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Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate Structure
Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate structure
CAS No.
84434-11-7
Chemical Name:
Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
Synonyms
TPO-L;BENZOPHENONE-1;ethyl trimethylbenzoyl phenylphosphinate;ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate;Photoinitiator TPO-L;IHT-PI TPO-L;4-BENZORESORCINOL;2,4,6-Trimethylbenzoyldi-Phenylphosphinate;2,4,6-trimethylbenzoylethoxyphenylphosphine oxide;2,4,6-TRIMETHYLBENZOYLPHENYLPHOSPHINIC ACID ETHYL ESTER
CBNumber:
CB9855469
Molecular Formula:
C18H21O3P
Molecular Weight:
316.33
MDL Number:
MFCD08692488
MOL File:
84434-11-7.mol
MSDS File:
SDS
Last updated:2026-04-08 17:12:49
Product description Number Pack Size Price
Ethyl Phenyl(2,4,6-trimethylbenzoyl)phosphinate min. 95.0 % E0908 25G $60
Ethyl Phenyl(2,4,6-trimethylbenzoyl)phosphinate min. 95.0 % E0908 100G $149
p-Phenyl-p-(2,4,6-trimethylbenzoyl)phosphinicAcidEthylEster P337600 100g $545
p-Phenyl-p-(2,4,6-trimethylbenzoyl)phosphinicAcidEthylEster 61230 1g $610
p-Phenyl-p-(2,4,6-trimethylbenzoyl)phosphinicAcidEthylEster 61230 100g $950
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Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate Properties

Melting point 144.5-147 °C(lit.)
Boiling point 456.0±55.0 °C(Predicted)
Density 1.14
vapor pressure 0Pa at 20℃
refractive index 1.5610
Flash point 184°
storage temp. under inert gas (nitrogen or Argon) at 2-8°C
solubility 71.8g/L in organic solvents at 20 ℃
form Oil to Thick Oil
color Colourless to Yellow
Water Solubility 35mg/L at 25℃
Cosmetics Ingredients Functions UV ABSORBER
InChI InChI=1S/C18H21O3P/c1-5-21-22(20,16-9-7-6-8-10-16)18(19)17-14(3)11-13(2)12-15(17)4/h6-12H,5H2,1-4H3
InChIKey ZMDDERVSCYEKPQ-UHFFFAOYSA-N
SMILES P(C1=CC=CC=C1)(C(=O)C1=C(C)C=C(C)C=C1C)(OCC)=O
LogP 2.91 at 25℃
CAS DataBase Reference 84434-11-7(CAS DataBase Reference)
FDA UNII 71TY9W41AJ
UNSPSC Code 12352100
NACRES NA.21

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P305+P351+P338
Hazard Codes  Xi
Risk Statements  36
Safety Statements  26
WGK Germany  2
RTECS  DJ0700000
Storage Class 10 - Combustible liquids
Hazard Classifications Aquatic Chronic 2
Skin Sens. 1B

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate price

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
TCI Chemical E0908 Ethyl Phenyl(2,4,6-trimethylbenzoyl)phosphinate min. 95.0 % 84434-11-7 25G $60 2026-04-30 Buy
TCI Chemical E0908 Ethyl Phenyl(2,4,6-trimethylbenzoyl)phosphinate min. 95.0 % 84434-11-7 100G $149 2026-04-30 Buy
TRC P337600 p-Phenyl-p-(2,4,6-trimethylbenzoyl)phosphinicAcidEthylEster 84434-11-7 100g $545 2021-12-16 Buy
Medical Isotopes, Inc. 61230 p-Phenyl-p-(2,4,6-trimethylbenzoyl)phosphinicAcidEthylEster 84434-11-7 1g $610 2021-12-16 Buy
Medical Isotopes, Inc. 61230 p-Phenyl-p-(2,4,6-trimethylbenzoyl)phosphinicAcidEthylEster 84434-11-7 100g $950 2021-12-16 Buy
Product number Packaging Price Buy
E0908 25G $60 Buy
E0908 100G $149 Buy
P337600 100g $545 Buy
61230 1g $610 Buy
61230 100g $950 Buy

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate Chemical Properties,Uses,Production

Uses

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate(Photoinitiator TPO-L) is a liquid photoinitiator for low yellowing, low odor formulations, commonly used in screen printing inks, lithographic printing inks, flexo printing inks, photoresists, varnishes, printing Plates and other fields.

