An extract of the bitter wood of Quassia amara, listed as a denaturant, skin-conditioning and tonic ingredient.
What it is
Quassia amara wood extract is an extract of the wood of quassia (bitterwood), Quassia amara, of the family Simaroubaceae, known for its very bitter taste. CosIng lists it as a denaturant, skin-conditioning and tonic ingredient.
Where it is used
Appears on the ingredient lists of a small number of products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
The INCI name does not reveal the extraction method or solvent.
Functions
- Denaturant
- Rendering cosmetics unpalatable. Mostly added to cosmetics containing ethyl alcohol to make it unsuitable for ingestion.
- Skin conditioning
- Maintaining the skin in good condition.
- Tonic
- Producing a feeling of well-being on skin and hair.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.

