- ▸ Type I alpha-aminoketone photoinitiator for low-migration cure of pigmented UV coatings (Coatings & Construction)
- ▸ Used in UV inks and low-odor/low-migration print systems for packaging (Industrial Manufacturing)
- ▸ Initiates cure of pigmented UV-curable plastics and adhesives (Plastics & Polymers)
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.
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This biphenyl alpha-aminoketone is a high-activity Type I photoinitiator for pigmented systems — the biphenyl analogue of 907. Its extended conjugation red-shifts absorption to cure pigmented and thicker films efficiently. Identity: CAS 94576-68-8.
What it is
1-(Biphenyl-4-yl)-2-methyl-2-morpholinopropan-1-one (CAS 94576-68-8) is a morpholino-aminoketone with a biphenyl chromophore, a pale solid. The biphenyl group extends absorption to longer UV than 907.
How it cures
A Type I alpha-aminoketone that cleaves efficiently under UV; its long-UV absorption (from the biphenyl) drives cure through pigment and in thicker films. Like other aminoketones it is high-activity and is balanced for yellowing in clears.
Applications
Used in pigmented and white UV coatings and inks, solder masks and thicker films, often with a thioxanthone (ITX/DETX) and amine synergist, and with BAPO for deep pigmented cure. Related: 907 and 369.
Forms, grades and handling
It is supplied as a pale powder. Photoinitiators are light-sensitive — store cool, dry and dark, away from light and ignition sources. Handle per the current Safety Data Sheet (SDS); each lot ships with a Certificate of Analysis (CoA) and Technical Data Sheet (TDS).
Bulk supply and RFQ
RawSource sources 1- direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your lamp (mercury or LED wavelength), system (clear or pigmented) and cure target, and we will quote the right grade. Compare the full range and selection logic in the photoinitiators guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / type | Photoinitiator (Type I, alpha-aminoketone) |
| Photoinitiator type | Type I (cleavage), alpha-aminoketone |
| Absorption | Long UV — for pigmented systems |
| CAS Number | 94576-68-8 |
| Molecular Formula | C20H23NO2 |
| Molecular Weight | 309.4 g/mol |
| Handling | Light-sensitive; refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU): Not determined from public registry
TSCA Inventory flag PMN: a commenced PMN (premanufacture notice) substance (EPA flag legend).
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is 1-(biphenyl-4-yl)-2-methyl-2-morpholinopropan-1-one used for?
It is a high-activity Type I alpha-aminoketone (CAS 94576-68-8), the biphenyl analogue of 907, used to cure pigmented and white UV coatings, inks and thicker films, often with a thioxanthone and amine synergist.
How does it compare to 907?
Both are morpholino alpha-aminoketones for pigmented systems; the biphenyl version red-shifts absorption to longer UV, which can improve cure through pigment relative to 907.
How is bulk this aminoketone supplied and quoted?
RawSource supplies this aminoketone in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your target quantity.
What is the REACH and TSCA regulatory status of 1-(Biphenyl-4-yl)-2-methyl-2-morpholinopropan-1-one?
1-(Biphenyl-4-yl)-2-methyl-2-morpholinopropan-1-one (CAS 94576-68-8) is listed as Active on the U.S. EPA TSCA Inventory; its REACH registration status is not determined from the public ECHA registry.