At a glance
| Chemical family | Nitro musk — synthetic fragrance compound (trinitro aromatic) |
| CAS number | 81-15-2 |
| Classification | IARC Group 3 (not classifiable as to carcinogenicity, Monographs Vol. 65, 1996). EU restricted in cosmetics (1% fine fragrance, 0.03% other). IFRA restricted. Persistent and bioaccumulative. Detected in breast milk |
| Where you encounter it | Fragranced laundry products; some perfumes (restricted concentration); soap; household cleaners; transfers to bedding via wash cycle |
| Sleep micro-environment relevance | Transferred to sheets and pillowcases through fragranced laundry products. Persistent on textiles — designed to survive drying and wear cycles. Direct skin contact during sleep |
Regulatory & certification status
| European Union | Cosmetics Regulation Annex III limits musk xylene to 1.0% in fine fragrance and 0.03% in other cosmetic products. Not permitted in oral hygiene products. SCCS has recommended further restrictions. Regulatory |
| United States | No specific restriction on musk xylene in consumer products. FDA does not limit individual fragrance chemicals. Regulatory |
| Canada | Health Canada DSL listed. No specific consumer product restriction. Regulatory |
| International | IARC Group 3 (Monographs Vol. 65, 1996). IFRA restricts use. EU cosmetics regulation limits concentration. OSPAR List of Substances of Possible Concern. Regulatory |
What it is
Musk xylene is a trinitroaromatic compound used as a synthetic musk fragrance since the 1890s. IARC evaluated it in 1996 and classified it as Group 3. Unlike musk ketone, musk xylene has three nitro groups and is more heavily restricted. The EU limits it to 1% in fine fragrance and 0.03% in other leave-on cosmetic products. The SCCS has noted concerns about photomutagenicity, bioaccumulation, and environmental persistence. Musk xylene is detected in human breast milk, blood, and adipose tissue, confirming systemic exposure and accumulation. It has been largely phased out of high-end fragrances but may persist in some budget cleaning products and in regions with less stringent regulations.
Where it shows up in bedding
Musk xylene enters bedding through the same laundry-product pathway as musk ketone: fragranced detergents and fabric softeners deposit the compound onto textile fibres during washing. Musk xylene is designed to be persistent — it adsorbs strongly to fabric and survives the drying cycle, providing long-lasting fragrance between washes. This persistence means musk xylene remains on sheets and pillowcases throughout the sleep period, in direct contact with skin. Detection of musk xylene in breast milk confirms that dermal absorption from contaminated textiles contributes to systemic body burden. Fragrance-free laundry products eliminate this exposure pathway.
Citations
- IARC (1996). Musk xylene. IARC Monographs Vol. 65. Source Peer-reviewed
- Reiner, J.L. and Kannan, K. (2006). A survey of polycyclic musks in selected household commodities from the United States. Chemosphere, 62(6): 867-873. Source Peer-reviewed
- EU Cosmetics Regulation (EC) No 1223/2009, Annex III — Restricted Substances. Source Regulatory
Frequently asked questions
Why is musk xylene more restricted than musk ketone?
Musk xylene has three nitro groups (versus two for musk ketone), making it more persistent, more bioaccumulative, and of greater regulatory concern. The EU limits musk xylene to much lower concentrations in cosmetics (0.03% in leave-on products versus higher limits for musk ketone). Both are IARC Group 3, but musk xylene's environmental persistence and detection in breast milk have driven stricter controls.
How do I avoid nitro musks on my bedding?
Switch to fragrance-free laundry detergent and skip fabric softener. Nitro musks and other synthetic fragrances are added to laundry products specifically to persist on textiles — they are designed to stay. Fragrance-free products eliminate the source. If you prefer scented laundry, products using essential oils do not contain nitro musks, though they may contain other fragrance allergens.
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.