UV Absorber UV-328

Chemical Name: 2-(2'-Hydroxy-3',5'-dipentylphenyl)benzotriazole CAS NO.:25973-55-1 Molecular Formula：C22H29N3O Molecular Weight：351.48516 Specification Appearance: white to light yellow powder Content: ≥ 99% Melting point: 80-83°C Loss on drying: ≤ 0.5% Ash: ≤ 0.1% Light transmittance :440nm≥96%, 500nm≥97% Application This product is mainly used in polyvinyl chloride, polyurethane, polyester resin and others. Max absorption wave length range is 345nm. Toxicity: low toxicity and used in food packing materials. Usage 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