THIODIPROPIONIC ACID is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.
THIODIPROPIONIC ACID
Safety grade: A
Thiodipropionic acid is a synthetic compound that acts as an antioxidant and preservative helper in skincare products. It works by protecting the product's beneficial ingredients from breaking down due to exposure to air and light.
This ingredient conditions the skin by protecting the formula's active ingredients from oxidation, helping to maintain product efficacy and prevent rancidity while supporting skin hydration and barrier function.
Graded using: COSING, FDA.
Last verified: May 26, 2026
Other Skin Conditioning ingredients
- TOCOPHEROL — Grade A
- PROPYLENE GLYCOL — Grade A**
- XANTHAN GUM — Grade A
- DIMETHICONE — Grade A
- TOCOPHERYL ACETATE — Grade A
- PANTHENOL — Grade A
- CAPRYLYL GLYCOL — Grade A
- ETHYLHEXYLGLYCERIN — Grade A