Chemical Properties

2,4,6-Trimethylbenzoylphenylphosphonic acid ethyl ester is yellow oily to thick oily liquid at room temperature and pressure, slightly soluble in water but easily soluble in organic solvents such as dimethyl sulfoxide, its structure has a large conjugate system, its absorption wavelengths of 299 and 366 nm, can be used to stimulate the ultraviolet polymerization reaction, in the process of UV polymerization curing process, it is able to trigger the polymerization of resin reaction.

Uses

P-Phenyl-P-(2,4,6-trimethylbenzoyl)-Phosphinic acid Ethyl Ester is a photoinitiator for UV curable coatings.

Definition

ChEBI: Ethyl (mesitylcarbonyl)phenylphosphinate is a member of benzoic acids.

Flammability and Explosibility

Non flammable

Synthesis

0.1 mol phenylphosphinic acid and 100 mL chlorobenzene were added to the reaction vessel. 0.11 mol 2,4,6-trimethylbenzaldehyde was added dropwise under controlled temperature, followed by 2 hours of incubation at 100-120°C. After cooling, pH was adjusted to 4-6 with hydrochloric acid, then 0.13 g vanadium acetylacetonate was added as a catalyst. 0.15 mol of 35% hydrogen peroxide was added dropwise at a rate of 5-10 drops per minute, with the mixture insulated at 5-10°C. The reaction was monitored by TLC until completion.
The reaction mixture was diluted with 100 mL water, neutralized with saturated sodium bicarbonate, and the organic layer was separated and washed twice with water. Excess oxidant was reduced with aqueous sodium sulfite, and the organic layer was separated and washed again. The mixture was dehydrated with anhydrous sodium sulfate, filtered to remove the desiccant.
To the dehydrated organic layer, 0.11 mol sodium hydroxide was added, followed by dropwise addition of 0.55 mol diethyl sulfate at 60-80°C. After the reaction was complete, the mixture was adjusted to pH 8-10 with sodium hydroxide, washed with water, and the organic layer was separated. The organic layer was dried over anhydrous sodium sulfate, filtered, and the solvent was evaporated under reduced pressure to yield Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate.

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate synthesis

1754-49-0
938-18-1
84434-11-7
Synthesis of Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate from DIETHYL PHENYLPHOSPHONATE and 2,4,6-Trimethylbenzoyl chloride

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate Preparation Products And Raw materials

Raw materials

Diethyl sulfate Phenylphosphinic acid

Preparation Products

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate Suppliers

Global( 388)Suppliers
Supplier Tel Email Country ProdList Advantage
Hu Bei Jiutian Bio-medical Technology CO.,Ltd
027-88013699 17354350817 Ryan@jiutian-bio.com China 5945 58
Shandong Deshang Chemical Co., Ltd.
+86-0531-8875-2665 +8613153039501 info@deshangchem.com China 661 58
Nantong Root King lmport&Export Co.,Ltd
+86-13951333918 +86-15725632777 sales@ntrootking.com China 190 58
Hebei Chuanghai Biotechnology Co., Ltd 		+8615350571055 Sibel@chuanghaibio.com China 8738 58
Hebei Yanxi Chemical Co., Ltd. 		+8618531123677 faithe@yan-xi.com China 5853 58
Hebei Chuanghai Biotechnology Co,.LTD 		+86-86-13131129325 +8613131129325 sales1@chuanghaibio.com China 5235 58
Henan Fengda Chemical Co., Ltd 		+86-371-86557731 +86-13613820652 info@fdachem.com China 20124 58
Hebei Zhuanglai Chemical Trading Co Ltd 		+86-16264648883 niki@zlchemi.com China 7245 58
Capot Chemical Co.,Ltd. 		+86-（0）57185586718; +8613336195806 sales@capot.com China 29640 60
Shanghai Daken Advanced Materials Co.,Ltd 		+86-2158073036 info@dakenam.com China 13843 58
Supplier Advantage
Hu Bei Jiutian Bio-medical Technology CO.,Ltd
58
Shandong Deshang Chemical Co., Ltd.
58
Nantong Root King lmport&Export Co.,Ltd
58
Hebei Chuanghai Biotechnology Co., Ltd 		58
Hebei Yanxi Chemical Co., Ltd. 		58
Hebei Chuanghai Biotechnology Co,.LTD 		58
Henan Fengda Chemical Co., Ltd 		58
Hebei Zhuanglai Chemical Trading Co Ltd 		58
Capot Chemical Co.,Ltd. 		60
Shanghai Daken Advanced Materials Co.,Ltd 		58

