Melamine (Gas Source) Flame Retardant / IFR Blowing Agent
CAS Number: 108-78-1
Featured inFlame Retardants
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
| appearance | White 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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CAS Number
108-78-1
Category
Fire Retardant ChemicalsAvailability
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