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Tiangang® UV-A

Liquid Benzotriazole UV Absorber
Chemical name Mixture of b-[3-(2-H-Benzotriazole-2-yl)-4-hydroxy-5-tert.butylphenyl]-propionic acidpoly(ethylene glycol) 300-ester, and Bis{b-[3-(2-H-Benzotriazole-2-yl)-4-hydroxy-5-tert.butylphenyl]-propionic acid}-poly(ethylene glycol) 300-ester
CAS number 104810-48-2; 104810-47-1; 25322-68-3
Molecular Weight 637 (monomer), 975 (dimer)
UV-A is a liquid UV absorber belonging to the hydroxyphenylbenzotriazole family. It exhibits a broad UV absorption, with high temperature and extraction resistance, making it particularly suitable for improving light stability of coatings with high durability demands, such as industrial coating and automotive coatings. For light sensitive substrates, such as wood and plastics, UV-A also provides efficient protection. The product is miscible with most common solvents. In waterborne system, it can be dispersed by dilution with a water miscible solvent such as butylcarbitol. When used together with a liquid hindered amine light stabilizer (HALS), such as HS-508 or HS-112, strong synergistic effects are observed.
Typical properties
Tiangang® UV-A Appearance Dynamic Viscosity
(@ 20°C, mPa*s)
(@ 20°C, g/cm3)
(g/100g solution, @ 20°C)
Yellow to light amber viscous liquid 7,400 1.17 >50 in most commonly used paint solvents;
<0.01 in water
Recommended Concentrations
Tiangang® UV-A 1.0% - 3.0%  UV-A, and 0.5 – 2.0%   HS-112 or HS-508
Tiangang® UV-A 25kg, 200kg plastic drums
Safety & handling
Tiangang® UV-A The use of proper protective equipment is recommended. Excess exposure to the product should be avoided. Wash thoroughly after handling. Store the product in a cool, dry, well ventilated area away from incompatible materials.
The information supplied is presented in good faith and has been derived from sources believed to be reliable. Since conditions of use are beyond our control, all risks are assumed by the user. No representation is expressed or implied, and nothing herein shall be construed as permission or recommendation to practice a patented invention without license.