10-Hydroxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)
CAS: 36240-31-0
Category: Organic Intermediates
| Purity | Industrial Grade ≥98%; High Purity Grade ≥99%; Electronic/Polymer Grade ≥99.5% |
| Molecular Formula | C12H9O3P |
| Molecular Weight | 232.17 |
| Appearance | White to off-white crystalline powder or solid |
| Packaging | 25 kg fiber drum with polyethylene inner bag; 500 g, 1 kg, or 5 kg aluminum foil bags for laboratory and specialty applications |
| Testing Indicators | Appearance — Visual inspection; Identification — FTIR spectroscopy (P–O and P–H characteristic absorption); Purity — HPLC or GC analysis; Melting point — Capillary melting point method (typically around 118–122°C); Phosphorus content — ICP-OES or colorimetric phosphorus determination; Moisture — Karl Fischer titration; Residual solvents — GC analysis; Ash content — Gravimetric method. |
| Storage Notes | Store in a cool, dry, and well-ventilated area. Keep the container tightly closed and protected from moisture, heat, and direct sunlight. Avoid contact with strong oxidizing agents, strong acids, and strong bases. Store in sealed containers under normal atmospheric conditions. |
| Lead Time | 10 days |
10-Hydroxy-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is a phosphorus-containing organic intermediate widely used as a reactive flame retardant intermediate. It is mainly used in the synthesis of halogen-free flame retardants, epoxy resin modifiers, high-performance polymer additives, and phosphorus-containing polymers. It can react with epoxy groups, aldehydes, ketones, and unsaturated compounds to introduce phosphorus elements into polymer structures, improving flame resistance and thermal stability.