The diammonium salt of dithiodiglycolic acid, listed as a hair waving or straightening ingredient.
What it is
Diammonium dithiodiglycolate is diammonium 2,2'-dithiodiacetate, the ammonium salt of dithiodiglycolic acid, the disulfide formed when two molecules of thioglycolic acid are joined. CosIng lists it as a hair waving or straightening 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.
Functions
- 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).
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.