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Mubychem Group, established in 1976, is the pioneer manufacturer of Sodium Thiosulphate, Pharmaceutical Fragrances & Flavour Chemicals in India. Mubychem Group has manufacturing facilities spread across Western India. The group is a chemical exporter to almost every country and has a local representative in major business areas. |
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Sodium Thiosulphate BP IP Sodium Thiosulfate USP Manufacturers
Sodium Thiosulfate USP
Na2S2O3·5H2O 248.19
Sodium
Thiosulfate USP
Contains
not less than 99.0 percent and not more than 100.5 percent of Na2S2O3,
calculated on the anhydrous basis.
Packaging and storage— Preserve in tight containers.
Identification—
A: To a solution (1 in
10) add a few drops of iodine TS: the color is discharged.
B: A solution (1 in 10)
responds to the tests for Sodium and for Thiosulfate.
Water— Dry about 1.0 g,
accurately weighed, in vacuum at 40 o to 45o for 16 hours:
it loses between 32.0% and 37.0%
of its weight.
Calcium— Dissolve 1 g Sodium Thiosulfate in 20 mL of water, and add a few mL of ammonium oxalate TS: no turbidity is produced.
Heavy metals—: the
limit is 0.002%.
Sodium Thiosulphate BP
Na2S2O3,5H2O
Sodium
Thiosulphate BP
DEFINITION
Content
99.0 per cent to 101.0 per cent of Na2S2O3,5H2O.
CHARACTERS
Appearance
Transparent, colourless crystals, efflorescent in dry air.
Solubility
Very soluble in water, practically insoluble in ethanol 96 per cent. It
dissolves in its water of crystallization at about 49 °C.
IDENTIFICATION
A.
It decolorizes iodinated potassium iodide solution.
B.
To 0.5 ml of solution S (see Tests) add 0.5 ml of water R and 2 ml of silver nitrate solution. A white precipitate is formed which rapidly becomes
yellowish and then black.
C.
To 2.5 ml of solution S add 2.5 ml of water and 1 ml of hydrochloric
acid. A precipitate of sulphur is formed and gas is evolved which gives a blue colour to starch iodate paper.
D.
1 ml of solution S gives reaction of sodium.
TESTS
Solution S
Dissolve 10.0 g in
carbon
dioxide-free water R prepared from distilled water R and dilute to
100 ml with the same solvent.
Appearance of solution
The freshly prepared solution
is clear and colourless.
Dissolve 10.0 g in 50 ml of
distilled water, add 1 ml of 0.1 M sodium hydroxide and dilute to 100
ml with the same solvent.
pH
6.0 to 8.4 for the freshly
prepared solution S.
Sulphates and sulphites
Maximum 0.2 per cent.
Sulphides
To 10 ml of solution S add
0.05 ml of a freshly prepared 50 g/l solution of sodium nitroprusside. The
solution does not become violet.
Heavy metals
Maximum 10 ppm.
ASSAY
Dissolve Sodium Thiosulfate 0.500 g in 20 ml of
water and titrate with 0.05 M iodine, using 1 ml of starch solution,
added towards
the end of the titration, as indicator.
1 ml of 0.05 M iodine
is equivalent to 24.82 mg of Na2S2O3,5H2O.
Sodium Thiosulphate IP
Na2S2O3 - 5H2O
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Sodium Thiosulfate
USP Manufacturers
Sodium Thiosulphate BP Manufacturers:
MUBY
CHEMICALS
S-8,
SARIFA MANSION, 2ND
FLANK ROAD, CHINCHBUNDER, MUMBAI 400009,
INDIA.
TEL: (OFFICE) 91-22-23770100,
23774610, 23726950, 23723564. FAX: 91-22-23728264.
E-mail: info@mubychem.com
USA & Canadian Customers may Call 773-829-5811; 312-450-3880
Copyright
and Usual Disclaimer is
Applicable
Last updated
April 08, 2012
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I shall pass through this world, but once. If therefore, there is any good that I can do, or if there is any favour that I can show to a fellow human being, let me do it now. Let me not defer or neglect it. For I shall not tread this way again.
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Muby Chemicals Old Spice: Manufacturing since more than Three Decades: |
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