3,5-Bis-tert-butylsalicylic acid

3,5-Bis-tert-butylsalicylic acid
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UV-613

CAS 19715-19-6
  • Product Category UV Absorbers & Light Stabilizers
  • Molecular Formula C₁₅H₂₂O₃
  • Appearance White to off-white crystalline powder
  • Molecular Weight 250.33
  • Melting Point 160-163 °C
Chemical Properties
  • Stability: Maintains stable chemical properties under standard storage and handling conditions
  • Chemical characteristics: Exhibits weak acidity (pKa≈3.34) and phenolic antioxidant properties
  • Combustibility: Combustible; may decompose at high temperatures to produce carbon monoxide and other carbon oxides
  • Incompatible materials: Strong oxidizing agents and strong alkalis
  • Application: Offers UV absorption capability and can be used in light stabilization systems and chemical synthesis
Key Applications
  • Polymer Additives: Used as an antioxidant, light stabilizer, and weathering additive in polyolefins, PVC, ABS, and rubber products.
  • Coatings & Inks: Help provide yellowing resistance, antioxidant protection, and UV shielding in outdoor coatings, wood coatings, and printing inks.
  • Dyes & Pigments: Serves as an intermediate for synthesizing azo dyes, acid dyes, and fluorescent dyes.
  • Cosmetics & Sunscreens: Used as a UV absorber in sunscreen products and an antioxidant in skincare formulations
  • Pressure-Sensitive Recording Paper: Used as a color developer and stabilizer to improve the light and heat resistance of paper products
  • Pharmaceuticals & Fragrances: Utilized as an antioxidant and preservative intermediate
Emergency Handling
  • Skin Contact: Remove contaminated clothing immediately. Wash skin thoroughly with plenty of water and soap for at least 15 minutes. Seek medical attention if irritation persists.
  • Eye Contact: Rinse immediately with plenty of water for at least 15 minutes while holding the eyelids open. Seek medical attention promptly.
  • Inhalation: Move the affected person to fresh air and keep the airway clear. Administer oxygen if breathing is difficult. If breathing stops, provide artificial respiration and seek medical help immediately.
  • Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical attention immediately.
  • Fire: Use dry chemical powder or carbon dioxide for extinguishing. Do not use a direct water jet, as it may cause splashing.
Packaging & Storage
  • Packaging: Sealed packaging with an inner plastic bag (20 kg per package).
  • Storage Conditions: Store at room temperature in a cool, dry, and well-ventilated warehouse. Keep away from heat sources and open flames.
  • Storage Requirements
    1. Store separately from strong oxidizing agents, strong alkalis, and food products.
    2. Keep containers tightly closed to protect the product from moisture and light.
    3. Stack packages at least 10 cm above the ground and keep them away from heating systems and pipelines.
Handling Precautions
  • Ventilation & Dust Control: Handle in a fume hood or with adequate exhaust ventilation to prevent dust generation and inhalation.
  • Fire Prevention: Keep open flames, sparks, and smoking away from the production area. Use explosion-proof electrical equipment where required.
  • Incompatible Materials: Do not store or mix with strong oxidizing agents or strong alkalis.
  • Spill & Waste Disposal: Collect small spills with dry sand or inert absorbent materials. Dispose of waste through a licensed hazardous waste contractor. Do not discharge directly into the environment.
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