Aluminum Diethylphosphinate (AlDEP / DEPAL)
CAS Number: 225789-38-8
Aluminum diethylphosphinate (AlDEP, also known as DEPAL) is a high-efficiency, halogen-free organophosphorus flame retardant specifically designed for glass-fiber-reinforced polyamide (PA6, PA66) and polyester (PBT, PET) compounds. It acts in both the gas phase (via diethylphosphinic acid release) and the condensed phase (via char promotion), achieving UL94 V-0 at 10–20% loading in GF-PA systems. AlDEP is the benchmark halogen-free FR for the electrical and electronics (E&E) industry in engineering thermoplastics.
Technical Specifications
| appearance | White powder |
| moisture (%) | <0.3 |
| aluminum content (%) | 9.5–10.0 |
| phosphorus content (%) | 23–24 |
| particle size D50 (µm) | 10–30 |
| melting/decomposition temperature (°C) | >300 |
Applications
- Glass-fiber-reinforced PA6/PA66 for E&E connectors, switches, and circuit breakers
- Glass-fiber-reinforced PBT and PET for automotive electrical components
- Synergistic blend with melamine polyphosphate (MPP) for superior PA66 FR performance
- PET and PBT fiber and film applications requiring UL94 VTM-0
- Thermoplastic polyurethane (TPU) compounds for cable sheaths and connectors
Key Features
- Best-in-class halogen-free FR for GF-PA66 achieving UL94 V-0 at 1.6 mm with synergists
- High thermal stability (>300 °C) compatible with PA66 processing at 270–290 °C
- Dual gas-phase/condensed-phase mechanism provides robust FR performance across PA and polyester systems
- Industry benchmark product with broad OEM approvals in automotive and E&E sectors
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CAS Number
225789-38-8
Category
Fire Retardant ChemicalsAvailability
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