Description

2-Hydroxy-2-Methylpropiophenone is a high-purity photoinitiator widely recognized for its efficiency in UV-curable systems. Its primary value lies in its ability to generate free radicals upon exposure to UV light, initiating rapid polymerization for high-performance coatings and inks. This compound is essential for manufacturers in the printing, adhesives, and photoresist industries seeking reliable and fast-curing solutions.

Application

• UV-Curable Coatings & Inks: A key photoinitiator for wood, plastic, and metal coatings, as well as graphic arts and packaging inks.
• Adhesives & Sealants: Used in instant-cure UV adhesive formulations for electronics, medical devices, and optical bonding.
• Photopolymer Printing Plates: Critical component in the production of flexographic and letterpress plates.
• Dental Composites & Restoratives: Employed in light-cured dental materials for fast setting and high strength.
• Fiber Optic Coatings: Provides rapid curing for protective secondary coatings on optical fibers.
• 3D Printing (Stereolithography): Acts as a photoinitiator in resin-based additive manufacturing processes.
• Electronics Encapsulation: Used in potting compounds and conformal coatings that cure under UV light.

Basic Information

Product Name	2-Hydroxy-2-Methylpropiophenone
CAS No.	7473-98-5
Molecular Formula	C10H12O2
Molecular Weight	164.20 g/mol
Synonyms	2-Hydroxy-2-methyl-1-phenyl-1-propanone; HMPP; Darocur 1173; 1-Phenyl-2-hydroxy-2-methylpropan-1-one; α-Hydroxy-α,α-dimethylacetophenone; Benzoin methyl ether (related); Photoinitiator 1173; UV-1173
EINECS	231-272-0

Quality Control

Our 2-Hydroxy-2-Methylpropiophenone is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC and GC analysis, to ensure high purity and consistent performance as a photoinitiator. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from strong bases and incompatible organic solvents. Due to its light-sensitive nature, containers should be opaque or kept in light-resistant packaging.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (20°C)	1.533 - 1.537
Specific Gravity (20/20°C)	1.077 - 1.087

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