Microencapsulated Red Phosphorus Flame Retardant

Name: Microencapsulated Red Phosphorus Flame Retardant
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 7723-14-0

Featured inFlame Retardants

Microencapsulated red phosphorus is a highly efficient halogen-free phosphorus flame retardant with an extremely high active phosphorus content (85–92%), allowing very low loading levels to achieve UL94 V-0 ratings in polyamides and epoxy systems. The proprietary microencapsulation (typically melamine-formaldehyde or phenolic resin shell) resolves the handling, moisture sensitivity, and oxidation issues of uncoated red phosphorus, enabling safe processing in polymer compounding lines. It produces very low smoke and minimal toxic gas emission during combustion.

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Technical Specifications

appearance	Dark red or purple powder
pH (10% slurry)	5.5–7.5
encapsulant shell	Melamine-formaldehyde or phenolic resin
moisture content (%)	<0.3
phosphorus content (%)	85–92
particle size D50 (µm)	15–30

Applications

Polyamide PA6 and PA66 glass-filled compounds (UL94 V-0 at 8–12%)
Epoxy resin circuit board laminates and encapsulants (PCB FR-4 replacement)
Thermoplastic elastomers and rubber compounds
Adhesives and potting compounds for electronics
Polyurethane rigid foam with high phosphorus efficiency

Key Features

Exceptionally high phosphorus content (85–92%) enables lowest possible loading for UL94 V-0 compliance
Microencapsulation eliminates spontaneous ignition risk and moisture sensitivity for safe factory handling
Low loading (8–12%) minimizes impact on mechanical properties, melt flow, and color of PA compounds
Versatile compatibility with polyamides, epoxies, TPE, and rubber without corrosive halogen side products