: Never "eyeball" measurements. Use a milligram scale to ensure your final formulation stays within safe limits (typically 2% to 4%).
: Always request a Certificate of Analysis (CoA) from the vendor to verify the purity and ensure it is free from heavy metal contaminants. buy pure hydroquinone powder
: In the United States, the 2020 CARES Act effectively removed over-the-counter (OTC) hydroquinone products from the market. While buying the raw powder for research or manufacturing isn't strictly prohibited for individuals, selling finished products containing it without an approved New Drug Application (NDA) is illegal. : Never "eyeball" measurements
: Websites like Lotioncrafter , MakingCosmetics , and Bulk Apothecary often carry high-purity active ingredients for formulators. : In the United States, the 2020 CARES
: Companies like Sigma-Aldrich or Fisher Scientific provide laboratory-grade hydroquinone, though they often require a business or institutional account.
Pure hydroquinone (often 99% purity) is typically sold through chemical supply houses and specialized cosmetic ingredient retailers rather than standard beauty stores.