Names

IUPAC name
O,O-Dimethyl O-[3-methyl-4-(methylsulfanyl)phenyl] phosphorothioate

Other names
• Dimethoxy-[3-methyl-4-(methylthio)phenoxy]-thioxophosphorane
• O,O-Dimethyl O-[3-methyl-4-(methylthio)phenyl] phosphorothioate
• O,O-Dimethyl O-4-methylthio-m-tolyl phosphorothioate

Identifiers

CAS Registry Number

55-38-9 

Properties

Chemical formula

C10H15O3PS2

Molar mass

278.33 g/mol

Appearance

colorless, almost odorless liquid; 95-98% pure Fenthion is a brown oily liquid with a weak garlic odor

Density

1.250 g/cm3 (at 20 °C / 4 °C)

Melting point

7 °C (45 °F; 280 K)

Boiling point

87 °C (189 °F; 360 K) at 0.01 mmHg

Solubility in water

54-56 ppm (at 20 °C)

Solubility in glyceride oils, methanol, ethanol, ether, acetone, and most organic solvents, especially chlorinated hydrocarbons

soluble

Vapor pressure

4 • 10−5 mmHg (at 20 °C)

REL (Recommended)

None established

IDLH (Immediate danger

N.D.