Category IFRA

If you’ve ever opened the IFRA Standards library, you’ll have noticed that every restriction is tied to a specific “category”. Category 1. Category 4. Category 12. Sometimes even multiple categories at once. This is where many perfumers get confused —…

If you’re formulating perfume seriously, at some point you run into IFRA limits. And this is usually where things get confusing. You see numbers like 0.3%, 0.6%, Category 4, Category 12… and suddenly your beautifully structured formula feels like it’s…