Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
[CAS# 84434-11-7]

Identification

• Classification: Catalysts and additives >> UV absorber
• Name: Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
• Synonyms: Phenyl(2,4,6-trimethylbenzoyl)phosphinic acid ethyl ester; 2,4,6-Trimethylbenzoylethoxyphenylphosphine oxide
• Molecular Formula: C₁₈H₂₁O₃P
• Molecular Weight: 316.33
• CAS Registry Number: 84434-11-7
• EC Number: 282-810-6
• SMILES: CCOP(=O)(C1=CC=CC=C1)C(=O)C2=C(C=C(C=C2C)C)C

Properties

• Density: 1.13 g/mL
• Flash Point: 184 ºC

Safety Data

• Hazard Symbols: GHS07;GHS09 Warning
• Hazard Statements: H317-H411
• Precautionary Statements: P261-P272-P273-P280-P302+P352-P321-P333+P317-P362+P364-P391-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Skin sensitization	Skin Sens.	1B	H317
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Skin sensitization	Skin Sens.	1	H317
Skin irritation	Skin Irrit.	2	H315
Serious eye damage	Eye Dam.	1	H318
Reproductive toxicity	Repr.	2	H361
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413
Acute toxicity	Acute Tox.	4	H302
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400

Discovory and Applicatios

Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is a notable chemical compound with significant implications in the field of polymer chemistry and materials science. This compound, characterized by its distinct chemical structure, is primarily used as a photoinitiator in polymerization processes.

The discovery of ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate stems from the need for effective photoinitiators in UV-curable systems. Photoinitiators are crucial in the polymerization of monomers under ultraviolet (UV) light, enabling the formation of polymers that are used in a variety of applications. This compound was developed to enhance the efficiency and control of polymerization processes, particularly in high-performance coatings and adhesives.

The chemical structure of ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate includes a phosphinate group attached to a phenyl ring, as well as a 2,4,6-trimethylbenzoyl moiety. This structure allows the compound to absorb UV light and generate reactive species that initiate the polymerization of acrylates and other monomers. The ethyl group further contributes to the compound's solubility and compatibility with various formulations.

In practical applications, ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is used in the formulation of UV-curable coatings, inks, and adhesives. Its role as a photoinitiator is crucial in achieving rapid and efficient curing under UV light, which is essential for applications requiring quick processing and high-quality finishes. For instance, in the coatings industry, this compound helps produce durable and resistant coatings that adhere well to different substrates and provide excellent protection against environmental factors.

The compound's efficiency in initiating polymerization reactions makes it valuable in the production of specialty materials that demand precise control over the polymerization process. Its application extends to various industries, including automotive, electronics, and packaging, where high-performance materials are essential. The ability to fine-tune the properties of the final product by adjusting the concentration of this photoinitiator further enhances its utility in diverse applications.

Overall, ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate is an important compound in polymer chemistry, particularly for its role as a photoinitiator in UV-curable systems. Its development has advanced the capabilities of polymerization processes, leading to improved performance and versatility in a range of industrial applications.