UV Absorber 328
Hosea Chem® supplies UV Absorber 328, CAS 25973-55-1, a hydroxyphenyl benzotriazole UV absorber for plastics, polyolefins, polyester, PVC, coatings and polymer stabilization with bulk supply from China. Send Inquiry
Product Description
UV Absorber 328, CAS No.: 25973-55-1
UV Absorber 328 is a hydroxyphenyl benzotriazole UV absorber with the chemical name 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol. It is also known as UV-328, Tinuvin 328, Uvinul 3028 and other commercial or industry names.
Product Chemical Properties
Chemical Name: 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Alternative Chemical Name: 2-(2H-Benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol
IUPAC Name: 2-(benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol
Common Names: UV Absorber 328, UV-328, UV 328, Tinuvin 328, Uvinul 3028, Omnistab 328, Songsorb 3280
CAS No.: 25973-55-1
Molecular Formula: C22H29N3O
Molecular Weight: 351.49 g/mol
EC No.: 247-384-8
Chemical Class: Hydroxyphenyl benzotriazole UV absorber
Product Technical Specification
Appearance: Light yellow powder or cylindrical granules
Purity: ≥99% (HPLC)
Melting Point: 79 - 87℃
Ash: ≤0.1%
Volatile Matter: ≤0.5%
Transmittance: 460nm ≥96%, 500nm ≥97%
Applications of UV Absorber 328
1. This product is a high-efficiency UV absorber capable of effectively absorbing ultraviolet light in the 270–340 nm wavelength range.
2. Its light-stabilizing performance is comparable to that of UV-326 and UV-327; however, it offers superior resin compatibility, low thermal volatility, and high resistance to washing.
3. It is primarily used in polymers such as polyolefins (especially polyethylene), polyesters, styrenic polymers, polyamides, polymethyl methacrylate (PMMA), polycarbonates, and elastomers.
Recommended addition amount
Polystyrene Polyethylene Polyester Polycarbonate Polyvinyl chloride
0.2 - 0.5% 0.2 - 0.4% 0.3 - 0.5% 0.15 - 0.3% 0.2 - 0.5%
Packaging
20kg carton or cardboard drum.
Production Capacity
4800MT/year.
Storage Requirements
Store UV Absorber 328 in a cool, dry and well-ventilated area.
Keep the product in tightly closed original packaging and protect it from moisture, excessive heat and direct sunlight.
UV Absorber 328 Bulk Supply from China
Hosea Chem® supplies UV Absorber 328, CAS 25973-55-1, for industrial applications requiring benzotriazole-based UV protection and polymer stabilization.