UV Absorber UV-234 (70321-86-7)
1. Basic Information
1. Chemical Name: UV Absorber UV-234
2. Chinese Aliases: UV Absorber UV-234; UV Absorbent 234; 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol
3. English Name: UV Absorber 234
4. Molecular Formula: C₁₄H₁₂N₄O
5. Molecular Weight: 256.27
6. CAS Number: 70321-86-7
7. EINECS Number: 274-581-6
8. Appearance: Light yellow to light brown crystalline powder, no obvious odor, easily soluble in organic solvents, insoluble in water, good thermal stability
2. Technical Specifications
Item | Standard | Qualified Grade | Premium Grade
--- | --- | --- | ---
Benzotriazole Content, % ≥ | 99.0 | 99.5
Melting Point, ℃ | 137-141 |
Ash Content, % ≤ | 0.05 |
Volatile Matter, % ≤ | 0.30 |
Transmittance, % ≥ | |
460nm | 97.0 | 97.5
500nm | 98.0 | 98.0
Zinc Content, ppm ≤ | — | 3.0
Iron Content, ppm ≤ | — | 7.0
Mechanical Impurities | |
0.31mm and above, EA | — | 0
0.11-0.30mm, EA | — | 8
0.10mm and below, EA | — | 20
(Note: The above parameters are for reference. Please refer to the actual factory test sheet for specifics.)
3. Packaging Specifications
1. 25 kg cardboard drum, double-layer PE bag liner
2. Can be customized into ton bags or small packages according to customer requirements