Sodium Selenite Pentahydrate

Sodium Selenite Pentahydrate BP Eur Grade SpecificationsEurNa2SeO3,5H2O -- 263.0 -- CAS 26970-82-1

DEFINITIONContent: 98.5 per cent to 101.5 per cent.

CHARACTERSAppearance: White or almost white, crystaler, hygroscopic.Solubility: Freely soluble in water, practically insoluble in ethanol (96 per cent).

IDENTIFICATIONA. Dissolve 50 mg in 5 ml of a mixture of equal volumes of dilute hydrochloric acid and water and heat to boiling. Add 0.05 g of ascorbic acid; a red precipitate is formed which may become black.B. Dissolve 50 mg in a mixture of 1 ml of dilute hydrochloric acid and 5 ml of water. Add 1 ml of barium chloride solution; the solution remains clear.C. It gives reaction of sodium.D. It complies with the limits of the assay.