, soluble in water and reducing. It is disproportioned into sodium sulfide and sodium sulfate when heated and gradually oxidized into sodium sulfate when placed in air. It can exist in three forms: anhydrous matter, heptahydrate and decahydrate, of which anhydrous matter is the most difficult to be oxidized. Its aqueous solution is alkaline due to hydrolysis and releases toxic sulfur dioxide gas during acidification. Sodium sulfite can be prepared by introducing sulfur dioxide into sodium hydroxide solution. When sulfur dioxide is excessive, sodium bisulfite will be generated. Sodium sulfite can be used as developer, preservative of dried fruit and meat, Deoxidizer in printing and dyeing industry, and reducing chemical reagent. It is used in chemical industry and laboratory production and synthesis.

CAS No.

7757-83-7

Formula

Na2O3S

Molecular Mass

126.04300

Exact Mass

125.93600

PSA

82.40000

Logp

-0.13840