Octocrylene UV Filter CAS 6197-30-4

Octocrylene – Broad-Spectrum UV Filter for Sunscreen and Cosmetic Formulations

Basic Information

• CAS Number: 6197-30-4

• Molecular Formula: C₂₄H₂₇NO₂

• Molecular Weight: 361.48 g/mol

• Synonyms: 2-Ethylhexyl 2-cyano-3,3-diphenylacrylate, Octocrylene

• Appearance: Clear to light yellow viscous liquid

• Density: ~1.05 g/cm³ at 20°C

• Boiling Point: 215–220°C (at reduced pressure)

• Flash Point: 113–116°C

• Solubility: Insoluble in water; miscible with oils and organic solvents

• Storage: Store in tightly sealed containers, protected from light, in a cool place

Overview
Octocrylene is an organic UV filter belonging to the cinnamate ester class. It efficiently absorbs UVB and short UVA radiation, providing broad-spectrum protection. Its unique chemical structure, featuring diphenyl groups, ensures effective photostability and resistance to photodegradation. Octocrylene is widely used in sunscreens, day creams, and cosmetic products to enhance UV protection and improve water resistance. Its lipophilic nature allows easy incorporation into oil phases and compatibility with other lipophilic ingredients.

Mechanism of Action
Octocrylene absorbs UV radiation in the 290–320 nm (UVB) and 320–360 nm (UVA) range through its conjugated system. Upon absorption, the energy is dissipated as heat, preventing UV-induced damage to skin. Additionally, octocrylene stabilizes other UV filters, such as avobenzone, by reducing their photodegradation, thereby extending the overall protection of the formulation.

Applications

• Sunscreens: Used as a primary UV absorber in sunscreens, day moisturizers, and after-sun products.

• Waterproof formulations: Helps form a film on the skin, reducing wash-off and improving water resistance.

• Stabilizer: Protects more photolabile UV filters (e.g., avobenzone) from degradation.

• Cosmetics: Incorporated into lip balms, foundations, and tinted moisturizers for added UV protection.

• Industrial: Occasionally used in coatings and plastics for UV stabilization.

Key Benefits

• Effective UVB and short UVA absorption.

• High photostability – resistant to sunlight degradation.

• Enhances water resistance of sunscreen products.

• Compatible with other lipophilic and oil-soluble ingredients.

• Provides a smooth, non-greasy feel when formulated correctly.

• Approved for use in sunscreens at concentrations up to 10% (varies by region).

Safety and Handling

• Generally regarded as safe at recommended concentrations (≤10%).

• May cause mild skin irritation in sensitive individuals at high concentrations.

• Not recommended for use in children's products without proper testing.

• Store in a cool, dry place, away from direct sunlight and heat.

• Use appropriate personal protective equipment (gloves, safety goggles) when handling.

• Shelf life: typically 24 months under recommended storage conditions.

Quality Assurance
Each batch is tested for purity (by HPLC), color, and UV absorption characteristics to ensure consistent performance.