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Melamine (Gas Source) Flame Retardant / IFR Blowing Agent

CAS Number: 108-78-1

Melamine is the standard gas source (blowing agent) component in the classic APP/PER/MEL ternary intumescent flame retardant system used in structural steel fireproofing coatings, halogen-free polyolefin FR compounds, and passive fire protection products. Upon decomposition at 250–300 °C, melamine releases large volumes of NH3 and CO2 that inflate the char formed by the acid source/carbon source reaction, creating a thick insulating foam layer. The high nitrogen content (66.6%) also contributes to gas-phase flame inhibition.

Technical Specifications

appearanceWhite crystalline powder
moisture (%)<0.1
melamine purity (%)≥99.5
nitrogen content (%)66.0–66.7
particle size D50 (µm)20–50
decomposition temperature (°C)250–300

Applications

  • Gas source in APP/PER/MEL ternary intumescent fireproofing coatings for structural steel
  • Nitrogen gas source in halogen-free intumescent FR polyolefin cable compounds
  • Passive fire protection board and mat binder matrix component
  • Intumescent fire stop product formulations (sealants, collars, pillows)
  • Co-synergist with APP in wood and cellulosic substrate intumescent treatments

Key Features

  • Standard gas source for proven APP/PER/MEL intumescent system with extensive global code approvals
  • High nitrogen content (66.6%) releases large NH3 volume to generate maximum char expansion
  • Widely available commodity chemical with consistent quality and competitive pricing
  • Low molecular weight (126 g/mol) maximizes molar gas release per kilogram for foam expansion

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Melamine (Gas Source) Flame Retardant / IFR Blowing Agent chemical structure

CAS Number

108-78-1

Availability

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