A basic preservative efficacy challenge test (ISO 11930 or USP 51) typically takes 28–35 days at an accredited lab. A full safety assessment, including raw material review and toxicological profile, adds another 2–4 weeks depending on formula complexity. Dermatologist patch testing for sensitive skin claims can require 6–8 weeks. Planning your regulatory timeline early—ideally before finalizing your manufacturing run—avoids costly launch delays. AJ Cosmo Labs chemists can help you sequence testing efficiently.
Read the full guide on FDA requirements a cosmetic chemist helps with →