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84434-11-7 Usage


Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate, also known as Photoinitiator TPO-L, is a liquid photoinitiator that is specifically designed for low yellowing and low odor formulations. It is a versatile compound that offers a range of benefits in various applications due to its unique chemical properties.


Used in Printing Industry:
Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is used as a photoinitiator in screen printing inks for its ability to provide low yellowing and low odor results, ensuring high-quality prints with minimal environmental impact.
Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is also used as a photoinitiator in lithographic printing inks, contributing to the production of clear and sharp prints with reduced odor and yellowing.
Used in Flexographic Printing Industry:
In flexo printing inks, Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate serves as a photoinitiator that helps in achieving high-quality prints with minimal yellowing and odor, making it suitable for a wide range of applications.
Used in Photoresist and Varnish Industry:
Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is used as a photoinitiator in photoresists and varnishes, offering low yellowing and low odor properties that are essential for creating high-quality coatings and resists.
Used in Printing Plate Industry:
In the production of printing plates, Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is utilized as a photoinitiator to ensure the creation of plates with excellent print quality, low yellowing, and minimal odor.
Overall, Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is a valuable compound in the printing and coating industries due to its role as a photoinitiator that promotes low yellowing and low odor formulations, enhancing the quality and sustainability of various products.

Flammability and Explosibility


Check Digit Verification of cas no

The CAS Registry Mumber 84434-11-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,4,3 and 4 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 84434-11:
127 % 10 = 7
So 84434-11-7 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017


1.1 GHS Product identifier

Product name Ethyl Phenyl(2,4,6-trimethylbenzoyl)phosphinate

1.2 Other means of identification

Product number -
Other names Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:84434-11-7 SDS

84434-11-7Relevant articles and documents

High performance liquid phase continuous automatic production and co-production technology of organic phosphine compound


Paragraph 0077-0078, (2021/05/12)

The invention relates to the field of photocuring functional new material chemicals, and discloses a high performance liquid phase streamline type continuous automatic production technology of an acylphosphine oxide organic phosphine compound for the first time, which not only can produce a single specific target product, but also can co-produce a product mixture of two or more than two of the products of the type. The process technology has outstanding low-cost economic competitiveness and environment-friendly characteristics for large-scale manufacturing of target products. The target product comprises sym-trimethylbenzoyl diphenyl phosphine oxide (also known as 2, 4, 6-trimethylbenzoyl diphenyl phosphine oxide, trade name TPO), sym-trimethylbenzoyl phenyl ethyl phosphonate (trade name TPO-L) and structural analogues thereof, and a mixture of the sym-trimethylbenzoyl diphenyl phosphine oxide and the sym-trimethylbenzoyl phenyl ethyl phosphonate. The organic phosphine compound is an olefinic bond-containing (C=C) unsaturated radiation polymerization system photoinitiator and/or flame retardant and the like with wide application.

Chlorosilane-Catalyzed Coupling of Hydrogen Phosphine Oxides with Acyl Chlorides Generating Acylphosphine Oxides

Zhang, Jian-Qiu,Han, Li-Biao

supporting information, p. 4633 - 4637 (2020/06/23)

We report a new method for the synthesis of acylphosphine oxides by the direct coupling of hydrogen phosphine oxides and acyl chlorides mediated by chlorosilanes. This new protocol is greener and safer, because it precludes the generation of volatile haloalkanes and the use of oxidants employed in the conventional methods. Moreover, moisture-unstable acylphosphine oxides that are difficult to prepare via the conventional methods can be generated using this new method.

Preparation method for high-purity ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate


Paragraph 0012; 0019; 0020; 0021; 0022; 0023; 0024-0026, (2017/10/13)

The invention discloses a preparation method for high-purity ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate. The preparation method comprises the following concrete steps: reacting phenylphosphinate with aromatic aldehyde so as to prepare an intermediate, subjecting the intermediate to catalytic oxidation so as to obtain benzoylphenylphosphinic acid and subjecting benzoylphenylphosphinic acid and diethyl sulfate to an ethylation reaction so as to obtain ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate. According to the invention, raw materials have high quality and stable properties; by-produced impurities produced during synthesis of ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate can be removed through neutralization, and ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate with a purity of higher than 99.0%, which meets market demands for the high-purity photoinitiator ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate.

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