Selenous Acid (selenious acid) (CAS 7783-00-8)

Molecular structure

Chemical Product

SELENOUS ACID (selenious acid)

Cat. NoKC.1910029 CategoryAcids Molecular FormulaH2O3Se CAS7783-00-8 Molecular Weight128.99 g/mol

Pack sizes 100GM500GM

Safety & Hazards (GHS) Danger

Acute toxic

Health hazard

Environmental hazard

⚠️ For information only; not a substitute for the official Safety Data Sheet (SDS).

Selenous acid is a selenium oxoacid. It is a conjugate acid of a hydrogenselenite.

Used as a reagent for alkaloids, an oxidizing agent, and a medication; A gun-blueing agent (Super Blue or Gun Blue) contains 4% selenious acid and 2.5% cupric sulfate in hydrochloric acid; [HSDB]
AS REAGENT FOR ALKALOIDS; AS OXIDIZING AGENT
(75)SELENIOUS ACID IS REDUCED IN AN AQ BUFFERED SOLN WITH NABH4 WITH THE FINAL PH ADJUSTMENT TO 6.5-7.0 TO YIELD QUANT NAH(75)SE WHICH IS USED TO INTRODUCE (75)SE INTO RADIOPHARMACEUTICALS.
MEDICATION

Physical Description	Selenious acid appears as colorless solid, transparent, colorless crystals. Used as a reagent for alkaloids and as an oxidizing agent. Isotope is used in labeling radiopharmaceuticals. (EPA, 1998)
Color/Form	White hygroscopic crystals.
Melting Point	Decomposes at 158 °F (EPA, 1998)
Density	3.004 at 59 °F (EPA, 1998) - Denser than water; will sink
Solubility	soluble
Vapor Pressure	2 mmHg at 59 °F (EPA, 1998)

IUPAC Name	selenous acid
Molecular Formula	H2O3Se
Molecular Weight	128.99 g/mol
CAS	7783-00-8
SMILES	O[Se](=O)O
InChIKey	MCAHWIHFGHIESP-UHFFFAOYSA-N
Catalog No	KC.1910029
Pack sizes	100GM · 500GM

⚠️ For information only; not a substitute for the official SDS.