UV Absorbers 328
Basic Information:
Product name: UV Absorbers 328
Chemical name: 2-(2 ‘-hydroxy-3′,5 ‘-di-tert-amyl phenyl) benzotriazole
Synonyms:
2-(3,5-Di-tert-amyl-2-hydroxyphenyl)benzotriazole;HRsorb-328;2-(3′,5′-di-t-aMyl-2′-hydroxyphenyl)benzotriazole;2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-Phenol;2-(2H-Benzotriazol-2-yl)-4,6-di-t;UV-328;2-(2H-Benzotriazol-2-yl)-4,6-di-tert-amylphenol;UVABSORBERUV-328
CAS number: 25973-55-1
Molecular formula: C22H29N3O
Molecular weight: 351.49
EINECS Number: 247-384-8
Structural formula:
Related categories: chemical intermediates; ultraviolet absorbent; light stabilizer; organic chemical raw materials;
Description ：Benzotriazole ultraviolet absorbent
Appearance ：White - light yellow powder
Melting point: 80-83°C
Boiling point: 469.1±55.0°C (Predicted)
Density 1.08±0.1 g/cm3 (Predicted)
Steam pressure: 0 Pa at 20℃
Solubility: soluble in toluene,styrene, cyclohexane, methyl methacrylate, ethyl acetate, ketones, etc., insoluble in water.
Properties: Light yellow powder.
LogP: 7.3 at 25℃
Dangerous Goods Mark Xi,Xn
Hazard category code 36/37/38-53-48/22
Safety instructions - 36-61-22-26 wgkgermchemicalbookany2 53
Customs Code 2933.99.8290
Hazardous Substances Data 25973-55-1(Hazardous Substances Data)
| Specification | Unit | Standard |
| Appearance | Light yellow powder | |
| Melting point | ℃ | ≥80.00 |
| Ash content | % | ≤0.10 |
| Volatiles | % | ≤0.50 |
| Light transmittance | ||
| 460nm | % | ≥97.00 |
| 500nm | % | ≥98.00 |
| Main content | % | ≥99.00 |
UV 328 Is a 290-400nm UV absorber with good light stabilization effect-through photochemistry; the product has strong absorption of ultraviolet light, low initial color on product color, easily soluble in plasticizer and monomer system,low volatile, and has good compatibility with most base materials; in outdoor products, can be used with phenolic antioxidant and phosphate ester antioxidantand hindered amine photostabilizer.
Mainly used in polyolefin, PVC, HDPE, styrene single and copolymer, ABS, acrylic polymer, unsaturated polyester, polythermoplastic polyamine, wet curing polyurethane, polyacetal, PVB (polyvinyl butyaldehyde), epoxy and polyurethane two-component system, alcohol acid and thermosetting acrylic magnetic paint system; also used in automotive coatings, industrial coatings, wood coatings.
Add amount: 1.0-3.0%, the specific add amount is determined according to thecustomer application test.
Packed in 20Kg/25Kg kraft paper bag or carton.
Avoid sunlight, high light, moisture, and light stabilizers containing sulfur or halogen elements. It needs to be stored in sealed, dry and away from light.
