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Name of Product Selenious Acid
Pharmacopoeial Name Selenious Acid USP
Synonyms SELENIOUS ACID, Selenous acid, 7783-00-8, Selenious acid (H2SeO3), UNII-F6A27P4Q4R
CAS No 7783-00-8
Molecular Formula H2SeO3
Pubchem CID 1091
Pubchem SID 462770287
WC Available soon
US-DMF Available soon


SR. No Criteria Limit/Specification
1 Appearance and Odor Colorless or white crystals, efflorescent in dry air and hygroscopic in moist air
2 Solubility Soluble in water and in alcohol
Test-A Meets the Requirement - Gas bubbles develop Complies
Test-B Meets the Requirement - A curdy tan-orange precipitate is formed.
Residue on Ignition (ROI) NMT 0.01% (1 .0mg)
Insoluble Matter Dissolves completely, and the solution is clear
Selenate and Sulfate No turbidity or precipitate is formed in 10 minutes
5 Assay (By Titration) NLT 93.0% and NMT 101.0% of H2SeO
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