Dimethyl Methylphosphonate (DMMP)

Name: Dimethyl Methylphosphonate (DMMP)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 756-79-6

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.

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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