Photoinitiator EMK, CAS No.: 90-93-7
Photoinitiator EMK is the commercial name commonly used for 4,4'-Bis(diethylamino)benzophenone, CAS 90-93-7. It is a Norrish Type II photoinitiator belonging to the benzophenone family and is particularly suitable for pigmented UV-curable and LED-curable formulations.
Chemical Name: 4,4'-Bis(diethylamino)benzophenone
IUPAC Name: 4-[4-(Diethylamino)benzoyl]-N,N-diethylaniline
Common Names: Photoinitiator EMK, EMK, DEAB, Michler's Ethyl Ketone, Michler Ethylketone
CAS No.: 90-93-7
EC No.: 202-025-4
Molecular Formula: C21H28N2O
Molecular Weight: 324.46 g/mol
Chemical Family: Benzophenone Photoinitiator

Appearance: Light yellow powder
Purity: 99.0% min
Melting Point: 93 - 95℃
Boiling point: 475.7°C at 760 mmHg
Flash point: 193.6°C
Highly pigmented UV-curable formulations, Black-pigmented UV curing systems, LED-curable coatings and inks ect.
20kg/carton.
6400MT/year.
Store in a cool, dry and well-ventilated area.
Keep the container tightly closed when not in use.
Protect the material from direct sunlight and excessive heat.
Hosea Chem® supplies Photoinitiator EMK CAS 90-93-7, 4,4'-Bis(diethylamino)benzophenone, for industrial 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, pigmented formulations, electronics and other radiation-curable systems.
For current pricing, specification, packaging and availability of Photoinitiator EMK, please contact Hosea Chem® for a product quotation and technical documentation.