Practical Guide — Phototoxicity & the 3T3 NRU Test
Cosmetic Pharma
View resource →A structured three-step nitrosamine risk framework — evaluation, analysis and control — spanning hazard identification, predicted and confirmatory testing, and mitigation.
GenEvolutioN’s comprehensive nitrosamine risk management framework organises the work into three steps.
Step 1 — Risk evaluation: theoretical hazard identification, documentation review of the risk of nitrosamine and precursor presence, and prediction of N-nitroso compound formation pathways.
Step 2 — Risk analysis: real and predicted level assessment, synthesis and qualification of nitroso-impurities, and estimation of the Acceptable Intake (QSAR / CPCA).
Step 3 — Risk control: confirmation of the Acceptable Intake via the Enhanced Ames Test (EAT), mammalian cell assays (HPRT/MLA) or the micronucleus test, bioactivation studies and a documented control strategy.
Recommended citation
GenEvolutioN Scientific Team (2025). Nitrosamines: Comprehensive Risk Management Framework. GenEvolutioN Technologies.