Bis(neopentyl glycol) Phosphonate Flame Retardant

Name: Bis(neopentyl glycol) Phosphonate Flame Retardant
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 5301-78-0

Bis(neopentyl glycol) phosphonate is a cyclic organophosphorus flame retardant known for its high phosphorus content, low volatility, and excellent thermal and hydrolytic stability. Its bicyclic structure restricts conformational flexibility, imparting outstanding resistance to hydrolysis under humid conditions. It is used as an additive or reactive flame retardant in polyurethanes, coatings, and cellulosic substrate treatments where long-term performance is required.

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Technical Specifications

appearance	Colorless to pale yellow liquid or white crystalline solid
purity (%)	≥97
moisture (%)	≤0.3
flash point (°C)	>150
boiling point (°C)	>300
phosphorus content (%)	14–16

Applications

Polyurethane flexible and rigid foam flame retardant additive
Waterborne and solventborne wood and timber FR coating formulations
Cellulosic textile and paper durable flame retardant treatment
Epoxy and unsaturated polyester resin flame retardant modifier
Agricultural mulch film and greenhouse covering FR additive

Key Features

Bicyclic neopentyl structure provides exceptional hydrolysis resistance under tropical and high-humidity conditions
High phosphorus content (15%) enables effective flame retardancy at moderate addition levels
Low volatility and high boiling point minimize loss during high-temperature polymer processing
Halogen-free phosphorus mechanism with low smoke and low toxic gas emission