Basic information
- Name:
Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide
- CAS No.:
162881-26-7
- Molecular Structure:

- Formula:
- C26H27O3P
- Molecular Weight:
- 418.46
- Deleted CAS:
- 725253-72-5
- Synonyms:
- Phosphineoxide, phenylbis(2,4,6-trimethylbenzoyl)- (9CI);Bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide;Methanone,1,1'-(phenylphosphinylidene)bis[1-(2,4,6-trimethylphenyl)-;Irgacure 819DW;
- EINECS:
- 423-340-5
- Density:
- 1.17 g/cm3
- Melting Point:
- 131-135 ºC
- Boiling Point:
- 590 ºC at 760 mmHg
- Flash Point:
- 310.6 ºC
- Solubility:
- soluble in acetone, acetonitrile, toluene, and hexanedioldiacrylate
- Hazard Symbols:
Xi- Risk Codes:
- 43-53
- Safety Description:
- 22-24-37-61 Details
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Chemistry
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IUPAC Name: [Phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone
Molecular Formula: C26H27O3P
Molecular Weight: 418.46 g/mol
Canonical SMILES: P(C(c1c(cc(cc1C)C)C)=O)(C(c1c(cc(cc1C)C)C)=O)(c1ccccc1)=O
InChI: InChI=1/C26H27O3P/c1-16-12-18(3)23(19(4)13-16)25(27)30(29,22-10-8-7-9-11-22)26(28)24-20(5)14-17(2)15-21(24)6/h7-15H,1-6H3
EINECS: 423-340-5
Classification Code: TSCA Flag P [A commenced PMN (Premanufacture Notice) substance]
Product Categories: Miscellaneous; Organic Photoinitiators;
Polymerization Initiators
Melting Point: 131-135 °C(lit.)
XLogP3-AA: 6
H-Bond Acceptor: 3
Index of Refraction: 1.588
Molar Refractivity: 120.14 cm3
Molar Volume: 356.7 cm3
Polarizability: 47.62×10-24 cm3
Surface Tension: 48.7 dyne/cm
Density: 1.17 g/cm3
Flash Point: 310.6 °C
Enthalpy of Vaporization: 88.03 kJ/mol
Boiling Point: 590 °C at 760 mmHg
Vapour Pressure of Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (CAS NO.162881-26-7): 6.78E-14 mmHg at 25 °C
Safety Profile
Hazard Codes:
Xi
Risk Statements: 43-53
R43: May cause sensitization by skin contact.
R53: May cause long-term adverse effects in the aquatic environment.
Safety Statements of Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (CAS NO.162881-26-7): 22-24-37-61
S22: Do not breathe dust.
S24: Avoid contact with skin.
S37: Wear suitable gloves.
S61: Avoid release to the environment. Refer to special instructions / safety data sheets.
Specification
Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (CAS NO.162881-26-7), its Synonyms are Methanone, 1,1'-(phenylphosphinylidene)bis(1-(2,4,6-trimethylphenyl)- ; Phosphine oxide, phenylbis(2,4,6-trimethylbenzoyl)- .

