At a glance
| Chemical family | Branched-chain alcohol — hydrolysis product of 2-ethylhexyl ester plasticizers (DEHP, DEHA) |
| CAS number | 104-76-7 |
| Classification | Not classified by IARC. EU CLP Eye Irrit. 2, Skin Irrit. 2. Sensory irritant at low indoor air concentrations. No official indoor air quality guideline in most jurisdictions |
| Where you encounter it | Indoor air from PVC flooring, vinyl wallcoverings, and sealants; degradation product of DEHP and other phthalate plasticizers; also used as a solvent and in the manufacture of 2-ethylhexyl acrylate |
| Sleep micro-environment relevance | One of the most common indoor air complaint chemicals. Elevated in bedrooms with new PVC flooring or vinyl wallcoverings. Sensory irritant that can affect sleep quality through eye and mucous membrane irritation |
Regulatory & certification status
| European Union | REACH registered substance. CLP Eye Irrit. 2 (H319), Skin Irrit. 2 (H315). No specific indoor air quality guideline. Recognised as an indicator of plasticizer degradation in building investigations. Regulatory |
| United States | No EPA indoor air quality guideline. No OSHA PEL specific to residential settings. NIOSH REL: 50 ppm (TWA) — occupational. Regulatory |
| Canada | No Health Canada indoor air quality guideline for 2-EH. Recognised in building science literature as an indoor air quality indicator. Regulatory |
| International | Not IARC classified. WHO does not set indoor air quality guidelines for 2-EH. Widely recognised in building science and indoor air quality investigation as a principal complaint chemical from PVC degradation. Regulatory |
What it is
2-Ethylhexanol is a C8 branched primary alcohol. It is produced industrially on a massive scale as a precursor to DEHP and other 2-ethylhexyl esters. In the indoor environment, it appears as a degradation product — when DEHP and related plasticizers in PVC products undergo hydrolysis (reaction with moisture, particularly in concrete floor slabs), they release 2-ethylhexanol as a volatile by-product. This makes 2-EH an indicator of plasticizer degradation rather than a direct emission. IARC has not evaluated 2-ethylhexanol. It is not considered a carcinogen or reproductive toxicant. The primary concern is sensory irritation — 2-EH has a sweet, slightly chemical odour detectable at concentrations as low as 1 mg/m3, and it causes eye, nose, and throat irritation in sensitive individuals at indoor air concentrations commonly found in problem buildings.
Where it shows up in bedding
2-Ethylhexanol is not a bedding ingredient. It enters bedroom air from PVC flooring, particularly when PVC tiles or sheet vinyl are installed over concrete subfloors that have residual moisture. The moisture drives alkaline hydrolysis of DEHP in the PVC backing, releasing 2-EH into the room air. Bedrooms with new PVC flooring or vinyl wallcoverings can have elevated 2-EH concentrations for months after installation. The problem is worse in buildings with poor ventilation and in climates where concrete subfloor moisture is common. For the sleep environment, the practical concern is that occupants in bedrooms with elevated 2-EH may experience headache, eye irritation, and poor sleep quality due to mucous membrane discomfort.
Citations
- Wieslander, G. et al. (1999). Nasal and Ocular Symptoms, Tear Film Stability, and Biomarkers in Nasal Lavage, in Relation to Building-Dampness and Building Design in Hospitals. International Archives of Occupational and Environmental Health, 72(7): 451-461. Source Peer-reviewed
- Nalli, S. et al. (2006). Phytoremediation of 2-Ethylhexanol Released from PVC Flooring. Environmental Science & Technology, 40(4): 1192-1198. Source Peer-reviewed
- ECHA. 2-Ethylhexan-1-ol — Substance Information. Source Regulatory
Frequently asked questions
Why does my new PVC floor smell?
The characteristic smell of new PVC flooring is largely 2-ethylhexanol — a degradation product of the DEHP plasticizer used in PVC. When PVC flooring is installed over a concrete slab that has residual moisture, alkaline hydrolysis breaks down the DEHP and releases 2-EH into the indoor air. The smell is strongest in the first weeks after installation and gradually diminishes as moisture equilibrium is reached and the room is ventilated.
Can 2-ethylhexanol affect sleep?
At elevated indoor air concentrations, 2-ethylhexanol can cause eye irritation, headache, and mucous membrane discomfort — symptoms that can impair sleep quality. If you notice a sweet chemical smell in a bedroom with new PVC flooring, ventilating the room (opening windows) is the most effective short-term control. If symptoms persist, investigating the moisture condition of the subfloor is recommended.
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.