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THIODIGLYCOL.

Questionable CAS 111-48-8 / ANTIOXIDANT

Thiodiglycol is a versatile chemical compound primarily functioning as a solvent and exhibiting antioxidant properties in cosmetic formulations. While it aids in ingredient dissolution, animal studies indicate potential for mild skin irritation and significant ocular irritation.

Solvent Antioxidant

Science

Thiodiglycol primarily functions as a solvent, facilitating the dissolution and dispersion of other components within a formulation. Additionally, it acts as an antioxidant, contributing to the stability of the product and potentially offering protective benefits to the skin.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Thiodiglycol maintains stability under recommended storage conditions; however, it is notably hygroscopic and sensitive to air exposure. Optimal storage requires a cool, dry, and well-ventilated environment, with the container tightly sealed and ideally under an inert gas.

Conflicts

  • Acetone
  • Sodium peroxide
  • Strong acids
  • Strong oxidants

Safety

CIR Status
Not reviewed
Sensitization risk Low

Animal safety assessments indicate thiodiglycol is a mild skin irritant and a moderate to severe ocular irritant. A 500 mg application on rabbit skin demonstrated mild irritation, while 0.5 mL of undiluted thiodiglycol induced a serious reaction in rabbit eyes. It was not identified as a skin sensitizer in animal models. A 90-day oral subchronic toxicity study in rats established a No-Observed-Adverse-Effect Level (NOAEL) for oral toxicity at 500 mg/kg/day.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Questionable

Given the absence of human clinical efficacy data, an unreviewed CIR status, and documented animal irritation, its inclusion in precision skincare formulations is questionable without more comprehensive safety and benefit assessments.


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