Description

2-Isopropylthioxanthone is a high-performance photoinitiator belonging to the thioxanthone chemical class. Its primary value lies in its exceptional efficiency in generating free radicals upon exposure to UV light, which is critical for initiating and accelerating polymerization reactions. This compound is essential for manufacturers in the coatings, inks, and adhesives industries seeking to enhance production speed and product durability. Its specific structure offers advantages in solubility and reactivity within various resin systems.

Application

• UV-Curable Coatings: A key photoinitiator for clear and pigmented wood, plastic, and metal coatings, providing fast cure speeds and excellent surface finish.
• Printing Inks: Used in UV-curable inks for packaging, labels, and commercial printing to ensure rapid drying and high print quality.
• Adhesives & Sealants: Facilitates the instant curing of UV-reactive adhesives used in electronics assembly, medical devices, and optical bonding.
• Photopolymer Printing Plates: Acts as a sensitizer in the production of flexographic and letterpress plates, enabling precise image reproduction.
• Dental Composites: Employed in light-curable dental restorative materials for quick and robust setting.
• Electronics: Used in the UV curing of conformal coatings, solder masks, and encapsulants for circuit boards and components.
• 3D Printing (Stereolithography): Serves as a photoinitiator in resin formulations for vat polymerization additive manufacturing.

Basic Information

Product Name	2-Isopropylthioxanthone
CAS No.	5495-84-1
Molecular Formula	C16H14OS
Molecular Weight	254.35 g/mol
Synonyms	2-Propan-2-ylthioxanthen-9-one; ITX; Isopropylthioxanthone; 2,4-Diisopropylthioxanthone (common trade mixture name); Quantacure ITX; 9H-Thioxanthen-9-one, 2-(1-methylethyl)-; 2-(Propan-2-yl)thioxanthen-9-one
EINECS	226-842-2

Quality Control

Our 2-Isopropylthioxanthone is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for assay and purity, to ensure it meets the high standards required for industrial photoinitiators. We provide full traceability and a Certificate of Analysis (COA) with each shipment, detailing key parameters such as purity, melting point, and UV absorbance. Our quality commitment ensures batch-to-batch consistency for your critical 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, sparks, and open flame. Due to its light-sensitive nature, handling and packaging should be conducted under yellow light or in darkness to prevent premature degradation.

Specification

Item	Specification
Appearance	Light yellow to yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	68 - 72 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
UV Absorption	Conforms

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