Sodium Selenite

Sodium Selenite also known as a Disodium salt of Selenious Acid is a white solid, highly soluble in water, solubility in water : about 85 gms /100ml @ 20°c., but not soluble in ethanol. It has the Mol. Formula Na2SeO3 with Selenium having (+4 )oxidation state. It is prepared by the action of Sodium Hydroxide (NaOH) on Selenious Acid ( H2SeO3). Sodium Selenite is available in two forms as given below: i)The Anhydrous form :As Na2 SeO3, Mol. Wt.: 172.94 gms/mole, CAS No. 10102-18-8 ii) The Hydrous form : As Na2 SeO3.5 H2O known as Sodium Selenite Penta hydrate Mol. Wt.: 263.01gms/mole , CAS No. 26970-82-1 Both these forms behave identically, except that they differ in their Molecular wt. Sodium Selenite finds its application in the Glass Manufacturing Industries for manufacturing colorless glass. It is also used in the preparation of Sodium Selenate. Omkar Speciality Chemicals Ltd. is known as the Leading Manufacturer and Exporter of this product at the most Competitive price with guaranteed Quality Specifications & Timely delivery.

Specifications - Sodium Selenite
Methyl Iodide Producers
Product Sodium Selenite
Structural formula
CAS No. [10102-18-8]
Molecular formula Na2SeO3
Molecular weight 172.94
Description White to off white crystalline powder.
Iron Max. 0.005 %
Sulphate Max. 0. 20%
Loss on drying Max. 0.50%
Selenium Min. 45.00%
Assay Min. 98.50%

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