Biotin

Biotin, also called vitamin B7, is a water-soluble vitamin. The recorded grade is D-biotin supplied as a white to off-white crystalline powder. A pure vitamin grade should be distinguished from a diluted biotin preparation containing carriers.

The recorded specification lists a D-biotin assay range of 97.5–102.0% by HPLC. This is an analytical acceptance range, not a claim that a preparation contains more than its total mass in vitamin. Confirm the assay basis in the current specification.

For formulation, calculate vitamin contribution from the actual grade and assay rather than the total weight of a diluted blend. Assess mixing uniformity and compatibility with the other ingredients. Physical form and processing conditions can affect incorporation.

Request the technical sheet and lot certificate, including identity, assay and relevant impurity controls. Confirm any carriers or additional ingredients, together with packaging and storage guidance. Do not apply a pure-grade certificate to a differently formulated biotin product.