NPI-201 (CAS 119313-12-1)
| CAS No. | 119313-12-1 |
|---|---|
| Alias | Benzyl-2-(dimethylamino)-1-[4-(4-morpholinyl)phenyl]-butanone |
| Category | Photoinitiators |
| Purity | ≥99.00% (HPLC) |
| Packaging | 20kg/carton |
NPI-201 is a high-activity free radical photoinitiator with long absorption wavelengths (233 nm and 324 nm) and excellent deep-curing performance. It is an electronic-grade product, often used as a higher-specification substitute for 369 in electronic circuit materials, primarily for packaging and bonding applications. It can also be combined with other photoinitiators, especially thioxanthones, for effective curing of colored systems.
Introduction
NPI-201 is an electronic-grade amino ketone produced to a tighter specification than the standard 369 grade, and it is aimed specifically at packaging and bonding in electronic circuit materials rather than at coatings.
The tighter specification is the reason to pay for it. Purity is held at 99.00% or above by HPLC against 98.00% for the standard grade, and for electronic applications the difference is not cosmetic: ionic impurities and batch-to-batch variation matter more in a circuit material than they do in a wood coating.
Physical & Chemical Properties
Light yellow powder. Chemical name 2-benzyl-2-(dimethylamino)-1-[4-(4-morpholinyl)phenyl]-1-butanone. Molecular formula C23H30N2O2, molecular weight 366.51, purity ≥99.00% by HPLC, melting range 110.0–123.0 °C, loss on drying ≤0.30%. Absorption maxima at 233 nm and 324 nm.
Applications
Recommended at 1–3% for electronic circuit packaging and bonding, where the standard grade is typically dosed at 3–5%. It can be combined with thioxanthone photoinitiators for curing coloured systems.
Regulatory status
This is the part to read carefully. NPI-201 is the same substance as 369: same CAS number, 119313-12-1. It has been on the REACH Candidate List since 16 January 2020 and carries a harmonised Repr. 1B classification. A house grade name does not change any of that.
It is positively listed in Swiss Annex 10 at 0.15 mg/kg. It is absent from category V of the German Anlage 14, and because of the CMR gate it cannot use the German non-listed route either. If you are specifying NPI-201 into a European application, work from 369's regulatory position, because that is what it is.
Handling & Storage
Store sealed, cool, dry and dark. Consult the SDS.
Packaging
Packaging as agreed at order. COA per batch, SDS in English.
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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