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    Chemical name : 2- (2'-Hydroxy-5'-tert-octylphenyl)benzotriazole
    Introduction: UV-329 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers.  It  is an effective light stabilizer for a variety of plastics and other organic substrates.

    Molecular formula: C20H25N3O
    CAS NO : 3147-75-9
    Structure :


    Appearance : white powder

    Melting Range : 103-105 °C

    Transmittance (%) : 440nm≥97  500nm≥98

    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
    Packing:UV-329 is available in powder form in a 20 kg (44.1 LB) fiber drum, net weight, with an inner PE liner.

    -Optical Brighteners
    -UV Absorbers
    -Photo Initiators
    - Fuel Oil Additives
    -Polymerization Inhibitors
    -Organometallic Chemicals
        Heat transfer fluid
    -M/DBT Dielectric Oil
    -PEPE Dielectric Oil
    -Diphenyl ether
    -p-Toluic acid
    -Cyclohezane Carboxylic Acid
    -m-Toluic acid
    -o-Toluic acid
    -p-Toluoyl Chloride
    -Benzaldehyde-2-sulfonic acid sodium
    -4-Formyl Benzoic Acid
    -4-Benzyloxycinnamic acid
    -1,4-Naphthalene dicarboxylic acid
    -p-Aminobenzamide Glutamic Acid
    -3,4-Dihydroxybenzoic acid
    -4,4'-Dihydroxy benzophenone
    -4-Fluorocinnamic acid
    -Sulfobutyl Ether-β-cyclodextrin
    -2-Iodobenzoic acid
    -2,4-Dihydroxy benzophenone
    -2,5-Dihydroxy toluene
    -Nitrogen trifluoride
    -2-Bromophenyl Methyl Sulfide
    -2-Bromophenyl Methyl Sulfone
    -2-Bromophenyl methyl sulfoxide
    -2-Chloro-5-nitro benzoic acid
    -5-chloro-2-methyl aniline
    -4,4'-Bis(methoxymethyl)- 1,1'-Biphenyl
    -Biphenyl-4,4'-dicarboxylic Acid
    -5'-Cytidylate Monophosphate
    -4-Biphenyl acetic Acid
    -4-Hydroxy-(1,1'-biphenyl)-4'-carboxylic acid
    -2-Cyano-4'-methyl biphenyl
    -4-Phenylbenzoic acid
    -4-Bromophenyl methyl sulfone
    -4-Bromophenyl methyl sulfoxide
    -4-Chloro benzophenone
    -4-Hydroxy benzophenone
    -4-Hydroxycinnamic acid
    -4-(methylamino)benzoic acid
    -4,4'-Stilbene dicarboxylic acid
    -2- Methylnaphthalene
    -2-Cyanobenzyl chloride
    -Trifluoromethanesulfonic anhydride
    -Trifluoromethanesulfonic acid
    -O-Methyl benzoquinone
        UV Absorbers
    -LS 292
    -LS 622
    -LS 770
    -LS 783
    -LS 791
    -LS 944

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