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irgacure 819 (cas 162881-26-7) powder

Assay: 99% min

Appearance: Pale yellow powder

Capacity: 1000MT per year

Packaging: 20kg/Carton

Sample: available


related documents:

  • COA of irgacure 819 CAS 162881-26-7
  • TDS of irgacure 819 CAS 162881-26-7


Irgacure 819 Quick Details

Chemical Name: Irgacure 819

Other Name:Photoinitiator 819;Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide

Molecular Formula:C26H27O3P

Molecular Weight:418.46

Appearance: Pale yellow powder

Assay: 99.0%

Structure:Irgacure 819 structure

Quality:High purity, less impurities, good color


Irgacure 819 Typical Properties

Items Specifications
Appearance Pale yellow powder
Assay (HPLC) ≥99.0%
Melting point 131~135°C
Volatile matter ≤0.3%
Clarity Clear


what is Irgacure 819?

Irgacure 819 (chemical name: Phenylbis(2,4,6-trimethylbenzoyl)phosphineoxide ) is a highly efficient general-purpose UV photoinitiator for initiating UV polymerization of unsaturated prepolymerization systems. It can be used for the curing of thick film systems, especially for white systems, glass reinforced polyester/ Styrene system. It can also be used for outdoor varnish when used in combination with light stabilizers.


Irgacure 819 function

Photoinitiator 819 has been tested for printing inks and prepreg systems on wood, metal, plastic, paper and fiber surfaces.


In high opacity white paints, paints and inks containing titanium white or other pigments, the addition of a small amount of IRGACURE 819 gives the coating excellent cure and UV yellowing resistance. Since IRGACURE 819 has excellent absorption properties, it can be used in thick film systems.


Photoinitiator 819 can be used in conjunction with other photoinitiators such as IRGACURE 184 or IRGACURE 651. The combination of photoinitiator 819 and IRGACURE 651 is particularly suitable for curing polyester/styrene resin systems, such as glass fiber reinforced materials.


Since the photoinitiator 819 can be used in combination with an ultraviolet light absorber, such as TINUVIN 400, the photoinitiator 819 can be applied to a UV curable coating requiring weather resistance.


In white and thick film systems, there is the fastest cure speed. Although the yellow phase appears slightly at the time of curing, it has a photobleaching effect at a later stage.


IRGACURE 819 recommended dosage:

Clear acrylic and unsaturated polyester/styrene coatings 0.1 – 0.2% IRGACURE819 1 – 2% IRGACURE184

White acrylic and unsaturated polyester/styrene coatings 0.5 – 1% IRGACURE819 1 – 2% IRGACURE184

Colored acrylic formula 0.5 – 1% IRGACURE819 1 – 2% IRGACURE184

White Screen Printing Ink 0.5 – 1.5% IRGACURE819 1 – 2% IRGACURE184

Glass fiber reinforced unsaturated polyester/styrene prepreg 0.1 – 0.2% IRGACURE819


Safety and Operation of Irgacure 819 As an industrial chemical, the following precautions should be strictly observed:

1) Work in a clean, well-ventilated environment.

2) Wear eye masks to avoid irritation to the eyes.

3) The sensitivity of the photoinitiator 819 to visible light is determined, so direct sunlight should be avoided.

4) The product should be stored in a place where direct sunlight is avoided.


Irgacure 819 Packaging and Shipping

Packing:20kg/carton box.

Delivery: within 5-7 working days.


Irgacure 819 storage

Stored in a cool dry place out of direct sunlight.


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