Benzil Dimethyl Ketal 651 BDK LED UV polymer light curing CAS 24650-42-8


SKU: 9145554023691 Category:


Synonyms: Photoinitiator 651, Irgacure 651, Omnirad 651, Benzil Dimethyl Ketal, BDK

CAS: 24650-42-8

MF: C16H16O3

MW: 256.3

EINECS: 246-386-6

Properties of Irgacure 651 Benzil Dimethyl Ketal CAS 24650-42-8

Appearance: white crystalline powder
Density: 1.122g/cm3
Melting Point: 67-70 °C(lit.)
Flash Point: 190 °C
Boiling Point: 169°C 7mm
Refractive Index: 1.564 (25ºC)
Vapour Pressure: 1.06E-05mmHg at 25°C

Applications of Irgacure 651 Benzil Dimethyl Ketal CAS 24650-42-8

Irgacure 651 is a highly effective UV photoinitiator for initiating polymerization of unsaturated prepolymer systems. For example, acrylic resin and vinyl monomers with single or multi-functional groups.

Irgacure 651 can be used in unsaturated polyester, unsaturated styrene paint, wood coatings or primers. It can also be used in unsaturated acrylic resin ink and varnish (paper, plastic, metal surface).

In UV curable polyurethane acrylate coatings, a light stabilizer can be added to prevent yellowing.

Suggested dosage:

Film thickness: 5-20 nm,  2-4%  of Irgacure 651

Film thickness: 20-200 nm,  1-3% of Irgacure 651

Specific dosage should be based on the actual experimental results, Irgacure 651 is sensitive to light, should avoid exposure to sunlight, open packaging should be re-sealed as soon as possible.

Additional information


1kg, 10 grams, 50 grams, 100 grams, 250 grams, 500 grams