Photoinitiator PBZ, CAS No.: 2128-93-0
Photoinitiator PBZ is the common name for 4-Phenylbenzophenone, CAS 2128-93-0. It is a Norrish Type II photoinitiator belonging to the benzophenone family and is designed for UV- and LED-curable formulations.
Chemical Name: 4-Phenylbenzophenone
Alternative Name: 4-Benzoylbiphenyl
IUPAC Name: [1,1'-Biphenyl]-4-yl(phenyl)methanone
Common Names: Photoinitiator PBZ, PBZ, SpeedCure PBZ, Genocure PBZ
CAS No.: 2128-93-0
EC No.: 218-345-2
Molecular Formula: C19H14O
Molecular Weight: 258.3 g/mol
Photoinitiator Type: Type II / Norrish Type II
Chemical Family: Benzophenone

Appearance: White powder
Purity: ≥ 99%
Melting Point: 99 - 101 °C
Volatile matter: ≤0.5%
Used as a pharmaceutical intermediate and a photocuring initiator; the unique odorless property of PBZ allows it to be used in direct contact with food and is widely used in various food packaging UV inks, varnishes and other systems with strong absorption performance.
20kg/drum.
5600MT/year.
Hosea Chem® supplies Photoinitiator PBZ CAS 2128-93-0, 4-Phenylbenzophenone, for UV and LED curing applications. As a China-based chemical manufacturer and supplier, Hosea Chem® supports bulk orders, export packaging and customized supply requirements for UV inks, industrial coatings, wood coatings, adhesives, pigmented systems and other radiation-curable formulations.
For current pricing, specification, packaging and availability of Photoinitiator PBZ, please contact Hosea Chem® for a product quotation and technical documentation.