Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
- Createtime： 2026-04-14
- Updatetime： 2026-04-15
Product Details
| useage |
Industrial use
|
| deliveryInfo |
|
| appearance |
liquid
|
| Molecular Weight |
316.33
|
| aliasen |
|
| supplyCapacity |
50000MT/Month
|
| harbor |
Qingdao,China
|
| minorder |
1KG
|
| Appearance |
Pale yellow clear liquid
|
Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Basic Information
Product Name: Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate
Alias: TPO-L, Omnirad TPO-L, 2,4,6-Trimethylbenzoylphenylphosphinic acid ethyl ester
CAS No: 84434-11-7
Molecular Formula: C18H21O3P
Molecular Weight: 316.33
Classification:
Type I free radical UV photoinitiator (liquid, low yellowing)
Physical & Chemical Properties
Appearance: Pale yellow clear liquid
Density: 1.1±0.1 g/cm3 (20°C)
Boiling Point: 456.0±55.0 °C (760 mmHg)
Flash Point: 242.9±51.8 °C
Melting Point: 144.5–147 °C
Solubility: Miscible with most acrylic monomers, resins, organic solvents; insoluble in water
Stability: Stable under normal conditions; avoid strong acids, bases, and excessive heat
UV Absorption: λmax ~380 nm (effective for UVA/UVB curing)
Specification Table
| Item | Specification | Unit | Remarks |
| Product Name | Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate | - | Photoinitiator grade |
| CAS No | 84434-11-7 | - | TPO-L |
| Appearance | Pale yellow clear liquid | - | No sediment |
| Purity | ≥99.0 | % | HPLC |
| Moisture | ≤0.1 | % | Karl Fischer |
| Color (APHA) | ≤150 | - | Visual |
| Viscosity | 500–800 | mPa·s (25°C) | Brookfield |
Main Uses
- UV-curable coatings: Wood, plastic, metal, automotive, and white/low-yellowing topcoats
- Printing inks: Screen, offset, flexo, food/pharmaceutical packaging inks
- Adhesives: UV-curable adhesives for glass, plastic, metal bonding
- 3D printing: Photopolymer resins for SLA/DLP printing
- Electronic materials: Photoresists, solder masks, display coatings
Key Advantages vs. TPO
- Liquid form: Easier handling and dosing than solid TPO
- Lower yellowing: Better for white/transparent systems
- Higher reactivity: Faster surface and through-cure
- Good compatibility: Wide solubility in resins/monomers
Safety & Storage
- Risk Phrases: May cause skin/eye irritation; avoid inhalation
- Storage: Sealed, cool (≤25°C), dry place; away from direct sunlight
- Packaging: 20 kg drum / 25 kg drum
