369 (CAS 119313-12-1)
| CAS No. | 119313-12-1 |
|---|---|
| Alias | Benzyl-2-(dimethylamino)-1-[4-(4-morpholinyl)phenyl]-butanone |
| Category | Photoinitiators |
| Purity | ≥98.00% |
| Packaging | 20kg/carton |
369 is a high-performance free radical photoinitiator with high initiating activity and excellent deep curing performance. It features long absorption wavelengths of 233 nm and 324 nm, making it especially suitable for colored UV-curable systems. It is commonly used as a direct substitute for 907 and works particularly well when combined with thioxanthone photoinitiators.
Equivalent grades. The same substance is sold by other manufacturers as Omnirad 369, Irgacure 369, Genocure BDMM, Speedcure BDMB, Doublecure 369, Chivacure 169. It is the same CAS number (119313-12-1) and the same chemistry, so a formulation written around one of those grades transfers directly.
Introduction
369 is a high-activity amino ketone built for coloured systems. Its absorption runs to 324 nm, which lets it work under pigment where a surface-acting initiator cannot reach, and it delivers the deep cure that thick or opaque films need.
It is commonly specified as a direct substitute for 907, and the two share a similar role in the formulation. When combined with a thioxanthone such as ITX or DETX, 369 covers the depth while the thioxanthone handles the light that gets through.
Physical & Chemical Properties
Light yellow powder. Molecular formula C23H30N2O2, molecular weight 366.51, purity ≥98.00%, melting range 110.0–123.0 °C, loss on drying ≤0.30%. Absorption maxima at 233 nm and 324 nm.
Applications
Recommended at 3–5%. Best suited to coloured UV-curable systems and to applications where the film is thick enough that surface-only initiation leaves the lower layers wet.
Regulatory status
369 has been on the REACH Candidate List since 16 January 2020 and carries a harmonised Repr. 1B classification with an Aquatic Acute 1 entry. That is a longer regulatory history than TPO, which is often assumed to be the most constrained product in this range. Note that 369 is nevertheless positively listed in Swiss Annex 10, at 0.15 mg/kg, because CMR status bars a substance from the non-listed route and the functional-barrier exemption, not from being listed. In Germany it is absent from Anlage 14 category V. If your market is Germany or your end use is food contact, read the position before you specify.
We also supply grades intended as 907 substitutes that avoid the reproductive-toxicity classification. Ask us for the comparison if you are reviewing this part of your formulation.
Handling & Storage
Store sealed, cool, dry and dark. One year shelf life from production. Consult the SDS.
Packaging
20 kg cartons. COA per batch, SDS in English, samples available.
Applications & Industries
Coatings & Paints
Metal driers (cobalt, manganese, zirconium octoate, naphthenates) and photoinitiators for coatings, paints, varnishes and industrial finishes — with COA & MSDS per batch.
UV Curing & Printing Inks
Free radical photoinitiators for UV-curable inks, coatings, adhesives and 3D printing — 1173, 184, 369, 907, ITX, DETX, TPO/TPO-L and liquid blends, QC-tested per batch.
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Frequently Asked Questions
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MOQ depends on the product and specification. For most chemicals we can supply from 1 kg sample orders up to full container loads (FCL). Contact us with the product name and CAS number for a specific MOQ quotation.
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