Sodium Metabisulphite Metabisulfite Pure & BP USP NF ACS 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
We offer Sodium Metabisulphite in Commercial pure and Pharmacopoeia grades
Specifications of Sodium Metabisulphite BP Ph Eur
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.
Specifications of 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
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
Reagent Chemicals
ACS Specifications
Sodium Metabisulfite
Disodium
Disulfite
Na2S2O5
Formula Wt 190.11
CAS
Number 7681-57-4
| 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% |
Sodium Metabisulphite BP IP Sodium Metabisulfite USP NF ACS Analytical Reagent FCC Food grade manufacturers at:
Muby Chem Ltd.
Toll manufacturing & Warehouse at Houston & Midland, Texas, USA and India
USA, Canada, Mexico Customers may e-mail: usa@mubygroup.com
Call 1-844-682-9243
Europe Africa Asia India Mumbai e-mail: info@mubygroup.com
Call +91-22-23774610
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Suppliers Manufacturers Exporters Importers between USA Canada UAE Europe South Africa Tanzania Kenya Uganda Egypt Nigeria Turkey Mexico Brazil Argentina Chile Dubai China India etc.
Copyright and Usual Disclaimer is Applicable.
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