The FDA prohibits mercury compounds (except trace levels in eye-area preservatives), bithionol, chloroform, vinyl chloride in aerosols, and certain halogenated salicylanilides. Color additives must appear on the FDA-approved list. If you sell internationally, EU and California Prop 65 restrictions are stricter. Use a cosmetic chemist to vet your formula before production.
Read the full guide on FDA Requirements for Private Label Cosmetics →