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Name	Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide	EINECS	278-355-8
CAS No.	75980-60-8	Density	1.17 g/cm³
PSA	43.95000	LogP	4.76610
Solubility	3.4mg/L at 20℃	Melting Point	88-92 °C
Formula	C₂₂H₂₁O₂P	Boiling Point	519.6 °C at 760 mmHg
Molecular Weight	348.381	Flash Point	268.1 °C
Transport Information	N/A	Appearance	white or cream powder
Safety	22-24/25	Risk Codes	22
Molecular Structure		Hazard Symbols	Xn
Synonyms	TPO;Methanone,(diphenylphosphinyl)(2,4,6-trimethylphenyl)-;	Article Data	36

Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide Synthetic route

: α-hydroxy-(2,4,6-trimethylbenzyl)diphenyl phosphine oxide

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
With manganese(IV) oxide In dichloromethane at 20℃;	98%
With vanadium(V) oxide; dihydrogen peroxide at 8 - 25℃; for 3.5h; Reagent/catalyst; Green chemistry;	96%
With tert.-butylhydroperoxide In dichloromethane at 5 - 20℃; for 6.5h; Reagent/catalyst;	92.5%

: 487-68-3
mesytaldehyde

: 4559-70-0
Diphenylphosphine oxide

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
Stage #1: mesytaldehyde; Diphenylphosphine oxide In dichloromethane for 6h; Green chemistry; Stage #2: With ammonium metavanadate; dihydrogen peroxide at 8 - 20℃; for 5.5h; Reagent/catalyst; Green chemistry;	98%

: 39150-04-4
diphenyl n-pentyloxyphosphine

: 938-18-1
mesitylene-2-carboxylic acid chloride

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
at 50 - 90℃; for 9.33333h;	95.8%

: 65119-90-6
(sec-butyloxy)di(phenyl)phosphine

: 938-18-1
mesitylene-2-carboxylic acid chloride

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
at 50 - 90℃; for 7.33333h;	95.6%

: 719-80-2
Ethyl diphenylphosphinite

: 938-18-1
mesitylene-2-carboxylic acid chloride

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
at 40 - 90℃; for 8h; Time; Green chemistry;	95.1%
With N,N-dimethyl-cyclohexanamine at 80 - 85℃; Product distribution / selectivity;

: 92556-46-2
diphenyl n-propoxyphosphine

: 938-18-1
mesitylene-2-carboxylic acid chloride

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
at 50 - 90℃; for 7.33333h;	95.1%

: 38011-61-9
diphenyl sec-pentyloxyphosphine

: 938-18-1
mesitylene-2-carboxylic acid chloride

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
at 50 - 90℃; for 7.33333h;	94.9%

: 13360-94-6
(n-butyloxy)di(phenyl)phosphine

: 938-18-1
mesitylene-2-carboxylic acid chloride

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
at 50 - 90℃; for 9.33333h;	94.8%

: 149731-53-3
(2,4,6-trimethylbenzyl)diphenylphosphine oxide

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
With tert.-butylhydroperoxide; bis(acetylacetonate)oxovanadium In dichloromethane at 20℃;	94%

: 64-17-5
ethanol

: 1079-66-9
chloro-diphenylphosphine

: 938-18-1
mesitylene-2-carboxylic acid chloride

: 75980-60-8
(2,4,6-trimethylbenzoyl)diphenylphosphine oxide

Conditions

Conditions	Yield
Stage #1: ethanol With sodium In toluene at 65 - 70℃; for 2h; Stage #2: chloro-diphenylphosphine In toluene at 5 - 10℃; for 1h; Stage #3: mesitylene-2-carboxylic acid chloride In toluene at 70 - 75℃; for 5h; Temperature; Solvent;	92.2%

Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide Chemical Properties

IUPAC Name: Diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone
Following is the structure of 2,4,6-Trimethylbenzoyldiphenylphosphine Oxide (CAS NO.75980-60-8):

Molecular formula: C₂₂H₂₁O₂P
Molecular Weight: 348.37 g/mol
EINECS: 278-355-8
Index of Refraction: 1.6
Molar Refractivity: 101.52 cm³
Molar Volume: 296.6 cm³
Density: 1.17 g/cm³
Flash Point: 268.1 °C
Melting point: 88-92 °C(lit.)
Surface Tension: 48.4 dyne/cm
Enthalpy of Vaporization: 79.24 kJ/mol
Boiling Point: 519.6 °C at 760 mmHg
Vapour Pressure: 6.71E-11 mmHg at 25°C
Product Categories of 2,4,6-Trimethylbenzoyldiphenylphosphine Oxide (CAS NO.75980-60-8): Functional Materials; Photopolymerization Initiators; Miscellaneous; Organic Photoinitiators; Polymerization Initiators
Stability of 2,4,6-Trimethylbenzoyldiphenylphosphine Oxide (CAS NO.75980-60-8): Stable. Incompatible with strong oxidizing agents.
Appearance of 2,4,6-Trimethylbenzoyldiphenylphosphine Oxide (CAS NO.75980-60-8): white or cream powder
Canonical SMILES: CC1=CC(=C(C(=C1)C)C(=O)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3)C
InChI: InChI=1S/C22H21O2P/c1-16-14-17(2)21(18(3)15-16)22(23)25(24,19-10-6-4-7-11-19)20-12-8-5-9-13-20/h4-15H,1-3H3
InChIKey: VFHVQBAGLAREND-UHFFFAOYSA-N

Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide Safety Profile

Hazard Codes: Xn
The Risk Statements information: 22
22: Harmful if swallowed
The Safety Statements information: 22-24/25
22: Harmful if swallowed
24/25: Avoid contact with skin and eyes
WGK Germany:2

Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide Specification

2,4,6-Trimethylbenzoyldiphenylphosphine Oxide , its cas register number is 75980-60-8. It also can be called Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide . Its classification code is TSCA Flag P [A commenced PMN (Premanufacture Notice) substance].

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