Healthy indoor air quality
The impact of ambient fragrances from diffuseurs or air fresheners on our health
...essential oils are similar to those found in other fragrances. Each essential oil product tested contained at least one substance that is classified as toxic.
For pure essential oils, previous studies (eg Chiu et al., 2009) demonstrated that VOCs such as benzene and toluene were released when oils were heated to 40°C. ...
