• ✅ Guaranteed ultra-high purity: ≥99.0% minimum assay (actual 99.87%), ensures consistent UV protection performance
• ✅ Precise melting point: 47.0-49.0℃ (actual 47.2-48.0℃), easy to disperse in polymer matrices
• ✅ Extremely low loss on drying: ≤0.5% maximum (actual 0.14%), prevents formulation issues
• ✅ Ultra-low ash content: ≤0.1% maximum (actual 0.04%), minimizes residue in finished products
• ✅ Excellent optical properties: ≥90.0% transmittance at 450nm (actual 95.4%), ≥95.0% at 500nm (actual 98.6%)
• ✅ Broad UV absorption range: Effectively absorbs UV radiation of 240-340 nm wavelength
• ✅ Wide polymer compatibility: Compatible with PE, PVC, PP, PS, PC, organic glass, polypropylene fiber and EVA
• ✅ Superior light stability: Excellent light-stability effect on drying phenol aldehyde, alcohol varnish, acname, polyurethane and acrylate
• ✅ Low volatility: Resists migration and evaporation during high-temperature processing
• ✅ Strict quality control: Batch-to-batch consistency guaranteed, suitable for large-scale industrial production

Benzophenone-12, commonly known as UV-531 or Octabenzone, is a high-performance benzophenone-type UV absorber and light stabilizer with CAS number 1843-05-6. Its chemical name is 2-hydroxy-4-n-octoxy benzophenone, molecular formula is C21H26O3, with a molecular weight of 326.43 g/mol. Our industrial grade product appears as a pale yellow crystalline powder, with strict control over purity, melting point, moisture and optical properties.

As an effective light stabilizer, Octabenzone absorbs the UV radiation of 240-340 nm wavelength, protecting polymers and coatings from UV-induced degradation, chalking, fading and brittleness. It is widely applied to PE, PVC, PP, PS, PC organic glass, polypropylene fiber, ethylene-vinyl acetate, etc. Moreover, it has a very good light-stability effect on drying phenol aldehyde, varnish of alcohol and acname, polyurethane, acrylate, etc.

Our UV-531 is produced with advanced synthesis and purification technology, with full batch traceability and complete supporting quality documents. We can provide customized specifications to meet specific customer requirements and ensure long-term stable bulk supply for global industrial manufacturers.

Appearance: Pale yellow crystalline powder

Packaging: 25kg fiber drum with inner PE liner; Customized packaging available upon request

Storage Conditions: Store in tightly sealed containers in a cool, dry and well-ventilated warehouse at 5-30℃; Keep away from heat sources, direct sunlight and strong oxidizing agents; Avoid moisture; 24-month shelf life under proper storage conditions

Transport Classification: Common chemical

• UV-531
• Octabenzone
• Benzophenone-12
• 2-hydroxy-4-n-octoxy benzophenone
• 2-Hydroxy-4-(octyloxy)benzophenone
• CAS 1843-05-6
• UV Absorber UV-531
• Light Stabilizer Benzophenone-12
• Industrial Grade Octabenzone

1. Plastic Industry (Core Application): Used as UV stabilizer for various thermoplastics including polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC) and ABS. Protects plastic products from UV degradation and extends their service life.
2. Coating & Paint Industry: Applied as UV absorber in alkyd varnishes, acrylic coatings, polyurethane coatings, epoxy coatings and industrial paints. Improves coating durability and prevents color fading and chalking.
3. Fiber Industry: Used as UV stabilizer for polypropylene fibers, polyester fibers and other synthetic fibers. Protects fibers from UV-induced degradation and improves their weather resistance.
4. Organic Glass Industry: Applied as UV absorber for polycarbonate organic glass and acrylic sheets. Prevents yellowing and maintains optical clarity.
5. EVA Copolymer Industry: Used as UV stabilizer for ethylene-vinyl acetate (EVA) copolymers used in solar cell encapsulants, footwear and packaging materials.
6. Other Industrial Fields: Employed in rubber products, adhesives, sealants and printing inks to improve UV resistance and weather stability.