Melting point :6.1°C
Boiling point :375°C
Density :1.26
vapor pressure :0.470 at 20 °C, 0.942 at 25 °C, 1.84 at 30 °C, 3.53 at 35 °C, 6.62 at 40 °C, 12.18 at 45 °C (gassaturation method, Spencer et al., 1979)
refractive index :nD25 1.5370
Flash point :120 °C
storage temp. :APPROX 4°C
solubility :2,900 and 2,700 g/kg in petroleum ether and heptane, respectively (Williams, 1951)
form :liquid
color :Pale-yellow liquid
Water Solubility :Slightly soluble
Merck :13,7105
BRN :8912188
Henry's Law Constant :8.56 at 25 °C (wetted-wall column, Fendinger and Glotfelty, 1990)
Exposure limits :NIOSH REL: TWA 0.05 mg/m3, IDLH 10 mg/m3; OSHA PEL: TWA 0.1 mg/m3.
Stability :Hygroscopic, Moisture Sensitive
CAS DataBase Reference :56-38-2(CAS DataBase Reference)
IARC :2B (Vol. 30, Sup 7, 112) 2017
NIST Chemistry Reference :Ethyl parathion (o,o-diethyl-o-p-nitrophenylthiophosphate)(56-38-2)
EPA Substance Registry System :Parathion (56-38-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P262 Do not get in eyes, on skin, or on clothing. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P314 Get medical advice/attention if you feel unwell.