Parathion

Parathion, also called parathion-ethyl or diethyl parathion and locally known as "Folidol", is an organophosphate insecticide and acaricide. It was originally developed by IG Farben in the 1940s. It is highly toxic to non-target organisms, including humans, so its use has been banned or restricted in most countries. The basic structure is shared by parathion methyl.

Parathion
Names
Preferred IUPAC name
O,O-Diethyl O-(4-nitrophenyl) phosphorothioate
Other names
E605
Identifiers
3D model (JSmol)
2059093
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.247
EC Number
  • 200-271-7
KEGG
RTECS number
  • TF4550000
UNII
UN number 3018 2783
  • InChI=1S/C10H14NO5PS/c1-3-14-17(18,15-4-2)16-10-7-5-9(6-8-10)11(12)13/h5-8H,3-4H2,1-2H3 Y
    Key: LCCNCVORNKJIRZ-UHFFFAOYSA-N Y
  • InChI=1/C10H14NO5PS/c1-3-14-17(18,15-4-2)16-10-7-5-9(6-8-10)11(12)13/h5-8H,3-4H2,1-2H3
    Key: LCCNCVORNKJIRZ-UHFFFAOYAR
  • S=P(Oc1ccc(cc1)[N+]([O-])=O)(OCC)OCC
Properties
C10H14NO5PS
Molar mass 291.26 g·mol−1
Appearance White crystals (pure form)
Melting point 6 °C (43 °F; 279 K)
24 mg/L
Solubility in other solvents high solubility

in xylene and butanol

Hazards
GHS labelling:
Danger
H300, H311, H330, H372, H410
P260, P264, P270, P271, P273, P280, P284, P301+P310, P302+P352, P304+P340, P310, P312, P314, P320, P321, P322, P330, P361, P363, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)
4
1
2
Flash point 120 °C (248 °F; 393 K)
Lethal dose or concentration (LD, LC):
5 mg/kg (mouse, oral)
10 mg/kg (rabbit, oral)
3 mg/kg (dog, oral)
0.93 mg/kg (cat, oral)
5 mg/kg (horse, oral)
8 mg/kg (guinea pig, oral)
2 mg/kg (rat, oral)
84 mg/m3 (rat, 4 hr)
50 mg/m3 (rabbit, 2 hr)
14 mg/m3 (guinea pig, 2 hr)
15 mg/m3 (mouse)
NIOSH (US health exposure limits):
PEL (Permissible)
 none (methyl parathion), TWA 0.1 mg/m3 [skin] (ethyl parathion)
REL (Recommended)
 TWA 0.2 mg/m3 [skin] (methyl parathion) TWA 0.05 mg/m3 [skin] (ethyl parathion)
IDLH (Immediate danger)
 N.D. (methyl parathion) 10 mg/m3 (ethyl parathion)
Safety data sheet (SDS)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references
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