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Sodium Pyrosulphite or Sodium Metabisulfite or Sodium Metabisulphite Manufacturer Exporter BP Ph Eur USP NF FCC Food AR ACS Grade Manufacturer Exporter
Crystal Clear Products is a manufacturer exporter company manufacturing several chemicals including Sodium Pyrosulphite or Sodium Metabisulfite or Sodium Metabisulphite and IP BP Ph Eur USP NF JP ACS AR Analytical Reagent FCC Food Grade, Pharmaceutical Chemicals at best prices. The group has offices and factories in India USA and UAE and toll manufacturers in China and sells to almost every country in the world.
The manufacturing facilities of our partner manufacturers have one or more of FDA-cGMP-GLP certification, ISO-9001 certification, Halal and/or Kosher certification, REACH pre-registration ISO-22000 HACCP. We also allow third party inspection of products offered. We can offer small quantities from laboratory and trial packs to large shipments of container loads of material.
Hazard Statements:
H302: Harmful if swallowed.
H315: Causes skin irritation.
H318: Causes serious eye damage.
EUH031: Contact with acids liberates toxic gas.
Signal Word: Danger
Transport Information
DOT USA, TDG Canada & ADR/RID Europe: Not dangerous goods.
IMO/IMDG: Not dangerous goods.
IATA/ICAO: Not dangerous goods.
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Sodium Metabisulfite or Sodium Metabisulphite SDS of Manufacturers
CAS Number 7681-57-4 Sodium Metabisulfite or Sodium Metabisulphite or Sodium Pyrosulphite, EINECS: 231-673-0, Molecular Weight: 190.11, Chemical Formula: Na2S2O5
Sodium Metabisulfite USP NF Grade Specificatiosn
Na2S2O5 -- 190.11
Disulfurous acid, disodium salt.
Disodium pyrosulfite CAS 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.
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 Metabisulphite BP Ph Eur Grade Specifications
Sodium Pyrosulphite
Na2S2O5
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 FCC Food Grade Specifications
Sodium Pyrosulfite
Na2S2O5 Formula weight 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 Analytical Reagent Grade Specifications
Disodium Disulfite
Na2S2O5
Formula Weight 190.11
CAS Number 7681-57-4
REQUIREMENTS
Assay: minimum 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%
Contact for Monograph, Uses, Matnfacturing Process, etc of Sodium Metabisulfite or Sodium Metabisulphite and JP IP BP Ph Eur USP NF FCC Food AR ACS Reagent Grade Manufacturer Supplier Exporter
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Last updated
11/19/2022
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