UV ABSORBER UV 329 CAS NO.3147-75-9

Chemical name:2- (2'-Hydroxy-5'-tert-octylphenyl)benzotriazole

CAS No.：3147-75-9

Molecular formular：C₂₀H₂₅N₃O

Molecular weight：323

Appearance: White powder

Melting point，℃：103-105

Assay (HPLC), %:≥99

Ash, %:≤0.1

Loss on drying, %:≤0.3

Transmittance450nm≥98%

500nm≥99%

UV ABSORBER HOSORB-329is excellent benzotriazole ultraviolet absorbentwith effective absorption of ultraviolet radiation in 270-380 nm region.It issuitable for polyester, rigid PVC, PS, PMMA, PC, ABS resin etc. It is particularly suitable for the protection of polycarbonates. In transparent products and high temperature processing of engineering plastics, its effect isexcellent. It can also be used for polyolefin. info at hhochem. com