Products Description of UV Absorber 326 CAS#3896-11-5
Ultraviolet absorbers are functional additives intended to block excessive ultraviolet radiation from penetrating materials. High-performance ultraviolet absorbers require superior thermal stability to retain their functionality during processing while featuring low thermal volatility. They must deliver strong ultraviolet absorption, primarily within the wavelength range of 290–400 nm. Meanwhile, they should maintain favourable chemical stability and avoid adverse interactions with other components in the substrate system.
Furthermore, ultraviolet absorbers need good compatibility and dispersibility within materials to prevent blooming or migration. The absorbers themselves are expected to have robust photochemical stability, resisting photodegradation and discoloration. Optimal UV absorbers are colourless, odourless, non-toxic, water-resistant and economically viable.
According to chemical structural differences, ultraviolet absorbers are divided into multiple types: salicylates, benzophenones, benzotriazoles, substituted acrylonitriles and triazines. Once applied to textiles, these additives achieve outstanding ultraviolet shielding capacity, mitigating colour fading and enhancing the light fastness of disperse dyes for polyester. UV Absorber UV-326 serves as a typical representative of this class of products.
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℃ |
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 |
HS Code | 29339900 |
Product Application of UV Absorber 326 CAS#3896-11-5
It is mainly incorporated into materials including polyvinyl chloride (PVC), polystyrene, unsaturated resins, polycarbonate, polymethyl methacrylate (PMMA), polyethylene, ABS resins and epoxy resins to offer ultraviolet shielding and improve the stability of substrates.
