Look for chemists with a demonstrable portfolio in hydrocolloid or film-forming topical patches, not just general skincare. Ask for stability data from prior patch projects and verify they understand OTC drug monograph rules if you plan to include salicylic acid or benzoyl peroxide. AJ Cosmo Labs lists pre-vetted patch-specialist chemists you can message directly through the iOS app.
Read the full guide on how to find a cosmetic chemist for acne patch formulation →