Tinuvin 328 (UV Absorber) CAS#25973-55-1
High-Efficiency UV Absorption Performance: THUV-328 effectively absorbs ultraviolet light in the 270–340 nm wavelength range, with a maximum UV absorption peak at 345 nm, providing excellent UV protection.
Excellent Photostability and Durability: It offers outstanding photostable performance similar to UV-326 and UV-327, helping maintain material stability and extend product service life under UV exposure.
Superior Polymer Compatibility: THUV-328 demonstrates excellent compatibility with various resins, including polyethylene, polypropylene, polystyrene, PVC, polyester, epoxy resin, ABS resin, and cellulose resin.
Low Toxicity and Broad Application Range: With low toxicity, low thermal volatility, and good wash resistance, THUV-328 is suitable for food-contact plastic packaging materials, children's plastics, coatings, and other polymer applications.
Products Description of Tinuvin 328 (UV Absorber) CAS#25973-55-1
THUV-328 is a highly effective UV absorber capable of absorbing ultraviolet light within the wavelength range of 270–340 nm. It features stable performance, low toxicity, and excellent UV absorption efficiency. It is suitable for use in food-contact plastic packaging materials and children's plastic products.
THUV-328 offers good compatibility with a wide range of polymers and also exhibits antioxidant properties, allowing it to be used together with conventional antioxidants. As a high-performance UV absorber, it has a maximum UV absorption peak at 345 nm. Its photostability is comparable to that of UV-326 and UV-327, while providing better resin compatibility, lower thermal volatility, and improved resistance to washing.
It is widely applied in polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyester, epoxy resin, ABS resin, and cellulose resin systems. In addition, THUV-328 provides excellent light stabilization effects in various coating applications.
| English Name | 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol |
| English Synonyms | 2-(3,5-Di-tert-amyl-2-hydroxyphenyl)benzotriazole;HRsorb-328;2-(3',5'-di-t-aMyl-2'-hydroxy triazole;2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-Phenol;2-(2H-Benzotriazol-2-yl) 28;2-(2H-Benzotriazol-2-yl)-4,6-di-tert-amylphenol;UV ABSORBER UV-328 |
| CAS Number | 25973-55-1 |
| Molecular Formula | C22H29N3O |
| Molecular Weight | 351.49 |
| EINECS Number | 247-384-8 |
| Melting point | 80-83℃ |
| Boiling point | 469.1±55.0 °C(Predicted) |
| Density | 1.08±0.1 g/cm3(Predicted) |
| Vapor pressure | OPa at 20℃ |
| Storage conditions | -20°C Freezer |
| Solubility | DMSO (slightly soluble), ethyl acetate (slightly soluble), methanol (slightly soluble, ultrasonic treatment required) |
| Acidity coefficient (pKa) | 8.85±0.50(Predicted) |
| Form | Solid |
| Color | Grayish-white to pale yellow |
| InChI | InChl=1S/C22H29N3O/c1-7-21(3,4)15-13-16(22(5,6)8-2)20(26)19(14-15)25-23-17-11-9-10-12-18(17)24-2 5/h9-14,26H,7-8H2,1-6H3 |
| InChIKey | ZMWRRFHBXARRRT-UHFFFAOYSA-N |
| Smiles | C1(O)=C(C(C)(C)CC)C=C(C(C)(C)CC)C=C1N1N=C2C=CC=CC2=N1 |
| LogP | 7.3 at 25°℃ |
Product Application of Tinuvin 328 (UV Absorber) CAS#25973-55-1
THUV-328 is a high-performance UV absorber designed for use in a variety of polymer systems, including polyolefins (particularly polyvinyl chloride), polyesters, styrene-based polymers, polyamides, and polycarbonates.
