Thioglycerin
Thioglycerin is a keratolytic and hair waving or straightening ingredient. It’s in 4 products on Poliage. Avoid lists on Poliage that include it: none.
Updated October 21, 2026
What it does
Contains Thioglycerin: depilatory
Function listed in CosIng
Contains Thioglycerin: hair-waving-or-straightening
Function listed in CosIng
Contains Thioglycerin: keratolytic
Function listed in CosIng
Contains Thioglycerin: reducing
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 38586, accessed October 22, 2026. Also listed as monothioglycerol.
Products that contain Thioglycerin
L’Oréal
100% ultra color Noir bleu 210
Lists fragrance, fragrance allergens, drying alcohol, silicones
L’Oréal
Olia coloration permanente 6.66 carmin éclatant
Lists fragrance, drying alcohol, silicones
L’Oréal
PRODIGY 6.0 LIN Blond foncé
Lists fragrance, fragrance allergens, drying alcohol, exfoliating acid, silicones
L’Oréal
Фарба для волосся L’Oreal Paris Preference 5.0
Lists fragrance, fragrance allergens, drying alcohol, silicones, chemical UV filters, salicylic acid
Related guides
How to read an ingredient list
What the ingredient list on a beauty product tells you, what the names mean, and what it leaves out, using FDA and EU labeling rules.
Does ingredient order show how much is in a product?
Ingredient lists run from most to least, but only down to 1%. Below that, any order is allowed. What the order shows and what it hides.
How do you patch test a new product?
What the AAD, FDA and DermNet say about testing a small area, the FDA hair dye skin test, in-office patch tests, and contact allergy basics.