Seleninic acid (H2SeO3)-Powder introduce:
Selenous acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally, it is more accurately described by (HO)2SeO. It is the principal oxoacid of selenium; the other being selenic acid.
Molar mass:128.97 g/mol
Appearance:white hygroscopic crystals
Melting point:decomposes at 70°C
Solubility in water:very soluble
Solubility:soluble in ethanol
Acidity (pKa):2.46, 7.3 Conjugate base Hydrogenselenite
Magnetic susceptibility (χ):−45.4·10−6 cm3/mol
Selenous acid is used in steel guns, wherein it changes the color of the steel from silver-grey to blue-grey. It serves as an important component of the Mecke reagent, which is utilized for drug testing. It acts as a source of selenium. It acts as a reagent for alkaloids and an oxidizing agent. Further, it is used in labeling radiopharmaceuticals. It is involved in the organic synthesis for the preparation of glyoxal.
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