Nanjing Benjie Chemical Plant Co.Ltd

Nanjing Benjie Chemical Plant Co.Ltd

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2-(2-Hydroxy-5-tert-octylphenyl) benzotriazole

Ultraviolet Absorbent UV 329

Name: Ultraviolet absorbent UV-329
Chemical name: 2-(2-Hydroxy-5-tert-octylphenyl) benzotriazole

Synonyms:Tinuvin 329,2-benzotriazol-2-yl-4-(1,1,3,3-tetramethylbutyl)phenol,UV absorber-329
Molecular formula: C20H25N3O
CAS No.: 3147-75-9
Structural formula:

Specifications:Ultraviolet Absorbent UV-329


White powder



Melting point




Light transmittance

440nm>97% 500nm>98%

Features and uses:
Ultraviolet absorbent UV 329 is one kinds of high efficient anti-aging auxiliary with good performance, Tinuvin 329 can adsorb the UV ray of 270-340 nanometer ,UV 329 can be used in PE, PVC, PP, PS, PC, polypropylene fiber, ABS resin, epoxy resin, resin fiber, vinyl acetate or used in the packing material. Dosage : thin product 0.1-0.5%, thick product 0.05-0.2%. 

Packing and storage:

2-(2-Hydroxy-5-tert-octylphenyl) benzotriazole is non-toxic, non-inflammable, non-explosive, non-corrosive matter with good storage stability. Packed in plastic bag lined carton, Net wt. 25kg & 50kg, or following your demand.