Omnirad 819
IGM Resins USA Inc. · Omnirad
Omnirad 819 is a versatile photoinitiator used for the radical polymerization of unsaturated resins upon UV light exposure. It is especially suitable for white pigmented formulations, the curing of glass-fiber-reinforced polyester/styrene systems, and clear coats for outdoor use in combination with light stabilizers. This photoinitiator is effective in thick-section curing and provides excellent curing performance with minimal yellowing.
- High curing efficiency
- Versatile applications
- Compatible with pigments
- Yellowing resistance
- Effective for thick films
Specifications
Identifiers
- Chemical name
- Phenyl bis(2,4,6-trimethylbenzoyl)-phosphine Oxide
- CAS number(s)
- 162881-26-7
- EC number
- 423-340-5
- Molecular formula
- C26H27O3P
- InChI key
- GUCYFKSBFREPBC-UHFFFAOYSA-N
- INCI name
- [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone
- Synonyms
- Bis(2,4,6-trimethylbenzoyl)phenylphosphine Oxide, (Phenylphosphoryl)bis(mesitylmethanone), Free Radical Photoinitiator - Type I
Technical specifications
Properties
| Property | Value | Unit |
|---|---|---|
| Physical State | Solid | - |
| Appearance | Powder, crystalline | - |
| Color | Yellow | - |
| Melting Point/Freezing Point | 131.4 | °C |
| Molecular Weight | 418.5 | g/mol |
| Vapor Pressure | <0 Pa (at 20°C) | - |
| Relative Density | 1.19 (at 21°C) | - |
| Water Solubility | <0.1 (at 20°C) | mg/l |
| Partition Coefficient | log Pow 5.8 (at 22°C) | - |
| Bulk Density | ~600 | kg/m³ |
Specifications
| Test Condition | Specification | Value | Unit | Test Method |
|---|---|---|---|---|
| - | Appearance | Yellow Powder (Pass) | - | Visual |
| - | Purity | ≥ 98.0 | % | HPLC Analysis |
| - | Melting Point | 127 - 133 | °C | - |
| at 500 nm, 5g/100ml Toluene | Transmittance | ≥ 98.0 | % | Spectrophotometer |
| 5g/100ml Toluene | Clarity of Solution | Pass | - | Visual |
| by weight, at 20 °C | Solubility in butyl acetate | ~ 6 | % | - |
| by weight, at 20 °C | Solubility in hexanediol diacrylate (HDDA) | ~ 5 | % | - |
| by weight, at 20 °C | Solubility in trimethylolpropane triacrylate (TMPTA) | ~ 5 | % | - |
| by weight, at 20 °C | Solubility in tripropyleneglycol diacrylate (TPGDA) | ~ 5 | % | - |
| - | Shelf Life | Durable for at least 36 months | - | - |
- Industries
- CASECeramics & glassElectronics & ElectricalFurniture & WoodPackaging & PrintingPaints & CoatingsPlastics & RubberPulp & Paper
- Product groups
- PhotoinitiatorsCoating Additives
- Applications
- UV-curable inksRadiation-curable coatingsCeramic compounds
- Functions
- PhotoinitiatorCuring agent
- Market segments
- Printing inks & coatingsProtective coatings
Documents
- Request a copy
Technical Data Sheet (TDS)
Specifications & performance data
- Request a copy
Safety Data Sheet (SDS)
Safety information & handling