Description

4-Methyl-9H-Thioxanthen-9-One is a high-purity organic compound belonging to the thioxanthone class, serving as a critical photoinitiator and intermediate in advanced manufacturing processes. Its value lies in its ability to efficiently generate free radicals upon exposure to UV light, initiating polymerization reactions with high efficiency and stability. This makes it an essential component for formulators and manufacturers in the photopolymer, advanced coatings, and specialty chemical synthesis sectors seeking reliable performance and consistent quality.

Application

• UV-Curable Inks and Coatings: Acts as a key photoinitiator for rapid curing in printing inks, wood coatings, and industrial finishes.
• Photopolymer Printing Plates: Used in the production of flexographic and letterpress plates for packaging and publishing.
• Adhesives and Sealants: Facilitates fast, on-demand curing in UV-curable adhesive formulations.
• Electronics Manufacturing: Employed in photoresists and solder masks for printed circuit board (PCB) fabrication.
• 3D Printing (Stereolithography): Serves as a photoinitiator in resin-based additive manufacturing systems.
• Organic Synthesis: Functions as a versatile building block for synthesizing more complex heterocyclic compounds and pharmaceuticals.

Basic Information

Product Name	4-Methyl-9H-Thioxanthen-9-One
CAS No.	87548-97-8
Molecular Formula	C₁₄H₁₀OS
Molecular Weight	226.29 g/mol
Synonyms	4-Methylthioxanthone; 4-Methyl-9H-thioxanthen-9-one; 4-Methyl-TX; 4-MTX; 9H-Thioxanthen-9-one, 4-methyl-; 4-Methylthioxanthen-9-one; Photoinitiator 4-MTX
EINECS	Contact for details

Quality Control

Our 4-Methyl-9H-Thioxanthen-9-One is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including HPLC for assay and related substances, to meet exacting customer specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and physical parameters is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its light-sensitive and easily oxidized nature, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term stability and to minimize degradation.

Specification

Item	Specification
Appearance	Yellow to pale yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.5%
Melting Point	168°C - 172°C
Loss on Drying	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 1.0%

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