Selenious Acid USP, Sodium Selenite BP Ph Eur Manufacturers

Anmol Chemicals is the pioneer manufacturers of Selenious Acid and Sodium Selenite, Pharmaceutical Excipients Food & Flavor chemicals in India. We offer Halal and Kosher Selenious Acid and Sodium Selenite made in an ISO9001, ISO22000 (FSSC22000) cGMP and GLP certified facility. Our group has several manufacturing facilities spread across the world, supported by toll manufacturers and representatives in UAE, Europe, USA, China and has several associated manufacturing facilities spread across India. All the Information on Physics, Chemistry, Applications, Uses and Technology on Manufacture of Selenious Acid is in these pages.

The units have one or more of the certifications like FDA GMP, ISO 9001, ISO 22000, HACCP, REACH, Kosher & Halal

Selenious Acid Pure and USP Grade, Sodium Selenite BP Ph Eur Manufacturers

Selenious Acid CAS Number 7783-00-8, EINECS EC Number 231-974-7, HS Code ---**; Molecular Weight 128.97, Molecular Formula: H2SeO3,

CAS Number: pentahydrate: 26970-82-1 or (anhydrous: 10102-18-8), EINECS EC Number: 233-267-9, Molecular Formula: Na2SeO3-5H2O or (Na2O3Se), Molecular Weight: 263.01 or (172.95)

Specifications of Commercial Pure Selenious Acid
CAS Number 7783-00-8
Molecular formula: H2SeO3
Molecular weight: 128.97
Description: White to off-white hygroscopic crystalline mass.
Residue on ignition: Max. 0.1 %.
Assay: Between 93.0% and 101.0%.

Selenious Acid USP Grade
H2SeO3 -- 128.97
Selenium dioxide, monohydrated.
Selenious acid [CAS Number 7783-00-8].
Selenious Acid contains not less than 93.0 percent and not more than 101.0 percent of H2SeO3.

Identification
A: Dissolve about 50 mg in 5 mL of water, add about 100 mg of sodium bicarbonate, and mix: gas bubbles develop.
B: Dissolve about 50 mg in 5 mL of 0.1 N hydrochloric acid, and add about 50 mg of stannous chloride: a curdy tan-orange precipitate is formed.

Tests
Residue on ignition: not more than 1.0 mg, from 10.0 g (0.01%).
Insoluble matter: Dissolve 1 g in 5 mL of water: it dissolves completely and the solution is clear.
Selenate and sulfate: Dissolve about 0.5 g in 10 mL of water, add 0.1 mL of hydrochloric acid and 1 mL of barium chloride, and mix: no turbidity or precipitate is formed in 10 minutes.
Assay: Transfer about 100 mg of Selenious Acid, accurately weighed, to a suitable glass-stoppered flask, and dissolve in 50 mL of water. Add 10 mL of potassium iodide solution (3 in 10) and 5 mL of hydrochloric acid, mix, insert the stopper in the flask, and allow to stand for 10 minutes. Add 50 mL of water and 3 mL of starch, and titrate with 0.1 N sodium thiosulfate until the solution is colorless, then titrate with 0.1 N iodine VS to a blue endpoint. Subtract the volume of 0.1 N iodine from the volume of 0.1 N sodium thiosulfate to obtain the volume of 0.1 N sodium thiosulfate equivalent to selenious acid. Each mL of 0.1 N sodium thiosulfate is equivalent to 3.225 mg of H2SeO3.

Sodium Selenite Pentahydrate BP Ph Eur Grade Specifications
Ph Eur
Na2SeO3,5H2O -- 263.0 -- CAS 26970-82-1

CHARACTERS
Appearance: White or almost white, crystalline powder, hygroscopic.
Solubility: Freely soluble in water, practically insoluble in ethanol (96 per cent).

For Original Monographs of IP Indian Pharmacopoeia BP British Pharmacopoeia USP US Pharmacopoeia FCC Food Grade product, please check with the respective web-pages or books.

Anmol Chemicals
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