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T-BUTYL P-CRESOL.

Valuable CAS 29759-28-2 / NOT REPORTED

T-BUTYL P-CRESOL, also known as Butylated Hydroxytoluene (BHT), is a synthetic, oil-soluble compound primarily valued for its antioxidant and preservative properties within cosmetic formulations. Its key function is to safeguard product integrity by preventing the degradation of other ingredients through oxidation.

Summary

antioxidant preservative

Science

Mechanism of Action

As a synthetic analog of vitamin E, T-BUTYL P-CRESOL acts by inhibiting the autoxidation of unsaturated organic compounds within product formulations. It achieves this by converting reactive peroxy radicals into more stable hydroperoxides, thereby preventing free radical formation and slowing down oxidation rates. Its role is predominantly formulation-centric, stabilizing ingredients and extending product shelf-life rather than conferring direct active benefits to the skin.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

T-BUTYL P-CRESOL is a lipophilic, fat-soluble compound exhibiting high thermal and chemical stability, though it is light-sensitive.

Conflicts

  • acid chlorides
  • acid anhydrides
  • brass
  • copper
  • copper alloys
  • steel
  • bases
  • oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
0.8%
Sensitization risk Unknown

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that BHT is safe for use in cosmetic formulations. Typical concentrations range from 0.01% to 0.1%, with a maximum reported concentration in leave-on products of 0.5%. The Scientific Committee on Consumer Safety (SCCS) also issued an opinion in December 2021 affirming its safety in cosmetics at concentrations up to 0.8% in both rinse-off and non-rinse-off products. The U.S. FDA recognizes BHT as 'generally recognized as safe' (GRAS) for small amounts in foods.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

T-BUTYL P-CRESOL is a valuable formulation ingredient, critical for preventing product degradation and extending shelf-life by inhibiting oxidation within the cosmetic formula.

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