TCI H0617 1-Hydroxycyclohexyl Phenyl Ketone is a free-radical photoinitiator belonging to the aromatic α-hydroxyketone family, a class well established in ultraviolet curing technology. When the molecule absorbs UV light, it undergoes bond cleavage at the carbonyl side, generating a pair of radicals that immediately initiate the polymerization of acrylate and methacrylate monomers. In materials science and polymer laboratories, this compound serves as a key component in formulations for coatings, inks, adhesives, and three-dimensional printing resins that harden within seconds, without requiring heating or evaporating solvents.
The properties that make this photoinitiator such a widely chosen option are its high initiation efficiency, its low tendency to yellow in the cured film, and its good solubility across a broad range of acrylate monomers and oligomers. As a Type I photoinitiator, it works through direct cleavage and therefore does not require an amine co-initiator, which simplifies formulation work and reduces problems with odor and color change. It is supplied as a white crystalline solid that is easy to weigh out and dissolve, and it remains stable when stored protected from light.
In Indonesian laboratories, this reagent is typically handled within polymer chemistry, coatings, and materials research groups working on UV-curable systems. Its absorption character in the UV region makes it compatible with common laboratory curing lamps, so researchers can prepare trial formulations at bench scale before moving to larger runs. University research laboratories, industrial R&D units, and quality control laboratories developing coating and printing formulations all make regular use of this class of photoinitiator.
- UV-curable coating development: the high initiation efficiency and low yellowing tendency allow researchers to formulate clear protective films that cure in seconds under ultraviolet lamps.
- Printing ink formulation: as a Type I photoinitiator it cleaves directly without an amine co-initiator, avoiding the odor and discoloration problems that complicate ink development work.
- Photopolymer resin for three-dimensional printing: rapid radical generation upon UV absorption supports layer-by-layer hardening of acrylate resin systems without any thermal curing step.
- Adhesive and bonding research: good solubility in acrylate monomers and oligomers lets formulators incorporate it uniformly into adhesive systems that must set quickly on demand.
- Fundamental photopolymerization studies: its well-characterized α-hydroxyketone cleavage mechanism makes it a reliable reference initiator for investigating radical polymerization kinetics of acrylate and methacrylate monomers.
| Brand | TCI (Tokyo Chemical Industry) |
|---|---|
| CAS number | 947-19-3 |
| Molecular formula | — |
| Purity | — |
| Category | Materials Science > Polymer/Macromolecule Reagents > Polymerization Reagents |
| Pack sizes | available in standard laboratory catalog pack sizes; please confirm the packaging option required |
| Physical form | white crystalline solid |
| Storage | store protected from light; keep containers closed when not in use |
Store this photoinitiator in its original tightly closed container, protected from light, since exposure to ultraviolet or strong ambient light can prematurely activate the compound and reduce its performance in formulation work. Amber glass or opaque containers are suitable for aliquots and working solutions. Keep the material away from ignition sources and incompatible substances, and weigh it out in a well-ventilated area or a fume hood to avoid dust inhalation. Laboratory personnel should wear gloves, safety goggles, and a lab coat when handling the solid, and should avoid direct skin and eye contact. Close containers promptly after use to limit light and moisture exposure, and follow the safety data sheet supplied with the product for full handling guidance.
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