Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate
Hindered phenolic antioxidant. Protects the formula itself from oxidative degradation – not an active ingredient but a formula adjuvant. Especially useful in sunscreens with avobenzone and products with plant oils. Does not act directly on the skin or penetrate the epidermis.
Supporting ingredient
It gives a product its texture, stability or shelf life. It has no claimed effect on the skin, so an efficacy tier does not apply. What is known about its safety is below
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate (Tinogard TT, Irganox 1010) is a hindered phenolic antioxidant – one of the most effective industrial stabilisers against oxidative degradation. A technical ingredient: it does not act on skin, it protects the formula. Where applied. Sunscreens with avobenzone (stabilises the filter against UV-induced breakdown), formulas with plant oils, products containing vitamin C, retinol, tocopherol. Concentration 0.05-0.5%. Seen in Avène, La Roche-Posay Anthelios, ISDIN Fotoprotector. Evidence base. Yener (J Photochem Photobiol B, 2005) and Bonda (Cosmetics & Toiletries, 2007) showed that adding Tinogard TT to avobenzone sunscreens extends UVA filter photostability by 30-50%. This is a technical effect on the formula, not on skin. Safety. CIR confirmed safety at cosmetic concentrations (up to 1%). The molecule is too large to penetrate intact epidermis. No systemic absorption. Does not cause contact allergies. Pregnancy and lactation – safe. Has no biological activity on human skin. No restrictions in pregnancy or lactation formulas.
Frequently asked questions
Is Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate safe during pregnancy?
Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate for?
Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate suits: normal, dry, combination, oily, sensitive.
What is Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate and what does it do in cosmetics?
Hindered phenolic antioxidant.
What's the INCI name for Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate?
The INCI name is Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate. It may also appear as: Tinogard TT, Irganox 1010.
See Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate in a product composition right on the store page
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Similar role in the formula
Published: · updated: