A succinylated derivative of the amino acid cystine, used as a hair-conditioning ingredient.
What it is
Tetrasodium disuccinoyl cystine is the tetrasodium salt of N,N'-bis(3-carboxy-1-oxopropyl)-L-cystine, a derivative of the sulfur-containing amino acid cystine in which both amino groups carry a succinic acid residue. CosIng lists it as a hair-conditioning ingredient.
Where it is used
Found in hair care products such as treatments and conditioners.
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 list does not show the concentration used.
Functions
- Hair conditioning
- Enhancing the appearance and feel of hair. Leaving the hair easy to comb, supple, soft and shiny and/or imparting volume, lightness, gloss, texture, etc.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.