The ammonium salt of thiolactic acid, a reducing agent used in depilatories and perms.
What it is
Ammonium thiolactate is ammonium 2-mercaptopropionate, the ammonium salt of thiolactic acid, a reducing agent that breaks the disulfide bonds of keratin. CosIng lists it as a depilatory, hair-waving or straightening and reducing ingredient.
Where it is used
Found in hair waving or straightening products and depilatories.
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.
Functions
- Depilatory
- Breaking down the the mechanical strength of hair fibers so that they can be removed by mild scraping/rubbing.
- Hair waving or straightening
- Modifying the chemical structure of the hair, allowing it to be set in the style required (permanent waves or hair straightening).
- Reducing
- Changing the chemical nature of another ingredient by adding hydrogen (or removing oxygen).
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.