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Mubychem Group, established in
1976, is the pioneer manufacturer of Zinc Chloride, Ammonium
Chloride, Calcium Chloride, Potassium Chloride, Sodium Acetate,
Sodium Thiosulphate, Pharmaceutical, Fragrance & Flavor chemicals in
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Buy Sodium Sulphite; Door Delivery
Sodium Sulfite; Sodium
Sulphite MSDS
British Pharmacopoeia 2009
Sodium Sulphite Heptahydrate BP
Sodium Sulphite Sodium Sulfite
Action and use
Antioxidant.
DEFINITION
Content
48.0 per cent to 52.5 per cent of Na2SO3.
CHARACTERS
Appearance
Colourless crystals.
Solubility
Freely soluble in water, very slightly soluble in ethanol (96 per cent).
IDENTIFICATION
A. Solution S (see Tests) is slightly alkaline.
B. To 5 ml of solution S add 0.5 ml of 0.05 M iodine . The solution is colourless and gives reaction of sulphates.
C. Solution S gives reaction (a) of sodium (2.3.1) .
D. It complies with the limits of the assay.
TESTS
Solution S
Dissolve 10 g in water R and dilute to 100 ml with the same solvent.
Solution S1
To 20.0 g add 25 ml of water R . Shake until mostly dissolved, and carefully and progressively, add 15 ml of hydrochloric acid R . Heat to boiling. Cool and dilute to 100.0 ml with water.
Appearance of solution
Solution S is clear and colourless.
Thiosulphates
Maximum 0.05 per cent.
Iron
Maximum 5 ppm, determined on solution S1.
Selenium
Maximum 5 ppm.
Zinc
Maximum 12.0 ppm.
Heavy metals
Maximum 5 ppm.
Sodium Sulfite USP-NF
Na2SO3 126.0 [7757-83-7].
Contains not less than 95.0 percent and not more than 100.5 percent of Na2SO3.
A: Dissolve 5 g of in 100 mL of water. [NOTE—Reserve portions of the solution so obtained for use in Identification test B and in the test for Color and clarity of solution.] Add a drop of phenolphthalein TS: a pink color is produced.
B: To 5 mL of the solution from Identification test A, add 0.5 mL of iodine TS: the solution is colorless, and it meets the requirements of the barium chloride test for Sulfat.
C: It meets the requirements of the pyroantimonate precipitate test for Sodium.
Color and clarity of solution— Examine the solution prepared for Identification test A: the solution is clear and colorless.
Heavy metals: 10 3g per g, the Test Preparation being prepared as follows. To 8.0 g of Sodium Sulfite add 25 mL of water. Shake until mostly dissolved, and slowly and carefully add 15 mL of hydrochloric acid. Heat to boiling. Cool, and dilute with water to 100.0 mL. Use a 25-mL portion.
Limit of iron— : not more
Limit of selenium—: not more than 10 3g per g is found.
Limit of thiosulfates— :not more than 25 µg per g is found.
Sodium Sulfite FCC
Na2SO3 Formula wt 126.04
INS: 221 CAS: [7757-83-7]
DESCRIPTION
It occurs as a white or tan to slightly pink powder. It undergoes oxidation in air. Its solutions are alkaline to litmus and to phenolphthalein. One gram dissolves in about 4 mL of water. It is sparingly soluble in alcohol.
Function Preservative; antioxidant; bleaching agent.
REQUIREMENTS
Identification A 1:20 aqueous solution gives positive tests for Sodium and for Sulfite.
Assay Not less than 95.0% of Na2SO3.
Lead Not more than 2 mg/kg.
Selenium Not more than 0.003%.
Sodium Sulfite, Anhydrous ACS
Reagent Chemicals
ACS Specifications
Sodium Sulfite
Sodium Sulfite, Anhydrous
Na2SO3
Formula Wt 126.04
CAS Number 7757-83-7
REQUIREMENTS
|
Assay |
|
98.0%
Na2SO3MAXIMUM ALLOWABLE
|
Insoluble matter |
0.005% |
|
Free acid |
Passes test |
|
Titrable free base |
0.03 meq/g |
|
Chloride (Cl) |
0.02% |
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Heavy metals (as Pb) |
0.001% |
|
Iron (Fe) |
0.001% |
Sodium Sulphite manufacturer
Sodium Sulfite manufacturer at:
MUBY CHEMICALS
S-8, SARIFA MANSION, 2ND FLANK ROAD, CHINCHBUNDER, MUMBAI 400009,
INDIA.
TEL: 91-22-23770100, 23726950,
23774610, 23723564.
FAX: 91-22-23728264.
e-mail:
info@mubychem.com
Cell Call to Anmol: +91-9821870100 or Ambrish: +91-9821570100
Copyright
and Usual
Disclaimer
is Applicable.
Last
updated: 29 April, 2010.
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