Selenium Sulfide USP

Selenium sulfide is an inorganic compound with the approximate formula SeS2. Both sulfur and selenium catenate form chains and rings readily, and mixtures of selenium and sulfur likewise give rise to numerous “alloys”. This compound is not an analogue of sulfur dioxide.


Selenium sulfide  is sold as an antifungal agent in shampoos for the treatment of dandruff and seborrheic dermatitis associated in the scalp with Malassezia genus fungi. At the 2.5% strength, selenium sulfide is also used on the body to treat tinea versicolor, a type of fungal skin infection caused by a different species of Malassezia.


Chemical Name: Selenium Sulfide
Mol. Formula: SeS2
Mol. Weight: 143.09 g/mol
CAS No: 7488-56-4


General Specifications

Test Specification…USP
Characters Reddish-brown to bright orange powder, having not more than a faint odor.
Solubility Practically insoluble in water and in organic solvents
Residue on ignition Maximum  0.2%
Soluble selenium compounds Maximum  5 ppm
Organic Volatile Impurities Passes test
Residual solvents Passes test
Assay Not less than 98.0% and more than 102.0%


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.


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We observe WHO Good manufacturing practice and Good laboratory practice.

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