2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol
CAS 70321-86-7
EC 274-570-6
Formula C30H29N3O
MW 447.57 g/mol
UV Absorbers & Stabilizers Plastics & PolymersPrinting & PackagingAerospace & DefenseAutomotiveCoatings, Adhesives, Sealants & Elastomers Antioxidant & StabilizerUV Protection & StabilizationCross-linking & Curing
Description
2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, commercially known as Tinuvin 234 or UV-234 (CAS 70321-86-7, EC 274-570-6), is a benzotriazole-class UV absorber with the molecular formula C30H29N3O. It carries no assigned E-code and is registered under REACH.
In polymer processing, UV-234 absorbs UV radiation in the 300-400 nm range and dissipates it as heat, protecting polycarbonate, PET, and engineering plastics from photodegradation and yellowing. In automotive and industrial coatings, it is combined with HALS stabilizers to extend film durability under prolonged outdoor exposure.
UV-234 is supplied as a powder and is available in standard industrial grades compliant with REACH registration requirements. It is classified under HS code 29339900. Packaging formats typically include 25 kg bags or fiber drums; specific lot documentation and safety data sheets are available upon request.
In polymer processing, UV-234 absorbs UV radiation in the 300-400 nm range and dissipates it as heat, protecting polycarbonate, PET, and engineering plastics from photodegradation and yellowing. In automotive and industrial coatings, it is combined with HALS stabilizers to extend film durability under prolonged outdoor exposure.
UV-234 is supplied as a powder and is available in standard industrial grades compliant with REACH registration requirements. It is classified under HS code 29339900. Packaging formats typically include 25 kg bags or fiber drums; specific lot documentation and safety data sheets are available upon request.
Physical Properties
| Melting Point | 139-143 °C(lit.) |
| Boiling Point | 589.3±60.0 °C(Predicted) |
| Density | 1.12±0.1 g/cm3(Predicted) |
| Flash Point | 383 °F(lit.) |
| Color | White to Off-White |
| Odor | fresh fruity raspberry rose |
| Form | powder |
| Water Solubility | insoluble, <0.04 ppm at 20 ºC |
Safety & Handling (Learn More)
Warning GHS07
H
H315H319H335H412H413
P
P261P264P271P273P280P319P321P405P501P264+P265P302+P352P304+P340P332+P317P337+P317P362+P364P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29339900 |
| Storage Class | 11 - Combustible Solids |
Other Names
2-(benzotriazol-2-yl)-4,6-bis(2-phenylpropan-2-yl)phenolUV-234Tinuvin 234TINUVIN 900UV Absorber 234Benzotriazole BTUltraviolet absorbent UV-2342-(2H-BENZOTRIAZOL-2-YL)-4,6-BIS(1-METHY
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