Demeton

Demeton

Names
IUPAC name O,O-Diethyl S-2-(ethylsulfanyl)ethyl phosphorothioate
Other names Demeton thiol; Izosystox
Identifiers
CAS Number	126-75-0 N
3D model (Jmol)	Interactive image
ChemSpider	23115 Y
ECHA InfoCard	100.149.173
PubChem	24723
InChI InChI=1S/C8H19O3PS2/c1-4-10-12(9,11-5-2)14-8-7-13-6-3/h4-8H2,1-3H3 Y Key: GRPRVIYRYGLIJU-UHFFFAOYSA-N Y InChI=1/C8H19O3PS2/c1-4-10-12(9,11-5-2)14-8-7-13-6-3/h4-8H2,1-3H3 Key: GRPRVIYRYGLIJU-UHFFFAOYAI
SMILES O=P(OCC)(SCCSCC)OCC
Properties
Chemical formula	C8H19O3PS2
Molar mass	258.3384 g/mol
Appearance	colorless to amber oily liquid
Odor	sulfurous
Density	1.146 g/cm3
Boiling point	128 °C (262 °F; 401 K)
Solubility in water	2.0 g/100 mL
Refractive index (nD)	1.5
Hazards
Flash point	147.6 °C (297.7 °F; 420.8 K)
Lethal dose or concentration (LD, LC):
LD50 (median dose)	1.5 mg/kg (oral, rat)
LDLo (lowest published)	5 mg/kg (rabbit, oral) 7.85 mg/kg (mouse, oral) 1.7 mg/kg (rat, oral)
LCLo (lowest published)	15 mg/m3 (rat, 4 hr) 15 mg/m3 (cat, 4 hr)
US health exposure limits (NIOSH):
PEL (Permissible)	TWA 0.1 mg/m3 [skin]
REL (Recommended)	TWA 0.1 mg/m3 [skin]
IDLH (Immediate danger)	10 mg/m3
Related compounds
Related Organothiophosphate insecticides	Demeton-S-methyl
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Demeton is a phosphorothioate insecticide with the chemical formula C₈H₁₉O₃PS₂.

See also

• Demeton-S-methyl
• Disulfoton, its phosphorodithioate equivalent