Zinc Diethylphosphinate (ZnDEP)

Name: Zinc Diethylphosphinate (ZnDEP)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 91723-15-8

Zinc diethylphosphinate (ZnDEP) is a halogen-free organophosphorus flame retardant synergist used in combination with aluminum diethylphosphinate (AlDEP) or melamine polyphosphate (MPP) to enhance flame retardant performance in polyamide and polyester systems. The zinc cation acts as a Lewis acid catalyst that promotes char formation and viscosity increase in the condensed phase, preventing dripping and improving LOI. ZnDEP is also used as a sole FR agent in specific polyester and PP applications requiring moderate flame retardancy.

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Technical Specifications

appearance	White powder
moisture (%)	<0.3
zinc content (%)	19–20
phosphorus content (%)	22–23
particle size D50 (µm)	10–25
decomposition temperature (°C)	>280

Applications

Synergist with AlDEP in glass-filled PA6/PA66 for enhanced anti-drip and char formation
PBT and PET thermoplastic polyester flame retardant compounds
Polypropylene compounds requiring moderate halogen-free flame retardancy
Synergist blend with MPP in unreinforced polyamide systems
Thermoplastic elastomer (TPE) cable compounds with halogen-free FR requirements

Key Features

Zinc Lewis acid catalysis enhances char formation and melt viscosity to suppress dripping in PA/PBT
Synergistic with AlDEP enabling lower total FR loading for equivalent UL94 V-0 performance
Good thermal stability (>280 °C) for polyester and polyamide compounding conditions
Halogen-free and low toxicity profile suitable for E&E components under RoHS and REACH