Formulation development typically takes 4 to 10 weeks depending on complexity. Challenge testing adds another 4 to 6 weeks because ISO 11930 requires a 28-day incubation period plus lab turnaround time. Total timeline from brief to validated formula is commonly 8 to 16 weeks. Posting your brief early through the AJ Cosmo Labs app and selecting a chemist with existing natural preservation experience can reduce the iteration cycles and compress that timeline.
Read the full guide on cosmetic chemist who works with natural preservative systems →