SINOCURE® CMTX (2-Carboxymethoxythioxanthone) is an acid-functionalized thioxanthone photoinitiator belonging to the Norrish Type II (hydrogen-abstracting) class. The introduction of a carboxymethoxy group (—OCH₂COOH) into its molecular structure gives it superior solubility in alkaline aqueous systems, overcoming the poor water solubility and crystallization tendency of traditional thioxanthone photoinitiators. Specially designed for UV-LED curing systems, it performs exceptionally well in waterborne UV inkjet inks and coatings.
SINOCURE® CMTX
(2-Carboxymethoxythioxanthone, Norrish Type II Photoinitiator)
Chemical Name: 2-Carboxymethoxythioxanthone
CAS No.: 84434-05-9
MF: C15H10O4S
MW： 286.3
Molecular structure：
SINOCURE® CMTX (2-Carboxymethoxythioxanthone) is an acid-functionalized thioxanthone photoinitiator belonging to the Norrish Type II (hydrogen-abstracting) class. The introduction of a carboxymethoxy group (—OCH₂COOH) into its molecular structure gives it superior solubility in alkaline aqueous systems, overcoming the poor water solubility and crystallization tendency of traditional thioxanthone photoinitiators. Specially designed for UV-LED curing systems, it performs exceptionally well in waterborne UV inkjet inks and coatings.
Appearance | Light yellow powder |
Assay ,% | ≥ 95.0 |
Moisture ,% | ≤ 0.5 |
Isomers ,% | ≤ 1.0 |
Melting Point | 100 – 104 °C |
Absorption Peak | 395 nm |
Long Absorption Wavelength
Low Migration & Low Odor
Excellent Aqueous Solubility
High Photocuring Reactivity
Recommended Systems: Alkaline aqueous systems,UV inkjet inks, waterborne UV coatings, offset printing inks, flexographic inks, screen printing inks, and UV overprint varnishes cured by 395 nm UV-LED or mercury lamps.
Synergistic Formulation: Recommended for use in combination with tertiary amine synergists (e.g., amine acrylates, SINOCURE® EDB) to overcome oxygen inhibition and achieve optimum surface and depth cure.
● 20kgs/carton
Being kept in dry, clean warehouse with well ventilation.
Avoid exposing to light and heating.
Protecting the product from leakage, rain and insolation during transportation.
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