Specialty Additives Available — Bulk Only

Photoinitiator 184 (1-Hydroxycyclohexyl Phenyl Ketone)

HCPK
CAS 947-19-3 · Formula C13H16O2 · MW 204.26 g/mol

Type I alpha-hydroxyketone photoinitiator giving low-yellowing cure of clear UV coatings, lacquers and overprint varnish (Coatings & Construction) Standard initiator for clear UV/UV-LED inks and high-gloss line coatings (Industrial Manufacturing) Cures clear UV-curable adhesives, hardcoats and plastics (Plastics & Polymers)

Request SDS
CAS Number
947-19-3
Formula
C13H16O2
Molecular Weight
204.26 g/mol
Material Family
Specialty Additives
At a Glance
Material Family
Specialty Additives
Record Type
UVCB
Primary Role
Crosslinking / Curing
Functional Roles
Applications & Use Cases
  • Type I alpha-hydroxyketone photoinitiator giving low-yellowing cure of clear UV coatings, lacquers and overprint varnish (Coatings & Construction)
  • Standard initiator for clear UV/UV-LED inks and high-gloss line coatings (Industrial Manufacturing)
  • Cures clear UV-curable adhesives, hardcoats and plastics (Plastics & Polymers)
Physical Properties
appearance
White to off-white crystalline powder or flakes
melting_point
45-49 C
density
1.06-1.10 g/cm3
flash_point
>100 C
water_solubility
Slightly soluble in water (~3-4 g/L at 20 C)
uv_absorption_max
lambda_max ~246, 280, 333 nm
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

Request SDS →
Chemical Identity
CAS Number
947-19-3
Molecular Formula
C13H16O2
Molecular Weight
204.26 g/mol
IUPAC Name
(1-hydroxycyclohexyl)-phenylmethanone
PubChem CID
InChI Key
QNODIIQQMGDSEF-UHFFFAOYSA-N
XLogP
2.6
Synonyms & Trade Names
1-Hydroxycyclohexyl phenyl ketone 1-Benzoylcyclohexanol (1-Hydroxycyclohexyl)(phenyl)methanone Hydroxycyclohexyl phenyl ketone Photoinitiator 184 Comparable to Irgacure 184 Comparable to Omnirad 184
Full Description

Type I alpha-hydroxyketone photoinitiator giving low-yellowing cure of clear UV coatings, lacquers and overprint varnish (Coatings & Construction) Standard initiator for clear UV/UV-LED inks and high-gloss line coatings (Industrial Manufacturing) Cures clear UV-curable adhesives, hardcoats and plastics (Plastics & Polymers)

Frequently Asked Questions

Is Photoinitiator 184 an equivalent to Irgacure 184?

Photoinitiator 184 is the generic Type I/II photoinitiator commonly sold as Irgacure 184. RawSource supplies an independent equivalent — verified to your specification and Certificate of Analysis — and is not affiliated with, authorized by, or endorsed by IGM Resins.

What is 1-Hydroxycyclohexyl phenyl ketone (184) (CAS 947-19-3)?

1-Hydroxycyclohexyl phenyl ketone (184) (CAS 947-19-3) is a crosslinking / curing agent supplied by RawSource in bulk. Type I alpha-hydroxyketone photoinitiator giving low-yellowing cure of clear UV coatings, lacquers and overprint varnish (Coatings & Construction)

What is the molecular formula and weight of 1-Hydroxycyclohexyl phenyl ketone (184)?

Molecular formula C13H16O2, molecular weight 204.26 g/mol. IUPAC name: (1-hydroxycyclohexyl)-phenylmethanone

Is 1-Hydroxycyclohexyl phenyl ketone (184) hazardous?

A full Safety Data Sheet (SDS) is available on request and supplied with every shipment; hazard classification is confirmed against the SDS for the grade you order

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.