Monoammonium Phosphate (MAP) Flame Retardant

Name: Monoammonium Phosphate (MAP) Flame Retardant
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 7722-76-1

Monoammonium phosphate (MAP) is a water-soluble nitrogen–phosphorus flame retardant used primarily for fire retarding wood, paper, textiles, and other cellulosic materials. Upon heating, it decomposes to release phosphoric acid (the char-forming catalyst) and ammonia (inert gas diluent), creating an effective intumescent barrier on the substrate surface. MAP is widely used in forestry wildfire suppressants, fire-retardant paint formulations, and industrial textile finishing.

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Technical Specifications

appearance	White crystalline powder or granules
purity (%)	≥99
moisture (%)	<0.2
nitrogen content (%)	12–13
phosphorus content (%)	26–27
pH (1% solution, 25°C)	4.0–4.5

Applications

Wood and timber fire-retardant impregnation (pressure and dip treatment)
Aerial wildfire suppression retardant formulations
Cotton and linen flame-retardant textile finishing
Fire-retardant paper and corrugated board manufacture
Intumescent paint and coating acid source component

Key Features

High water solubility enables easy preparation of aqueous fire-retardant treatment solutions
Low cost and widely available from established fertilizer-grade supply chains
Dual N–P mechanism provides both catalytic char formation and inert gas dilution on ignition
Low residual odor and color after treatment, suitable for visible wood surfaces