Muby Chemicals of Mubychem Group, established in 1976, is the original manufacturers of Specialty Chemicals, Pharmaceutical Excipient, Fragrance & Flavor chemicals in India. Mubychem Group has several manufacturing facilities spread across Western India and world wide contacts and toll manufacturers. We are exporting globally to countries like USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Uganda, Turkey, Mexico, Brazil, Chile, Argentina, Dubai etc -- Sodium metabisulfite or Sodium metabisulphite. The participating units have one or more accreditations like FDA - GMP approval; ISO-9001:2008 Certified; "REACH" Pre-registered; ISO-22000:2005; Kosher Certified; Halal Certified; HACCP. We offer Commercial Pure & IP BP USP FCC Food Grade ACS AR Analytical Reagent Grades of Chemicals Bookmark this Web Site Email This Page Info to Self or a Colleague
Sodium Metabisulphite Metabisulfite BP USP NF ACS Analytical Reagent FCC Food grade Manufacturers
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We offer Sodium Metabisulphite in Commercial pure and Pharmacopoeia grades
British Pharmacopoeia 2009
Sodium Metabisulphite BP
Action and use
Sodium metabisulphite also called sodium disulphite.
95.0 per cent to 100.5 per cent.
White or almost white, crystalline powder or colourless crystals.
Freely soluble in water, slightly soluble in ethanol (96 per cent).
A. pH 3.5 to 5.0 for solution S.
B. To 0.4 ml of iodinated potassium iodide solution R add 8 ml of distilled water R and 1 ml of solution S diluted 1 to 10 in distilled water R. The solution is colourless and gives reaction of sulphate.
C. Solution S gives reaction of sodium.
Dissolve 5.0 g in carbon dioxide-free water prepared from distilled water and dilute to 100 ml with the same solvent.
Appearance of solution
Solution S is clear and colourless.
3.5 to 5.0 for solution S.
To 5 ml of solution S add 5 ml of dilute hydrochloric acid R. The solution remains clear for at least 15 min.
Maximum 5 ppm.
Maximum 20 ppm, determined on solution S.
Maximum 20 ppm.
Sodium Metabisulfite USP NF
Sodium Metabisulfite USP NF
Na2S2O5 -- 190.11
Disulfurous acid, disodium salt.
Disodium pyrosulfite [7681-57-4]
Sodium Metabisulfite contains an amount of Na2S2O5 equivalent to not less than 65.0 percent and not more than 67.4 percent of SO2.
Packaging and storage— Preserve in well-filled, tight containers, and avoid exposure to excessive heat.
Identification— A solution (1 in 20) responds to the tests for Sodium 191 and for Sulfite.
Limit of chloride— Dissolve 1.0 g in 10 mL of water, filter, if necessary, through a small chloride free filter, and add 6 mL of 30 percent hydrogen peroxide. Add 1 N sodium hydroxide until the solution is slightly alkaline to phenolphthalein, dilute with water to 100 mL, and mix. Dilute 2.0 mL of this solution with water to 20 mL, and add 1 mL of nitric acid and 1 mL of silver nitrate TS. Mix, allow to stand for 5 minutes protected from direct sunlight, and compare the turbidity, if any, with that produced from a 2-mL aliquot of a control (prepared by diluting 0.71 mL of 0.020 N hydrochloric acid to 100 mL) in an equal volume of total solution containing the quantities of reagents used in the test : any turbidity produced by the test specimen does not exceed that of the control preparation (0.05%).
Iron—: the limit is 0.002%.
Limit of thiosulfate— Mix 2.2 g with 10 mL of 1 N hydrochloric acid in a 50-mL beaker. Boil gently for 5 minutes, cool, and transfer to a small test tube. Any turbidity is not greater than that produced by 0.10 mL of 0.10 N sodium thiosulfate, similarly treated (0.05%).
Heavy metals—: the limit is 0.002%.
Sodium Metabisulfite FCC Food Grade
Na2S2O5 Formula wt 190.11
INS: 223 CAS: [7681-57-4]
Sodium Metabisulfite occurs as colorless crystals or as a white to yellow, crystalline powder. It is freely soluble in water and slightly soluble in alcohol. Its solutions are acid to litmus.
Function: Preservative; antioxidant.
Identification: A 1:10 aqueous solution gives positive tests for Sodium and for Sulfite.
Assay: Not less than 90.0% and not more than 100.5% of Na2S2O5.
Iron: Not more than 10 mg/kg.
Lead: Not more than 2 mg/kg.
Selenium: Not more than 5 mg/kg.
Sodium Metabisulfite ACS Analytical Reagent
Formula Wt 190.11
CAS Number 7681-57-4
Assay min 97.0% Na2S2O5
Insoluble matter 0.005% Chloride (Cl) 0.05% Thiosulfate (S2O3) 0.05% Heavy metals (as Pb) 0.001% Iron (Fe) 0.002%
Sodium Metabisulphite BP IP Sodium Metabisulfite USP NF ACS Analytical Reagent FCC Food grade manufacturers at:
S-8, SARIFA MANSION, 2ND FLANK ROAD, CHINCHBUNDER, MUMBAI 400009, INDIA
TEL: (OFFICE) 91-22-23770100, 23726950; FAX: 91-22-23728264
USA & Canadian Customers may
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Last updated: 28 April, 2013.
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