Ethylene Bis(tetrabromophthalimide) (EBTBPI / BT-93)

Name: Ethylene Bis(tetrabromophthalimide) (EBTBPI / BT-93)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 32588-76-4

Featured inFlame Retardants

Ethylene bis(tetrabromophthalimide) (EBTBPI, trade name BT-93) is a thermally stable, high-bromine-content additive flame retardant specifically designed for high-temperature engineering thermoplastics including polyamide, PBT, PET, and polypropylene. Its imide structure provides exceptional thermal stability up to 370 °C, preventing decomposition during high-temperature polymer processing and reducing corrosive HBr off-gassing during manufacture. EBTBPI is a preferred choice for high-performance glass-fiber-reinforced PA66 compounds in demanding automotive and electrical applications.

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Technical Specifications

appearance	White to off-white powder
moisture (%)	<0.2
bromine content (%)	67–68
bulk density (g/cm³)	0.4–0.6
particle size D50 (µm)	5–15
decomposition temperature (°C)	>370

Applications

High-temperature glass-fiber-reinforced PA66 for automotive under-hood connectors
PBT and PET engineering plastics for electrical and automotive components
Polypropylene compounds requiring halogenated FR with minimal color impact
Polyester fiber flame retardant treatment with high wash durability
High-performance rubber and elastomer compounds needing stable halogen FR

Key Features

Exceptional thermal stability (>370 °C) enables use in PA66, PBT, and PET at processing temperatures exceeding 280 °C
Imide linkage reduces corrosive HBr evolution during processing, protecting equipment and product quality
High bromine content (67–68%) provides efficient FR performance at lower loadings versus less stable alternatives
Excellent UV resistance and low color contribution preserve aesthetics of unpigmented or lightly colored parts