If you choose to purchase pure powder for personal formulation:
Pure hydroquinone (often 99% purity) is typically sold through chemical supply houses and specialized cosmetic ingredient retailers rather than standard beauty stores. buy pure hydroquinone powder
: You may find listings on eBay or Amazon from third-party sellers, but purity and storage conditions can be difficult to verify. Regulatory and Safety Considerations If you choose to purchase pure powder for
: OTC products were previously capped at 2%. Using pure powder makes it very easy to accidentally create a 10% or 20% solution, which can cause severe chemical burns or Ochronosis (a permanent blue-black skin discoloration). Using pure powder makes it very easy to
: Ensure you are buying "USP Grade" (United States Pharmacopeia), which is safe for pharmaceutical/cosmetic use, rather than "Technical Grade," which is meant for industrial photography or dye manufacturing.