NPI-20400 (CAS 2020359-04-8)
| CAS No. | 2020359-04-8 |
|---|---|
| Alias | H-芴-2-基)-2-甲基-2-吗啉-4-基-丙烷-1-酮 1-(9,9-Dibutyl-9H-fluoren-2-yl)-2-methyl-2-morpholin-4-yl-propan-1-one |
| Category | Photoinitiators |
| Purity | ≥98.50% |
| Packaging | 20kg/drum |
NPI-20400 is a general-purpose free radical photoinitiator with high initiating activity and excellent deep curing performance. It offers non-reproductive toxic, low odor, low migration, good solubility, and excellent thermal stability, making it a suitable substitute for 907. It is particularly effective in colored systems when used in combination with thioxanthone photoinitiators.
Introduction
NPI-20400 is a fluorene-based amino ketone built as a 907 substitute, and the design brief is visible in its structure. The dibutylfluorene group is bulky, and bulk is what keeps a molecule from migrating: it diffuses through a cured film far more slowly than a small one. The morpholine ketone on the other end does the initiating work.
The other half of the brief is that it carries no reproductive-toxicity classification, which is the property that makes 907 increasingly awkward to specify. That is not a marketing position. It is a difference in hazard classification, and it changes what your SDS has to say and which routes your formulation can use.
Physical & Chemical Properties
Off-white to light yellow powder. Chemical name 1-(9,9-dibutyl-9H-fluoren-2-yl)-2-methyl-2-morpholin-4-yl-propan-1-one. Molecular formula C29H39NO2, molecular weight 433.64, purity ≥98.50%, melting range 63.0–73.0 °C, loss on drying ≤0.50%. Absorption maximum at 313 nm.
Applications
Recommended at 3–5%, which is roughly 1.3 to 1.5 times the loading you would use for 907. That dosing factor is worth planning for: a direct substitution at the same percentage will under-cure, and the fix is more initiator rather than a different product. Particularly effective in coloured systems combined with a thioxanthone.
Regulatory status
NPI-20400 carries no reproductive-toxicity classification and has no harmonised classification under CLP. It is not on the REACH Candidate List and is not listed in Swiss Annex 10. Migration performance depends on your film weight, substrate and cure conditions, so it has to be measured for your construction rather than assumed from the chemistry.
Handling & Storage
Store sealed, cool, dry and dark. 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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