Dimethyl Methylphosphonate (DMMP)
Dimethyl methylphosphonate (DMMP) is a highly efficient, water-miscible organophosphonate flame retardant used primarily in rigid polyurethane foam systems and as a fire suppression fluid component. With a phosphorus content of 25%, it delivers one of the highest phosphorus efficiencies among liquid phosphorus FR additives. DMMP acts predominantly in the gas phase, inhibiting radical chain reactions in the flame front, and is also used as a chemical warfare agent simulant in research and defense applications.
Technical Specifications
| appearance | Colorless transparent liquid |
| purity (GC, %) | ≥99 |
| water solubility | Miscible |
| boiling point (°C) | 181 |
| phosphorus content (%) | 25.0–25.5 |
| density (20°C, g/cm³) | 1.154–1.160 |
Applications
- Rigid polyurethane foam flame retardant for building insulation panels
- Flexible polyurethane foam flame retardant additive
- Fire-suppression total flooding system fluid component
- Polyisocyanurate (PIR) insulation foam flame retardant
- Research simulant for phosphonate-based chemical threat detection systems
Key Features
- Highest phosphorus content (25%) among common liquid phosphonate FRs for maximum efficiency
- Water-miscible liquid ensures uniform blending in polyol polyurethane foam formulations
- Gas-phase radical-quenching mechanism active at very low concentration (1–3 phr in PU foam)
- Low viscosity (<3 mPa·s) simplifies dosing and mixing in polyurethane foam dispensing systems
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