A sulphur-containing fatty acid derivative, also known as alpha-lipoic acid, used as an antioxidant.
What it is
Thioctic acid is alpha-lipoic acid, 1,2-dithiolane-3-pentanoic acid, a compound with an eight-carbon chain and a ring containing two sulphur atoms. The CAS number given refers to the racemic form. CosIng lists it as an antioxidant.
Where it is used
Found in a small number of skin care 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 concentration actually used.
Functions
- Antioxidant
- Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.