IFRA Standards and the Code of Practice: Structure, Scope and Application
What the Standards actually are
The IFRA Standards are a set of use restrictions adopted by the International Fragrance Association and administered through its Code of Practice. They are not law; they become binding through contracts, industry self-regulation, and - critically - through national or regional regulation that references them (for example, cosmetic rules in the EU that treat IFRA restrictions as the benchmark for fragrance ingredients). A candidate must understand the hierarchy: the Code of Practice sets the governance and the process, while the individual Standards set the limits.
The amendment cycle and transition rules
Standards are periodically amended. Each amendment has a publication date and an entry-into-force date, and there is usually a transition period during which product already placed on the market may continue to be sold. The classic exam trap is confusing the date a Standard is notified with the date it applies. Another trap: assuming a new amendment invalidates old stock immediately. Read the transitional provisions carefully - they typically distinguish between products placed on the market before the entry-into-force date and products manufactured after it.
Types of restriction
Restrictions come in several forms: a simple concentration limit, a limit expressed per product category, a prohibition, a specification or purity requirement, and a requirement for the presence of a substance to be declared. Some Standards restrict the ingredient itself; others restrict a constituent or a contaminant that may be present in a natural raw material. Candidates must be able to tell which entity the limit applies to - the added fragrance compound, the finished product, or the raw material.
Worked rule of thumb
If a Standard gives a limit of 0.1% in a leave-on product and your compound contains 5% of the restricted material, the maximum compound level is 0.1 ÷ 0.05 = 2% of the finished product. Always convert to the same basis before comparing, and check whether the limit is expressed on the finished cosmetic or on the fragrance concentrate.
Traps to expect
Questions often test whether a restriction applies to all product categories or only some; whether a substance is prohibited outright or merely restricted; and whether the obligation falls on the fragrance house or the brand owner.