Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate is a high-performance, synthetic antioxidant used primarily to stabilize cosmetic formulations against oxidative degradation. It effectively prevents color changes and rancidity in products containing oils or light-sensitive components, ensuring long-term integrity and shelf-life.
- INCI Name:
- Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
- Chemical/Scientific Name:
- Tetrakis[methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane
- Common Aliases:
- Tinogard TT, Irganox 1010
| Category: | Stabilizers |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Plastics, Food Packaging |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects:
| Formula Stability | |
| Skin Benefits | |
| Irritation Risk |
- Primary Benefits: Prevents product discoloration, protects lipid-based ingredients from rancidity, and extends shelf life.
- Potential Risks: Minimal; regarded as non-sensitizing and non-irritating at standard cosmetic concentrations.
Biological Action & Cosmetic Profile:
Chemists frequently categorize this molecule as a “hindered phenol” antioxidant. Its chemical architecture features a central pentaerythritol core linked to four bulky hydroxyhydrocinnamate groups. These groups allow the molecule to donate hydrogen atoms to free radicals, effectively quenching oxidative chain reactions before they can damage the surrounding medium. Unlike many volatile antioxidants, this substance possesses a very high molecular weight (approximately 1,177 Daltons), ensuring it remains stable and functional even under thermal stress during manufacturing.
The skin-related impact of this ingredient is largely secondary to its role in the container. Because of its large molecular size, it does not penetrate the stratum corneum, meaning it lacks the systemic absorption risks associated with smaller molecules like Bht. While it does provide a layer of antioxidant protection on the skin’s surface, its primary utility is shielding the formula’s active ingredients, such as Ascorbic Acid or botanical extracts, from light-induced and oxygen-induced breakdown.
Formulations containing high concentrations of unsaturated fatty acids or delicate Fragrance components rely on this stabilizer to maintain sensory appeal. It prevents the “off-smells” associated with oil oxidation and ensures that transparent or white emulsions do not turn yellow or brown over time. Its non-polar nature makes it particularly effective in anhydrous balms, sunscreens, and heavy creams.
Broader Applications & Origins:
Beyond the vanity, this compound is a staple in the polymer and plastic industries. It is frequently added to food-grade plastics and medical tubing to prevent the materials from becoming brittle or discolored when exposed to heat. This cross-industry utility highlights its extreme stability and safety profile, as it must meet rigorous migration standards for food-contact materials before being approved for such uses.
Routine Integration:
- Synergies: Pairs exceptionally well with other antioxidants like Tocopherol and Sodium Ascorbyl Phosphate to create a multi-level defense system for both the product and the skin.
- Conflicts: There are no known cosmetic ingredient conflicts; it is chemically inert regarding the biological activity of other skincare actives.
Clinical Consensus & Safety:
The Cosmetic Ingredient Review (CIR) Expert Panel first assessed this ingredient in 2014, concluding it is safe in the practices of use and concentration (typically 0.01% to 0.5%) described in safety assessments. Clinical data indicates it is neither a skin irritant nor a sensitizer. Because it does not penetrate the skin barrier significantly, dermatological concerns regarding systemic toxicity or endocrine disruption are non-existent. It is an excellent alternative for formulators looking to replace older, more controversial stabilizers.
Is this ingredient a “clean” alternative to BHT?
Many formulators view it as a superior alternative to Bht because its large molecular weight prevents skin penetration, addressing many of the safety concerns associated with smaller phenolic antioxidants.
Will this ingredient help clear my acne?
No, this ingredient does not have bioactive properties for treating acne. Its role is strictly functional, ensuring the other ingredients in your serum or moisturizer remain effective and do not degrade into irritating byproducts.
Does it provide sun protection?
While it is often found in sunscreens, it is not a UV filter. It protects the sunscreen formula itself from being degraded by the sun, rather than protecting the skin from UV rays directly.