Muby Chemicals of Mubychem Group, established in 1976, is the original manufacturers of Specialty Chemicals, Pharmaceutical Excipient, Fragrance & Flavor chemicals, Shale Gas Fracturing 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, Cameroon, Uganda, Turkey, Mexico, Brazil, Chile, Argentina, Dubai, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, China, Germany, France, Italy, Portugal etc. The products are offered as per required specifications and in correct shape and size in mm or meshs or microns as specified by the buyer.
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Sodium Metabisulphite Metabisulfite BP USP NF ACS Analytical Reagent FCC Food grade Manufacturers

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Sodium Metabisulfite
Technical & Pure Sodium Metabisulphite
Also IP BP Ph. Eur. USP ACS AR LR FCC Food Grades

Sodium Metabisulfite

We offer Sodium Metabisulphite in Commercial pure and Pharmacopoeia grades

British Pharmacopoeia 2009

Sodium Metabisulphite BP

Sodium Pyrosulphite
Na2S2O5
Action and use
Antioxidant.

DEFINITION
Sodium metabisulphite also called sodium disulphite.
Content
95.0 per cent to 100.5 per cent.

CHARACTERS
Appearance
White or almost white, crystalline powder or colourless crystals.
Solubility
Freely soluble in water, slightly soluble in ethanol (96 per cent).

IDENTIFICATION
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.

TESTS
Solution S
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.
pH
3.5 to 5.0 for solution S.
Thiosulphate
To 5 ml of solution S add 5 ml of dilute hydrochloric acid R. The solution remains clear for at least 15 min.
Arsenic
Maximum 5 ppm.
Iron
Maximum 20 ppm, determined on solution S.
Heavy metals
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

Sodium Pyrosulfite
Na2S2O5 Formula wt 190.11
INS: 223 CAS: [7681-57-4]

DESCRIPTION
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.

REQUIREMENTS
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

Reagent Chemicals
ACS Specifications
Sodium Metabisulfite
Disodium Disulfite
Na2S2O5
Formula Wt 190.11
CAS Number 7681-57-4

REQUIREMENTS
Assay min 97.0% Na2S2O5

MAXIMUM ALLOWABLE
Insoluble matter 0.005%
Chloride (Cl) 0.05%
Thiosulfate (S2O3) 0.05%
Heavy metals (as Pb) 0.001%
Iron (Fe) 0.002%

Manufacturers:

MUBY CHEMICALS
Ambernath Mumbai, Ankleshwar Gujarat, India
TEL: (OFFICE) 91-22-23770100, 91-22-23774610
Current Date Time in India GMT+5:30 hours

e-mail: info@mubychem.com

USA & Canadian Customers may
e-mail: usa@mubychem.com
Call toll-free 1-844-682-9243 (1-844-MUBYCHEM)

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Last 11 April, 2017 .

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