Description

2-(tert-Butyl)-9H-Thioxanthen-9-One is a specialized organic compound belonging to the thioxanthone class, valued for its role as a high-performance photoinitiator in UV-curable systems. Its core value proposition lies in its ability to efficiently generate free radicals upon UV light exposure, initiating rapid polymerization for high-quality, durable surface coatings. This product is essential for industrial manufacturers seeking to enhance production speed and finish quality in sectors such as inks, coatings, adhesives, and advanced photoresists.

Application

• UV-Curable Printing Inks: A key photoinitiator for fast-curing, high-gloss, and abrasion-resistant inks used in packaging, labels, and commercial printing.
• Industrial Wood & Furniture Coatings: Enables rapid curing of clear and pigmented UV coatings, providing excellent surface hardness, chemical resistance, and a superior finish.
• Optical Fiber Coatings: Used in the production of primary and secondary coatings to protect glass fibers, ensuring durability and signal integrity.
• Electronics & Photoresists: Acts as a photoactive component in photopolymer formulations for printed circuit boards (PCBs) and microelectronics.
• Adhesives & Sealants: Facilitates instant curing in UV-curable adhesives for assembly, medical device, and optical bonding applications.
• 3D Printing (Stereolithography): Serves as a photoinitiator in resin formulations for vat polymerization, contributing to precise and rapid part fabrication.

Basic Information

Product Name	2-(tert-Butyl)-9H-Thioxanthen-9-One
CAS No.	5495-87-4
Molecular Formula	C₁₇H₁₆OS
Molecular Weight	268.37 g/mol
Synonyms	2-tert-Butylthioxanthone; 2-(1,1-Dimethylethyl)thioxanthen-9-one; 2-Tert-Butyl-9H-Thioxanthen-9-One; 2-t-Butylthioxanthone; 2-TBTX; BTX; Speedcure BMS; Irgacure 2; Genocure BTO; Omnirad BMS
EINECS	226-841-3

Quality Control

Our 2-(tert-Butyl)-9H-Thioxanthen-9-One is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, performance, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with every shipment to guarantee traceability and compliance with your formulation requirements.

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 sources and incompatible materials. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	Light yellow to yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Melting Point	96 - 100 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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