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

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.