Description

1-Methylethyl Methyl(2,4,6-Trimethylbenzoyl)Phosphinate is a highly efficient, low-yellowing photoinitiator used in UV-curable systems. Its core value lies in its exceptional reactivity and solubility, enabling rapid and thorough curing of coatings, inks, and adhesives under UV light. This compound is essential for manufacturers in the industrial coatings, graphic arts, and electronics sectors who require high-performance, durable finishes with minimal energy consumption.

Application

• UV-Curable Coatings: A key component in clear coats, wood finishes, and metal coatings for automotive, furniture, and industrial applications.
• Printing Inks: Used in flexographic, screen, and offset inks to achieve fast curing speeds and excellent surface adhesion.
• Electronics: Employed in the photopolymerization of solder masks, conformal coatings, and optical fiber coatings.
• Adhesives & Sealants: Facilitates instant curing in pressure-sensitive adhesives (PSA) and assembly glues.
• 3D Printing (Stereolithography): Acts as a photoinitiator in resin formulations for rapid prototyping and additive manufacturing.
• Dental Composites: Used in light-curable dental restorative materials for quick setting and high strength.

Basic Information

Product Name	1-Methylethyl Methyl(2,4,6-Trimethylbenzoyl)Phosphinate
CAS No.	84434-10-6
Molecular Formula	C14H21O3P
Molecular Weight	268.29 g/mol
Synonyms	Isopropyl Methyl(2,4,6-Trimethylbenzoyl)Phosphinate; Methyl(2,4,6-Trimethylbenzoyl) Phenylphosphinate; (2,4,6-Trimethylbenzoyl) Diphenylphosphine Oxide (related acylphosphine oxide class); TPO-L (common trade name); Photoinitiator TPO-L; APO-based photoinitiator; UV Photoinitiator 84434-10-6; Light Curing Agent 84434-10-6
EINECS	Contact for details

Quality Control

Our 1-Methylethyl Methyl(2,4,6-Trimethylbenzoyl)Phosphinate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for photoinitiator performance. A Certificate of Analysis (COA) detailing all quality parameters is provided with every shipment to guarantee supply reliability and batch-to-batch consistency for your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat and incompatible materials. Due to its light-sensitive nature, containers should be kept sealed and opened under subdued lighting conditions when handling.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Melting Point	88 - 92 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.