At a glance
| Chemical family | Nitro musk — synthetic fragrance compound (nitro aromatic ketone) |
| CAS number | 81-14-1 |
| Classification | IARC Group 3 (not classifiable as to carcinogenicity, Monographs Vol. 65, 1996). Photosensitizer. EU SCCS reviewed. IFRA restricted. Persistent in textiles and environment |
| Where you encounter it | Fragranced laundry detergent and fabric softener (transfers to bedding); perfumes; cosmetics; soap; household fragrance products |
| Sleep micro-environment relevance | Transferred to sheets and pillowcases via fragranced laundry products. Present on bedding during sleep. Photosensitizer — reacts under UV to form nitroaromatic metabolites |
Regulatory & certification status
| European Union | SCCS opinion limits musk ketone in cosmetic products. Regulated under the Cosmetics Regulation. Not banned but subject to concentration limits. Regulatory |
| United States | No specific restriction on musk ketone in consumer products. FDA does not restrict fragrance ingredients individually in cosmetics. Regulatory |
| Canada | Health Canada DSL listed. No specific consumer product restriction. Regulatory |
| International | IARC Group 3 (Monographs Vol. 65, 1996). IFRA restricts use in fragrance formulations. Detected in human breast milk and adipose tissue. Regulatory |
What it is
Musk ketone is one of two major nitro musk fragrances (the other being musk xylene) that were widely used in detergents, cosmetics, and perfumes from the 1950s onward. IARC evaluated musk ketone in 1996 and classified it as Group 3 based on inadequate evidence. The key toxicological concerns are photosensitisation (musk ketone is photomutagenic in bacterial assays when exposed to UV), bioaccumulation (detected in human adipose tissue and breast milk), and environmental persistence. IFRA restricts musk ketone to defined maximum concentrations in fragrance formulations. The EU SCCS has reviewed nitro musks and recommended usage limits. Musk ketone has been largely replaced by polycyclic and macrocyclic musks in premium fragrances but remains in use in some lower-cost laundry and cleaning products.
Where it shows up in bedding
Musk ketone reaches bedding primarily through fragranced laundry detergents and fabric softeners. When sheets, pillowcases, and sleepwear are washed with these products, musk ketone adsorbs onto textile fibres and remains through drying. The compound is designed to be persistent on fabric — the fragrance is intended to last between washes. This means musk ketone is in direct contact with skin for 6-8 hours during sleep. Repeated wash cycles with the same fragranced product build up residual fragrance chemicals on textiles. Switching to fragrance-free laundry products eliminates this exposure pathway.
Citations
- IARC (1996). Musk ketone. IARC Monographs Vol. 65. Source Peer-reviewed
- Rimkus, G.G. (1999). Polycyclic musk fragrances in the aquatic environment. Toxicology Letters, 111(1-2): 37-56. Source Peer-reviewed
- SCCS. Opinion on Nitromusks and Polycyclic Musks in Cosmetics. Source Regulatory
Frequently asked questions
Is musk ketone on my sheets harmful?
At the trace concentrations transferred from fragranced laundry products, musk ketone is not expected to cause acute health effects. However, it is a photosensitizer and has been detected in human tissue, indicating bioaccumulation. For people with fragrance sensitivity or photosensitive skin conditions, switching to fragrance-free laundry products eliminates this exposure.
What is a nitro musk?
Nitro musks are synthetic fragrance compounds containing nitro groups (-NO2) on an aromatic ring. They were developed in the late 19th century as affordable alternatives to natural musk. The two main nitro musks — musk ketone and musk xylene — are persistent in the environment and bioaccumulative. They have been largely replaced in premium fragrances but remain in some consumer cleaning products.
Related compounds
Embr is a sleep environment company researching and addressing the chemistry of the bedroom. Research and product development in progress.
Last reviewed 2026-07-08. If you find a factual error, contact us.