Diethyl Ethylphosphonate (DEEP) Flame Retardant

Overview

Diethyl ethylphosphonate (DEEP) is a colorless, low-viscosity liquid with a phosphorus content of about 18.6%. It is a halogen-free additive flame retardant that also lowers the viscosity of polyol blends.

Also known as

DEEP; Diethyl ethanephosphonate; Ethylphosphonic acid diethyl ester

CAS number

78-38-6

Molecular formula

C6H15O3P

Molecular weight

166.16

Specifications

Test items	Specifications
Appearance	Colorless transparent liquid
Content /%	≥96.5
Water content /%	≤0.1
Phosphorus content /%	18.65
Color (Hazen)	≤50
Viscosity (25℃) /mPa·s	1.5
Density /(g/cm³)	1.020-1.030

Applications

• Flame retardant for rigid polyurethane and polyisocyanurate foams
• Viscosity reducer for polyol blends and resin systems
• Flame retardant for unsaturated polyester and epoxy resins
• Solvent and metal extractant

Packaging

200 kg/drum; 1000 kg/IBC; ISO tank on request.

Storage

Store in tightly closed containers in a dry, clean and well-ventilated place, away from heat and direct sunlight.