Related articles

Related Qustion

Ask a question
Q:Can Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate(TPO-L) be used with 3D printing resins?Zora - Apr 8，2026
A:Yse! Biocompatibility is important for the 3D printing of resins used in medical devices and can be affected by photoinitiators, one of the key additives used in the 3D printing process. The Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate(TPO-L) photoinitiator showed excellent biocompatibility and colour stability and possessed with an acceptable dimensional accuracy for use in the 3D printing of resins. Therefore, the TPO-L photoinitiator can be sufficiently used as a photoinitiator for dental 3D-printed resin.

View Lastest Price from Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Photoinitiator TPO-L pictures 2026-04-30 Photoinitiator TPO-L
84434-11-7
 US $0.00 / Kg/Drum 1KG 95% 500mt/year Jinan Finer Chemical Co., Ltd
Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate/TPO-L pictures 2026-04-30 Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate/TPO-L
84434-11-7
 US $0.00-0.00 / kg 1kg 98%min 10 tons WUHAN FORTUNA CHEMICAL CO., LTD
Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate pictures 2026-04-30 Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
84434-11-7
 US $0.00 / kg 1kg 99%min 20tons HANGZHOU HAILAN CHEMICAL CO.,LTD.

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4-BENZORESORCINOL 4-BENZOYLRESORCINOL JRcure TPO-L PI-TPO-L photo sensitizer TPO-L Phenyl(2,4,6-trimethylbenzoyl)phosphinic acid ethyl ester SYNSORB SPEEDCURE TPO-L 2,4,6-TRIMETHYLBENZOYLPHENYLPHOSPHINIC ACID ETHYL ESTER DIHYDROXYBENZOPHENONE(2,4-) ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate SYNSORBBP-1,2,4-DIHYDROXYBENZOPHENONE IHT-PI TPO-L Ethoxyphenyl(2,4,6-trimethylbenzoyl)phosphine oxide Lucirin TPOL 2,4,6-trimethyl-benzoyl-ethoxyphenyl- Einecs 282-810-6 p-Phenyl-p-(2,4,6-triMethylbenzoyl)phosphinic Acid Ethyl Ester OMINIRAD TPO-L(former LUCIRIN TPO-L) HRcure-TPO-L 2,4,6-Trimethylbenzoyldi-Phenylphosphinate Phosphinic acid, phenyl(2,4,6-trimethylbenzoyl)-, ethyl ester Phosphinic acid, P-phenyl-P-(2,4,6-trimethylbenzoyl)-,ethyl ester Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate(TPO-L) YF-PI TPO-L ethyl (2,4,6-trimethylbenzoy Ethyl(2,4,6-trimethylbenzoyl)phenylphosphinChemicalbookate Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate ISO 9001：2015 REACH PHOTO INITIATOR TRUELICHT TPO-L Ethyl(2,4,6-trimethylbenzoyl)phenylphosphChemicalbookinate Photoinitiator TPO-L Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate Ethyl(2,4,6-trimethylbenzoyl)phenylphosph Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate TPO-L Photoinitiator TPO-L Sinocure? TPO-L / Irgacure TPO-L / Omnirad TPO-L Ethyl(2,4,6-trimethylbenzoyl)pheChemicalbooknylphosphinate Ethyl(2,4,6-trimethylbenzoyl)phenylphospChemicalbookhinate 2,4,6-trimethylbenzoylphosphonic acid ethyl ester APi-TPO-L 2.4.6-Trimethylbenzoylethoxyphenylphosphine Omnirad TPO-L Ethyl mesitylcarbonyl(phenyl)phosphinate 2,4,6-Trimethylbenzoylphosphonate Acylphosphineoxides（1110） Ethyl?Phenyl(2,4,6-trimethylbenzoyl)phosphinate/TPO-L Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate 94.5% Ethyl (2,4,6-trimethylbenzoyl) phenylphosphite Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate?-4 Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate(Photoinitiator TPO-L) ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate 2,4,6-trimethylbenzoylethoxyphenylphosphine oxide BENZOPHENONE-1 Photoinitiator TPO-L TPO-L ethyl trimethylbenzoyl phenylphosphinate 84434-11-7 C18H21O3P Organic Building Blocks Ketones