Selenium Sulfide

Synonyms: Selenium sulphide
CAS Number: 7488-56-4, Molecular Weight: 143.09, Chemical Formula: SeS2, EINECS EC Number: 231-303-8, FEMA: ----,

Selenium Sulfide USP Grade Specifications
SeS2 143.09 -- CAS 7488-56-4.

Selenium Sulfide contains not less than 52.0 percent and not more than 55.5 percent of selenium (Se).

Identification:
A: Filter 20 mL of the solution of Selenium Sulfide prepared as directed in the Assay, and to 10 mL of the filtrate add 5 mL of water and 5 g of urea. Heat to boiling, cool, and add 2 mL of potassium iodide solution (1 in 10): a yellowish orange to orange color is produced, and it darkens rapidly (presence of selenium).
B: Allow the solution obtained in Identification test A to stand for 10 minutes, filter, and to the filtrate add 10 mL of barium chloride: the solution becomes turbid (presence of sulfur).