Selenium Sulfide USP
Abstract
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.
Use/Application
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.
Identity
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.
Other
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We observe WHO Good manufacturing practice and Good laboratory practice.
