Benzotriazolyl Dodecyl P-Cresol is a broad-spectrum ultraviolet (UV) light absorber primarily utilized as a photostabilizer to prevent product degradation. By absorbing harmful radiation, it protects sensitive ingredients, colors, and fragrances from fading or losing efficacy when exposed to light.
- INCI Name:
- Benzotriazolyl Dodecyl p-Cresol
- Chemical/Scientific Name:
- 2-(2H-benzotriazol-2-yl)-6-dodecyl-4-methylphenol
- Common Aliases:
- Tinogard AS, Phenol, 2-(2H-benzotriazol-2-yl)-6-dodecyl-4-methyl-
| Category: | Stabilizers |
| Source Origin: | Synthetic |
| Comedogenic Rating: | N/A |
| Primary Industries: | Cosmetics, Personal Care, Fine Fragrance |
| Solubility: | Oil-soluble |
At a Glance: Properties & Effects
| Formula Stability | |
| Texture Enhancement | |
| Irritation Risk |
Primary Benefits:
- Extends shelf life of light-sensitive formulations.
- Prevents the discoloration of clear or transparent packaging products.
- Protects fragile active ingredients like Ascorbic Acid and Retinol from photolysis.
- Stabilizes complex Fragrance profiles against UV-induced chemical shifts.
Potential Risks:
- Minimal risk of contact dermatitis in hypersensitive individuals.
- Not intended for use as a primary skin-protecting sunscreen agent.
Biological Action & Cosmetic Profile
Maintaining the aesthetic and chemical integrity of a topical formulation requires protecting its components from environmental stress. Benzotriazolyl Dodecyl P-Cresol functions as a “light filter” for the product itself rather than a biological active for the skin. It belongs to the benzotriazole class, characterized by a chemical structure capable of absorbing energy from UV radiation (specifically UVA and UVB) and dissipating it as harmless heat. This process prevents the radiation from breaking chemical bonds within the formula, a phenomenon known as photodegradation.Operating through a mechanism of rapid internal conversion, this molecule ensures that energy from light does not initiate free radical chain reactions within the container. When incorporated into emulsions or anhydrous balms, it safeguards light-sensitive lipids and synthetic dyes. Its oil-soluble nature allows it to integrate seamlessly into the lipid phase of skincare products, providing a robust shield that maintains the product’s color and scent from the first use until the expiration date.
Broader Applications & Origins
While widely used in high-end skincare, this stabilizer is also critical in the perfumery industry. High concentrations of essential oils and synthetic Aroma chemicals are notoriously prone to oxidation and structural changes when exposed to sunlight. Benzotriazolyl Dodecyl P-Cresol prevents these perfumes from turning “sour” or changing color over time. It is also frequently found in hair care products, where it serves a dual purpose: protecting the formula in the bottle and providing a secondary layer of protection for hair fibers against UV-induced protein damage.
Routine Integration
Synergies:
- Avobenzone: Enhances the photostability of this UVA filter, preventing it from breaking down quickly upon sun exposure.
- Antioxidants: Works alongside Tocopherol to provide a comprehensive defense against oxidative and light-driven spoilage.
- Transparent Packaging: Essential for products housed in clear glass or plastic to maintain visual appeal.
Conflicts:
- No known chemical conflicts; universally compatible with most cosmetic raw materials.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated the safety of benzotriazole derivatives and concluded they are safe for use in cosmetic formulations at current practice concentrations. Because this ingredient is generally used at low levels (typically under 1%), systemic absorption is negligible. Toxicological data indicates it is non-sensitizing and non-irritating to the skin and eyes. While it absorbs UV light, it is not listed on Annex VI of the EU Cosmetic Regulation as a primary UV filter for sun protection, meaning it should only be classified as a stabilizer or light absorber for product protection.
Is Benzotriazolyl Dodecyl P-Cresol a sunscreen?
Technically, it is a UV absorber, but it is not used to protect the skin from sunburn. Instead, it is used to protect the product’s ingredients from being destroyed by light.
Why is this ingredient in my clear serum?
Clear serums are highly vulnerable to light. This ingredient prevents the serum from turning yellow or cloudy and ensures the active ingredients stay potent.
Is it safe for sensitive skin?
Yes, dermatological assessments show it has a very low potential for irritation and is considered safe for all skin types in standard cosmetic concentrations.