Selenous acid is the principal oxoacid of selenium, the other being selenic acid. Selenous acid is analogus to sulfurous acid, but it is more readily isolated. Selenous acid is formed upon the addition of selenium dioxide to water. It is colorless crystal granule.

Selenious Acid H2SeO3 98% Min 60.4% Min

FORMULA: H 2 SeO 3

MOLECULAR WEIGHT: 128.97

CAS No.: 7783-00-8

EINECS NO.:231-974-7

CHARACTERISTIC: Colorless hygroscopic crystal powder. has deliquescence, soluble in water and ethanol.

USAGE: Major used in changing the color of steel, the so-called”blueing” process which uses selenous acid, copper(II) nitrate, and nitric acid to change the color of the steel from silver-grey to blue-grey. Another use for selenious acid is the chemical darkening and patination of copper, brass and bronze, producing a rich dark brown color that can be further enhanced with mechanical abrasion.

Selenious acid is a key component of the Mecke reagent used for drug testing

Used for chemical reagent, reducing agent etc. As activator used for plating industry.

PACKING: Net 25kg fiber or iron drum.

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