What is IFRA?

IFRA (International Fragrance Association) is the self-regulatory body of the fragrance industry, headquartered in Geneva. Since 1973, IFRA has published safety standards based on the research of RIFM (Research Institute for Fragrance Materials). These standards are updated through numbered Amendments — the current is the 52nd Amendment (2024).

IFRA Standards are not law, but they are treated as mandatory by the global fragrance industry. Major fragrance houses (Givaudan, IFF, Firmenich, Symrise) and most indie brands comply fully. The EU Cosmetics Regulation increasingly references IFRA data.

The 11 IFRA Product Categories

IFRA divides consumer products into 11 categories based on exposure level — from the most restrictive (lip products) to the least restrictive (household products not in contact with skin). Each ingredient has a maximum allowed concentration per category.

Types of IFRA Restrictions

• Prohibition — The ingredient is completely banned from use in any fragrance application. Example: nitromusks (musk ambrette, musk tibetene).
• Restriction — The ingredient can be used but only up to a maximum concentration in the finished consumer product. This limit varies by category (see above).
• Specification — The ingredient can be used only if it meets certain purity requirements (e.g., peroxide value, furocoumarin content, safrole level).
• Not Restricted — No IFRA standard exists; the ingredient can be used at the formulator’s discretion (subject to local regulations like EU Cosmetics Regulation).

How to Read an IFRA Certificate

Every fragrance oil sold commercially comes with an IFRA Certificate of Conformity. Here’s how to read it:

• Amendment number — Which version of IFRA Standards the certificate is based on (current: 52nd)
• Fragrance name / code — The product identifier
• Category compliance table — Shows the maximum safe use level for each of the 11 categories. If a category shows “—” or “Not suitable,” the fragrance exceeds limits for that application.
• Restricted ingredients listed — Any IFRA-restricted materials present in the formula and their concentrations
• Allergen declaration — The 26 EU declarable allergens and their concentrations (for EU compliance)

EU 26 Declarable Allergens

The EU Cosmetics Regulation requires that 26 specific fragrance allergens be listed on product labels when they exceed threshold concentrations (10 ppm for leave-on products, 100 ppm for rinse-off). These include:

• Common in natural materials: Linalool, limonene, citronellol, geraniol, citral, eugenol, coumarin, farnesol, benzyl alcohol, benzyl benzoate
• Common in synthetics: Alpha-isomethyl ionone, butylphenyl methylpropional (BMHCA/Lilial — now banned), hydroxyisohexyl 3-cyclohexene carboxaldehyde (Lyral — now banned)
• Rare in modern formulation: Evernia prunastri (oakmoss extract), evernia furfuracea (treemoss extract), methyl 2-octynoate

Note: Lilial (BMHCA) and Lyral (HICC) have been banned in the EU since March 2022 and August 2021 respectively, but remain on the allergen list for labeling purposes.