Boiling point :82-83 °C (11 mmHg)
Density :1.024 g/mL at 20 °C(lit.)
vapor pressure :7.2hPa at 20℃
refractive index :n20/D 1.417
Flash point :105°C
solubility :Chloroform (Soluble), Dichloromethane, Ethyl Acetate (Slightly)
form :Liquid
color :Clear colorless
Water Solubility :Miscible with alcohol, ether and organic solvents. Slightly miscible with water.
BRN :1756861
Dielectric constant :9.9（45℃）
Stability :Stable, but hydrolyzes under both acidic and basic conditions. Incompatible with strong oxidizing agents.
LogP :3.2 at 20℃
CAS DataBase Reference :78-38-6(CAS DataBase Reference)
EPA Substance Registry System :Diethyl ethylphosphonate (78-38-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H313 May be harmful in contact with skin Acute toxicity,dermal Category 5 P312 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H401 Toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 2 P273, P501 H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P337+P313 IF eye irritation persists: Get medical advice/attention.