When you see the word “fragrance” or “parfum” on an ingredient list, it is not a single ingredient. It is a formulation of potentially dozens to hundreds of individual chemical compounds, concealed behind a single word as a trade secret. This legal protection was designed to prevent competitors from reverse-engineering perfume formulas. It has become the largest single loophole in cosmetic ingredient regulation.
The fragrance loophole
In both the US and the EU, cosmetic manufacturers are permitted to list the entire fragrance formula as a single ingredient, “fragrance” in the US or “parfum” in the EU, without disclosing the individual components. The International Fragrance Association (IFRA) maintains a database of approximately 3,000 fragrance ingredients that members use. A single fragrance formulation typically contains 20 to 100 individual compounds, and some complex fragrance compounds contain more. None of these are visible to the consumer reading the label.
What is inside fragrance
The Campaign for Safe Cosmetics and the EWG have conducted analyses of fragrance formulations and found chemicals including phthalates, synthetic musks (galaxolide, tonalide, which are persistent bioaccumulative toxins), sensitisers associated with allergic reactions, and compounds with limited or no safety data. A 2016 EWG analysis found that the average fragrance product contains 14 chemicals not listed on the label, and that 80% of these chemicals have not been assessed for safety by the independent safety panel that the industry nominally relies upon. This is not a fringe finding: it is a structural feature of how fragrance regulation works.
Phthalates and fragrance
Diethyl phthalate (DEP) is one of the most common phthalate compounds used in fragrance formulations. Unlike DEHP and DBP, which are restricted in cosmetics in the EU, DEP has no restriction in most jurisdictions and is widely used as a solvent and fixative in synthetic fragrance. Because it is part of the fragrance formula, it does not have to be listed by name. Studies that have tested fragrance-containing personal care products have found phthalates in the majority of them. Because these products are applied daily to skin, phthalates from fragrance represent a meaningful and constant exposure route.
Natural versus synthetic
Natural fragrance (essential oils, botanical extracts) can also cause sensitisation and allergic reactions in some people. The distinction is not that natural fragrance is risk-free, but that it does not contain the phthalate carriers, synthetic musks, and petrochemical compounds that characterise most synthetic fragrance formulations. A product listing specific essential oils as fragrance ingredients (e.g., lavender oil, bergamot oil) is more transparent than a product listing only “fragrance”. Fragrance-free products, in practice, typically contain masking fragrances to neutralise the smell of base ingredients, which are still synthetic. Truly unscented products are preferable.
What to do
The most effective action is to eliminate synthetic fragrance from leave-on products: moisturisers, deodorant, body lotion, and sunscreen. These products are applied to large skin surface areas and worn continuously. Replace with fragrance-free or natural-fragrance equivalents. For cleaning products, replacing all-purpose sprays and laundry detergent with fragrance-free versions (Seventh Generation Free and Clear, Branch Basics) eliminates the inhalation and skin contact route from cleaning chemistry. Plug-in air fresheners, fabric sprays, and scented candles are also high-exposure sources to eliminate first.