Selenium Sulfide is an inorganic selenium-containing cosmetic ingredient also known as Selenium Disulfide. It is represented chemically as SeS₂ and has CAS Number 7488-56-4. The material is generally supplied as a fine orange to reddish-orange powder and is characterized by its low water solubility and selenium content.
Selenium Sulfide has a long history of use in scalp-care and cleansing formulations, particularly products intended for anti-dandruff and scalp-care applications. Its technical properties make particle size, purity, selenium content and control of soluble selenium compounds important considerations when selecting the raw material.
Because Selenium Sulfide is a regulated substance in several markets, cosmetic manufacturers should evaluate the applicable legislation and product category before incorporating it into a finished formulation.
Selenium Sulfide has the molecular formula SeS₂ and a molecular weight of 143.09 g/mol. It is commonly identified by the alternative chemical name Selenium Disulfide and may also be described as Selenium(IV) Disulfide.
The USP monograph specifies Selenium Sulfide based on its selenium content, with an official range of 52.0–55.5% selenium (Se). The USP identification procedure establishes the presence of selenium and sulfur, while the monograph also specifies residue on ignition NMT 0.2% and a limit for soluble selenium compounds. The USP assay is based on selenium determination rather than a conventional HPLC assay, so an HPLC assay should not be stated unless supported by the actual product's validated analytical method.
Commercial micronized grades can have additional controls such as particle-size distribution, moisture, sulfur content and elemental impurities. These parameters are supplier/product-specific and should be confirmed from the applicable COA.
Selenium Sulfide is primarily associated with scalp-care and anti-dandruff formulations. Its antimicrobial-related activity and interaction with the scalp environment have made it a specialized ingredient for certain hair-care products.
The ingredient is particularly relevant where formulation developers require a controlled active material for shampoos and other rinse-off scalp formulations. Particle size can influence dispersion, appearance and formulation behavior, making micronized material useful for applications where uniform distribution is required.
Due to its regulatory and toxicological profile, Selenium Sulfide should not be treated as a general-purpose cosmetic ingredient. The finished formulation, intended application, concentration and target market should all be evaluated before use.
Selenium Sulfide is primarily associated with:
In the European Union, the current cosmetic restriction specifically identifies shampoos as the permitted product type and sets a maximum concentration of 1%, subject to the applicable conditions and warning statement.
This regulatory limit should not automatically be applied to other countries or product categories. Finished-product manufacturers should verify the regulations applicable to their intended market.
Selenium Sulfide is practically insoluble in water, so formulation development requires attention to dispersion, particle size, suspension stability and uniform distribution. Micronized grades may provide different processing characteristics from conventional powders.
The raw material should be stored in well-closed containers under suitable controlled conditions. The product should also be handled according to its applicable safety documentation because selenium compounds require appropriate occupational controls.
Quality evaluation can include selenium assay, identification, residue on ignition, soluble selenium compounds, moisture, elemental impurities and particle-size characteristics. The exact analytical panel should be based on the intended grade and the manufacturer's approved specification.
For international cosmetic manufacturing, regulatory review is particularly important because the legal status and permitted concentration of Selenium Sulfide vary by jurisdiction.
Selenium Sulfide is a specialized cosmetic ingredient requiring controlled raw-material quality and appropriate analytical characterization. A Selenium Sulfide Cosmetic Ingredient Manufacturer in India can support cosmetic and personal-care manufacturers requiring material for specialized scalp-care formulations.
For bulk procurement, buyers should evaluate selenium content, particle characteristics, impurity profile, packaging, documentation and batch-to-batch consistency. A reliable Selenium Sulfide supplier in India should provide product-specific technical documentation and a certificate of analysis corresponding to the supplied grade.
Selenium Sulfide can therefore be positioned as a specialized cosmetic raw material and personal care ingredient for manufacturers developing regulated scalp-care and anti-dandruff products.
| Parameter | Specification |
|---|---|
| Appearance | White or colourless crystals / white powder |