a) Appearance: slightly yellowish powder
b) Melting Point: 137~142°C
c) Content(HPLC): 99% Min.
d) Transmittance:460nm≥95% 500nm≥97%
e) Ash:0.1% Max. f) Loss on drying:0.5% Max.
UV-326 is a benzotriazole type UV absorber. It has a high absorption in the wavelength of 290~400nm. It is also efficient for the light stabilization of polyvinyl chloride, unsaturated polyurethane, polystyrene,polycarbonate,coatings and lacquers.

CAS NO:3896-11-5

EC NO:223-445-4

Molecular Formula:C₁₇H₁₈ClN₃O

Molecular Weight:315.7973

Synonyms:;UV-326;2-(5-Chloro-2H-benzotriazol-2-yl)-6-tert-butyl-p-cresol(OH=1);Ultraviolet absorbent UV-326;UV 326;Bumetrizole;2-(2'-Hydroxy-3'-t-butyl-5'-methylphenyl)-5-chlorobenzotriazole;UV Absorber 326;

Molecular Structure: