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

UV ABSORBER HOSORB-329 is excellent benzotriazole ultraviolet absorbent with effective absorption of ultraviolet radiation in 270-380 nm region.

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

Transmittance   450nm≥98%     

500nm≥99%

UV ABSORBER HOSORB-329 is excellent benzotriazole ultraviolet absorbent with effective absorption of ultraviolet radiation in 270-380 nm region. It is suitable 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 is excellent. It can also be used for polyolefin.