UV Absorber 326 CAS#3896-11-5
Excellent UV Protection – Effectively absorbs ultraviolet radiation, providing outstanding protection against UV-induced degradation.
Superior Light Stability – Significantly enhances the light stability of plastics and other organic materials, helping extend their service life.
High-Performance Benzotriazole Technology – Belongs to the hydroxyphenylbenzotriazole class of UV absorbers, known for its reliable and efficient UV stabilization performance.
Wide Material Compatibility – Suitable for a variety of plastics and organic substrates, making it an ideal additive for diverse industrial applications.
UV-326 CAS#3896-11-5
UV-326 is an ultraviolet absorber presented as a light yellow crystalline powder with a melting point of 137–141°C. It is soluble in solvents such as styrene, benzene, and toluene, and effectively absorbs ultraviolet radiation in the 270–380 nm range. The product features low volatility and excellent compatibility with resins, and is widely used in polyolefins, polyvinyl chloride (PVC), unsaturated polyesters, polyamides, polyurethanes, epoxy resins, ABS resins, cellulose resins, as well as natural and synthetic rubber.
UV absorbers are additives designed to block or reduce the transmission of ultraviolet light. An effective UV absorber should exhibit good thermal stability, maintaining performance during high-temperature processing; low volatility; strong UV absorption, particularly in the 290–400 nm range; excellent chemical stability without reacting with formulation components; and good miscibility with target materials.
UV Absorber 326 Chemical Properties
| Melting point | 144-147 °C(lit.) |
| Boiling point | 460.4±55.0 °C(Predicted) |
| density | 1.26±0.1 g/cm3(Predicted) |
| vapor pressure | 0Pa at 20℃ |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | Chloroform (Slightly), Ethyl Acetate (Slightly), Methanol (Slightly) |
| pka | 9.31±0.48(Predicted) |
| form | Solid |
| color | Pale Yellow to Light Yellow |
| Water Solubility | 4μg/L at 20℃ |
| Cosmetics Ingredients Functions | LIGHT STABILIZER |
| InChI | InChI=1S/C17H18ClN3O/c1-10-7-12(17(2,3)4)16(22)15(8-10)21-19-13-6-5-11(18)9-14(13)20-21/h5-9,22H,1-4H3 |
| InChIKey | OCWYEMOEOGEQAN-UHFFFAOYSA-N |
| SMILES | C1(O)=C(C(C)(C)C)C=C(C)C=C1N1N=C2C=C(Cl)C=CC2=N1 |
| LogP | 6.580 (est) |
| CAS DataBase Reference | 3896-11-5(CAS DataBase Reference) |
| EPA Substance Registry System | 2-tert-Butyl-6-(5-chloro-2H-benzotriazol-2-yl)-p-cresol (3896-11-5) |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38-53 |
| Safety Statements | 26-36-61 |
| WGK Germany | 1 |
| TSCA | TSCA listed |
| HS Code | 29339900 |
| Storage Class | 11 - Combustible Solids |
UV-326 CAS#3896-11-5
UV-326 is a benzotriazole-based ultraviolet absorber, chemically known as 2'-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole. It effectively absorbs ultraviolet radiation in the 280–370 nm range.
The product features good stability, low toxicity, and no irritation to the human body. It is widely used in coatings, synthetic rubber, synthetic fibers, and photosensitive materials. It significantly improves the lightfastness of these materials and helps reduce yellowing and aging caused by ultraviolet exposure from sunlight.
