Benzophenone

Application of benzophenone:

There are many varieties of benzophenone series products, which have been widely used in medicine, pesticides, dyes, plastics, coatings, daily chemicals, electronic chemicals and other fields. In many fields, it is mainly used as photoinitiator, ultraviolet absorber and pharmaceutical intermediate.

1. Photoinitiator

As an environmentally friendly green technology, light-curing technology has developed vigorously in recent years and has been widely used in coatings, inks, adhesives, electronic devices, optical fiber materials and other industries. The photoinitiator is the main component of the photocuring system, which plays a decisive role in the sensitivity of the curing system. Photoinitiators are divided into three categories: homolytic fragmentation, hydrogen transfer and cationic. Benzophenone-based hydrogen transfer photoinitiators are better than monomers and prepolymers due to their high quantum efficiency, fast curing speed, absorption spectrum matching the range of the irradiation light source, good thermal stability, and no dark reaction. good compatibility. The photo-curing film has no yellowing or discoloration, is cheap and safe to use, so it has become the photoinitiator with the largest output at present.

2. UV Absorber

Benzophenone UV absorbers are currently the most widely used and produced UV absorbers. In addition to absorbing ultraviolet light of 290-400nm, it also absorbs part of visible light. It is widely used in plastics, inks, paints, cosmetics and other industries because of its good compatibility with other materials.

3. Pharmaceutical intermediates

Benzophenone series products are the intermediates of many medicines. For example, benzophenone is the intermediate of anti-suspension drug diphenhydramine, 2-amino-5-chlorobenzophenone is the intermediate of tranquilizer medicine, 4- Chlorobenzophenone is used in the production of antiallergic drugs such as Anqimin. For example, ketoprofen, a highly effective anti-inflammatory and analgesic drug, is obtained from m-methylbenzophenone through bromination, cyanation, hydrolysis and methylation.

Basic information of benzophenone:

CAS: 119-61-9

Molecular formula: C13H10O

Molecular weight: 182.21800

Structural formula:

Physicochemical properties of benzophenone:

Appearance: white flake solid

Melting point: 47-51 °C

Density: 1.11 g/cm3

Boiling point: 305 °C

Flash point: >230 °F