Product Name:    Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide
Synonyms:    PHENYLBIS(2,4,6-TRIMETHYLBENZOYL)PHOSPHINE OXIDE;Phosphine oxide, phenylbis(2,4,6-trimethylbenzoyl)-;Photoinitiator 819;Phenylbis(2,4,6-triMethylbenzoyl)phosphine oxide 97%, powder;(Phenylphosphoryl)bis(mesitylmethanone);former IRGACURE 819;OMNIRAD 380;OMNIRAD 819
CAS:    162881-26-7
MF:    C26H27O3P
MW:    418.47
EINECS:    423-340-5
Product Categories:    Miscellaneous;Organic Photoinitiators;Polymerization Initiators
Mol File:    162881-26-7.mol
Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide Structure
Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide Chemical Properties
Melting point     131-135 °C(lit.)
Boiling point     590.0±60.0 °C(Predicted)
density     1.17±0.1 g/cm3(Predicted)
storage temp.     Sealed in dry,Room Temperature
solubility     acetone, acetonitrile, toluene, and hexanedioldiacrylate: soluble
form     powder
λmax    366nm(MeOH)(lit.)
InChIKey    GUCYFKSBFREPBC-UHFFFAOYSA-N
CAS DataBase Reference    162881-26-7
EPA Substance Registry System    Phosphine oxide, phenylbis(2,4,6-trimethylbenzoyl)- (162881-26-7)
Safety Information
Hazard Codes     Xi
Risk Statements     43-53
Safety Statements     22-24-37-61
WGK Germany     -
HS Code     29319090

Specification

UV absorption spectra

Character and Application:

TPO appears light yellow powdermelting point is at 90-94'Cand it has enough solubility in active diluents. Since it has a wide range of absorptionthe typical absorptions are at 365nm380nm400 nmand the maximum absorption wavelength is about 425nmits absorption range is wider than conventional photoinitiatorsand it can absorb well different wavelength UV-lights. It can generate two free radicals——benzoyl and phosphorus acyl which both can initiatepolymerizationthereforeitsphotocuring speed is fastand that it has light-decolourizatiois suitable for thick film deep curingmoreoverthe coating doesn’t turn to yellowand it is also fit for water basewith the characteristic of low volatilitymild smell and anti-yellowing.

This product usually be used in the white systemcan be used in UV cure coatingsprinting inkUV curing adhesivesoptical fiber coatingslight stabilizerlight polymerization formestereo surface plate resincomposite materials and teeth filling material etc..

The usage of this product should base on the results of practicalexperimentsand the suggested volume of addition is 0.5-5 % (w/w).

  In consideration of that TPO also absorbs a little in the visible regionit should be protected from light in the process of storage and transportation.

Advantages: 

1. Its photocuring speed is fast

2. Have light-decolourizatio

3. Can be used for thick coating curing  

4. Belongs to low-volatilitymild-smell and environment friendly product

5. Anti-yellowing 

in 2011 we entered the fine chemical market of noble metal catalyst ,organic phosphine ligands and oled intermediates.with the joint efforts of our senior experts and professional technicians, tianfu has developed more than 500 compounds, which are widely used in the fields of production and life science. the objective of the company is to put quality first and put our customer’s needs first - the satisfaction of our customers is the company's ultimate goal. improving product quality and service level is our responsibility, and creating more value for our customer’s is our purpose. we are constantly striving to make henan tianfu a leading chemical supplier, and hope to create a better future with you.