Sodium Selenite Pentahydrate BP Grade
Na2SeO3,5H2O -- 263.0 -- 26970-82-1
Content: 98.5 per cent to 101.5 per cent.
Appearance: White or almost white, crystalline powder, hygroscopic.
Solubility: Freely soluble in water, practically insoluble in ethanol (96 per cent).
A. 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.
Solution S: Dissolve 5.0 g in carbon dioxide-free water and dilute to 50.0 ml with the same solvent.
Appearance of solution: Solution S is clear and colourless.
pH: 9.8 to 10.8 for solution S.
Chlorides: Maximum 50 ppm.
Sulphates and selenates: Maximum 300 ppm (determined as sulphates).
Iron: Maximum 50 ppm.
Shelf life, Storage and Packing
It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.
GLP, cGMP (FDA) Approved, WHO-GMP, ISO 9001: 2015, ISO14001:2015, OHSAS18001:2007, FSSC 22000: 2005, FSSAI, Kosher and Halal Certified.