UV Absorber UV-320

Chemical Name: 2-(2H-benzotriazol-2-yl)-4,6-di-tert-butylphenol CAS NO.:3846-71-7 Molecular Formula：C20H25N3O Molecular Weight：323.4 Specification Appearance:light yellow powder Content: ≥ 99% Melting point: 152-154°C Loss on drying: ≤ 0.5% Ash: ≤ 0.1% Light transmittance: 440nm≥97%, 500nm≥98 Toxicity: low toxicity,rattus norvegicus oral LD 50 >2g/Kg weight. General dosage: 1. Unsaturated Polyester : 0.2-0.5wt% based on polymer weight 2. PVC: Rigid PVC : 0.2-0.5wt% based on polymer weight Plasticized PVC : 0.1-0.3wt% based on polymer weight 3. Polyurethane : 0.2-1.0wt% based on polymer weight 4. Polyamide : 0.2-0.5wt% based on polymer weight Package and Storage 1. 25kg carton 2. Stored in sealed, dry and dark conditions