A synthetic oxazolidinone with a decyl chain, used as an emollient and antimicrobial.
What it is
Decyloxazolidinone is 4-decyl-2-oxazolidinone, a heterocyclic compound carrying a C10 alkyl chain. CosIng lists it as an antimicrobial, emollient, plasticiser, skin-conditioning ingredient and cleansing surfactant.
Where it is used
Found in deodorants, creams, cleansers and other 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 label does not show the amount used.
Functions
- Antimicrobial
- Preventing and/or slowing down microbial growth.
- Skin conditioning – emollient
- Acting as lubricants on the skin surface providing the skin with a soft and smooth appearance.
- Plasticiser
- Softening and making supple synthetic polumers that otherwise could not be easily deformed, spread or worked out.
- Skin conditioning
- Maintaining the skin in good condition.
- Surfactant – cleansing
- Wetting body surfaces, emulsifying or solubilizing oils, and suspending soil (generally, such ingredients contribute to the foaming and lathering properties of cleansing products).
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.

