Avobenzone

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Avobenzone (chemical name: Butyl Methoxydibenzoylmethane) is an oil-soluble organic compound widely used as a UVA filter in sunscreen formulations. It is valued for its ability to absorb a broad spectrum of ultraviolet A (UVA) rays (320–400 nm), protecting the skin from premature aging and damage caused by sun exposure. Avobenzone is often combined with other UV filters to provide broad-spectrum sun protection. It is a pale yellow liquid or crystalline powder, soluble in oils and alcohols but unstable in sunlight unless stabilized with other agents.

Description

Avobenzone

Primary Uses 

Cosmetics & Personal Care

  • Used extensively as a UVA filter in sunscreen lotions, creams, and sprays to protect skin from harmful UVA radiation. 
  • Incorporated in daily-use moisturizers and lip balms with SPF for sun protection. 
  • Employed in anti-aging skincare products to prevent photoaging caused by UVA rays. 

Pharmaceuticals

  • Used in topical formulations for photoprotection during dermatological treatments and procedures. 

Research & Development

  • Utilized in formulation development for sunscreens and UV-protective products. 
  • Studied for photostability enhancement when combined with stabilizers or other UV absorbers. 

Secondary Uses 

Textiles & Coatings

  • Occasionally used in UV-protective coatings for textiles and plastics to enhance durability against sun damage. 

Packaging

Incorporated into some UV-protective packaging materials to extend shelf life of sensitive products.

PRODUCT KEY FEATURES

1. Basic Identification Attributes

  • Chemical Name (IUPAC): Butyl 4-(diethylamino)-2-hydroxybenzoyl-phenylmethane (Avobenzone) 
  • Common/Trade Name: Avobenzone, Parsol 1789 
  • CAS Number: 70356-09-1 
  • HS Code: 2934.99.90 
  • Molecular Formula: C₂₀H₂₂O₃ 
  • Synonyms: 
    • Butyl Methoxydibenzoylmethane 
    • 1-(4-methoxyphenyl)-3-(4-tert-butylphenyl)propane-1,3-dione 

 

2. Physical & Chemical Properties

  • Physical State: Pale yellow crystalline powder or viscous liquid 
  • Color & Odor: Pale yellow, mild odor 
  • Melting Point: 80–85 °C 
  • Density: Approx. 1.03 g/cm³ 
  • Solubility: Soluble in oils, alcohols, and organic solvents; insoluble in water 
  • Vapor Pressure: Low 
  • Flash Point: > 180 °C (closed cup) 
  • Stability: Photounstable alone; requires stabilizers in formulations 

 

3. Safety & Hazard Attributes

  • Hazard Class (GHS): Generally considered safe for topical use; may cause mild skin irritation in sensitive individuals 
  • NFPA Ratings: Health 1, Flammability 1, Reactivity 0 
  • Exposure Limits: No specific occupational exposure limits established 
  • Reactivity: Stable under normal conditions; degrades under UV light unless stabilized 

 

4. Storage & Handling Attributes

  • Storage Conditions: Store in a cool, dry place away from direct sunlight 
  • Container Type: Airtight containers made of glass or high-quality plastic to avoid contamination 
  • Shelf Life: Approximately 2 years when stored properly 
  • Special Handling: Avoid prolonged exposure to light and heat; use antioxidants or stabilizers in formulations 

 

5. Regulatory & Compliance Attributes

  • FDA (USA): Approved as a sunscreen active ingredient (maximum allowed concentration: 3%) 
  • EMA (EU): Approved and regulated as a UV filter in cosmetic products 
  • JECFA: Listed and recognized as safe within specified concentrations 
  • Hazard Symbols (GHS): None 
  • Transportation Restrictions: Not classified as hazardous 
  • Waste Disposal: Dispose of in accordance with local environmental regulations 

 

6. Environmental & Health Impact

  • Ecotoxicity: Low to moderate aquatic toxicity; care needed to avoid environmental contamination 
  • Persistence: May degrade under sunlight exposure; biodegradable under environmental conditions 
  • Carcinogenicity/Mutagenicity: Not classified as carcinogenic or mutagenic 

Biodegradability: Readily biodegradable in aquatic environments

SAFETY HANDLING PRECAUTIONS
  • Safety Handling Precautions

  • PPE: Use gloves and safety goggles when handling pure substance to avoid skin and eye irritation. 
  • Handling: Work in well-ventilated areas; avoid inhalation of dust or aerosols. 
  • Storage: Keep away from heat and light; seal containers tightly after use. 
  • Hygiene: Wash hands after handling; avoid ingestion and contact with eyes. 
  • Spill Response: Use inert absorbents and dispose of according to regulations. 

 

First Aid Measures

  • Inhalation: Move affected person to fresh air; seek medical advice if irritation persists. 
  • Skin Contact: Wash skin with soap and water; consult a physician if irritation or allergic reaction occurs. 
  • Eye Contact: Rinse eyes thoroughly with water for 15 minutes; seek medical attention if irritation continues. 
  • Ingestion: Rinse mouth with water; seek medical attention if significant amount swallowed. 

 

Firefighting Measures

  • Fire Hazards: Combustible; may produce toxic fumes when heated to decomposition. 
  • Extinguishing Media: Use water spray, foam, dry chemical, or carbon dioxide extinguishers. 

Special Precautions: Firefighters should wear protective clothing and breathing apparatus.