UV Absorber 234

UV Absorber 234 Basic information
Characterization Physical Properties Applications Features/benefits Guidelines for use Handling & Safety
Product Name:UV Absorber 234
Synonyms:BLS234;2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol UV-234;2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol powder;2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol;2-(3',5'-BIS(1-METHYL-1-PHENYLETHYL)-2'-HYDROXYPHENYL)BENZOTRIAZOLE;2-[2'-hydroxy-3',5'-bis(-dimethyl benzyl)-phenyl-benzotriazole;2-[2'-Hydroxy-3',5'-Bis(A,A-Dimethyl Benzyl)-Phenyl]Benzotriazole;2-(2H-BENZOTRIAZOL-2-YL)-4,6-BIS(1-METHY
CAS:70321-86-7
MF:C30H29N3O
MW:447.57
EINECS:274-570-6
Product Categories:Polymer Additives;Polymer Science;Polymer Additives;Polymer Science;Stabilizers
Mol File:70321-86-7.mol
UV Absorber 234 Structure
UV Absorber 234 Chemical Properties
Melting point 139-143 °C(lit.)
Boiling point 589.3±60.0 °C(Predicted)
density 1.12±0.1 g/cm3(Predicted)
Fp 383 °F(lit.)
storage temp. Refrigerator
solubility H2O: <0.04 ppm at 20 °C, insoluble
pka9?+-.0.10(Predicted)
form powder
color White to Off-White
Odorfresh fruity raspberry rose
Water Solubility insoluble, <0.04 ppm at 20 ºC
InChIKeyOLFNXLXEGXRUOI-UHFFFAOYSA-N
CAS DataBase Reference70321-86-7(CAS DataBase Reference)
EPA Substance Registry SystemPhenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)- (70321-86-7)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany -
HS Code 29339900
MSDS Information
ProviderLanguage
SigmaAldrich English
UV Absorber 234 Usage And Synthesis
CharacterizationUV Absorber 234 is a high molecular weight ultraviolet light absorber (UVA) of the hydroxyphenyl benzotriazole class, imparting excellent light stability to a variety of polymers.
Physical PropertiesPhysical Properties
ApplicationsUV Absorber 234 is highly effective for polymers processed at high temperatures such as polycarbonates, polyalkylene terephthalates, polyacetals, polyamides, polyphenylene sulfide, polyphenylene oxide, aromatic copolymers, thermoplastic polyurethane and polyurethane fibers, as well as for polyvinylchloride, styrene homo- and copolymers. Applications include molded articles, films, sheets and fibers.
Features/benefitsUV Absorber 234 features low volatility, exceptional light absorbing characteristics and good compatibility in various substrates. This makes the product particularly suitable for applications characterized by high surface area, such as films and fibers.
Guidelines for useUse levels of UV Absorber 234 range between 0.15 and 0.60 %, depending on substrate and performance requirements of the final application. UV Absorber 234can be used alone or in combination with other functional additives such as antioxidants (hindered phenols, phosphites) and HALS light stabilizers, where often a synergistic performance is observed. Extensive performance data of UV Absorber 234 alone or in combination with other additives are available in many of the substrates listed above.
Handling & SafetyUV Absorber 234 exhibits a very low order of oral toxicity and does not present any abnormal problems in its handling or general use. Detailed information on handling and any precautions to be observed in the use of the product(s) described in this leaflet can be found in our relevant health and safety information sheet.
UsesBenzotriazole BT is a low volatile benzotriazole UV light absorber and stabilizer.
UsesLow volatile benzotriazole UV light absorber and stabilizer.
Imparts outstanding light stability for polymers processed at high temperatures such as polycarbonate, polyesters, polyacetal, polyamides, polyphenylene sulfide, polyphenylene oxide, aromatic copolymers, thermoplastic polyurethane and polyurethane fibers also highly effective for polyvinylchloride, styrene homo- and copolymers.
Flammability and ExplosibilityNotclassified
UV Absorber 234 Preparation Products And Raw materials
4-Dodecyloxy-2-hydroxybenzophenone 1-(PHENOXYMETHYL)-1H-BENZOTRIAZOLE UV Absorber 326 Ethyl 4-[[(methylphenylamino)methylene]amino]benzoate 2-(2H-Benzothiazol-2-yl)-6-(dodecyl)-4-methylphenol 3-METHOXYPHENYLBENZOATE 2,4-Di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate Methyl Ultraviolet absorbent 2-METHYL-2H-BENZOTRIAZOLE Phenol, 2-amino-6-(1-methylethyl)- (9CI) Phenylacetone Benazol P Kresoxim-methyl 6-AMINO-2,4-XYLENOL (1-phenylethyl)phenol UV Absorber 234 (1-methyl-1-phenylethyl)phenol

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