Chemical Name: 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole
Synonyms:2-(2H-Benzo[d][1,2,3]triazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol
Molecular Formula  C20H25N3O    
Molecular Weight   323   
Structure


CAS Number   3147-75-9

Specification
Appearance: White to slightly yellowish crystalline powder or granule
Melting point: 103-107°C
Clarity of solution (10g/100ml Toluene): Clear
Color of solution (10g/100ml Toluene): 440nm ≥96.0%
(Transmission) 500nm ≥98.0%
Loss on drying: ≤0.3%
Assay (by HPLC):≥99.0%
Ash: ≤0.1%

Applications:
UV- 329 is a unique photo stabilizer that is effective in a variety of polymeric systems: particularly in polyesters, polyvinyl chlorides, styrenics, acrylics, polycarbonates, and polyvinyl butyal. UV- 329 is especially noted for its broad range UV absorption, low color, low volatility, and excellent solubility. Typical end-uses include molding, sheet, and glazing materials for window lighting, sign, marine and auto applications. Specialty applications for UV- 5411 include coatings (particularly themosets where low volatility is a concern), photo products, sealants, and elastomeric materials.

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

Other products of the UV Absorber Series, for example:
BP-1 (UV-0)
BP-2
BP-3(UV9)
BP-4
BP-5
BP-6
BP-9
BP-12(UV-531)
BP-P
UV-120
UV-234
UV-320
UV-326
UV-327
UV-328
(UV-5411)
UV-360
UV-571
UV-1084
UV-1164
UV-1577
UV-2908
UV-3030
UV-3039
UV-3638
UV-4050H
UV-5050H
UV-1
UV-2