Record Information
Version1.0
Creation Date2009-03-06 18:58:20 UTC
Update Date2026-03-26 18:49:36 UTC
Accession NumberCHEM000208
Identification
Common NameEthoprop
ClassSmall Molecule
DescriptionEthoprop is an organophosphate acetylcholinesterase inhibitor used as an insecticide. It is extremely toxic to mammals. (1, 2)
Contaminant Sources
  • Clean Air Act Chemicals
  • EPA Endocrine Screening
  • HPV EPA Chemicals
  • My Exposome Chemicals
  • STOFF IDENT Compounds
  • T3DB toxins
  • ToxCast & Tox21 Chemicals
Contaminant Type
  • Organic Compound
  • Organophosphate
  • Pesticide
  • Synthetic Compound
Chemical Structure
Thumb
Synonyms
ValueSource
O-Ethyl S,S-dipropyl dithiophosphateChEBI
Phosphorodithioic acid, O-ethyl S,S-dipropyl esterChEBI
O-Ethyl S,S-dipropyl dithiophosphoric acidGenerator
Phosphorodithioate, O-ethyl S,S-dipropyl esterGenerator
MocapMeSH
Chemical FormulaC8H19O2PS2
Average Molecular Mass242.339 g/mol
Monoisotopic Mass242.056 g/mol
CAS Registry Number13194-48-4
IUPAC Nameethyl bis(propylsulfanyl)phosphinate
Traditional Namemocap
SMILESCCCSP(=O)(OCC)SCCC
InChI IdentifierInChI=1S/C8H19O2PS2/c1-4-7-12-11(9,10-6-3)13-8-5-2/h4-8H2,1-3H3
InChI KeyVJYFKVYYMZPMAB-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as organothiophosphorus compounds. These are organic derivatives of thiophosphonic acid, thiophosphoric acid, dithiophosphoric acid, or phosphorotrithioic acid, or derivatives thereof. Thiophosphonic acid, dithiophosphoric acid, thiophosphoric acid, and phosphorotrithioic acid are thiophosphorus compounds with the formula OP(O)(=S), OP(S)(=S)O, OP(O)(=S)O, and OP(=S)(S)S, respectively.
KingdomOrganic compounds
Super ClassOrganophosphorus compounds
ClassOrganothiophosphorus compounds
Sub ClassNot Available
Direct ParentOrganothiophosphorus compounds
Alternative Parents
Substituents
  • Sulfenyl compound
  • Organothiophosphorus compound
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organosulfur compound
  • Organooxygen compound
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Biological Properties
StatusDetected and Not Quantified
OriginExogenous
Cellular Locations
  • Membrane
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
Applications
Biological Roles
Chemical Roles
Physical Properties
StateLiquid
AppearanceEthoprop is a clear yellow-tinted liquid with a strong mercaptan odor. (1)
Experimental Properties
PropertyValue
Melting Point-13°C
Boiling Point86-91 °C at 0.2 mmHg.
Solubility0.75 mg/mL at 25 °C [WAUCHOPE,RD et al.(1991A)]
Predicted Properties
PropertyValueSource
Water Solubility1.07 g/LALOGPS
logP2.86ALOGPS
logP3.22ChemAxon
logS-2.4ALOGPS
pKa (Strongest Basic)-7.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area26.3 ŲChemAxon
Rotatable Bond Count8ChemAxon
Refractivity64.39 m³·mol⁻¹ChemAxon
Polarizability25.72 ųChemAxon
Number of Rings0ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, PositiveNot AvailableSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 7V, positivesplash10-01bc-0690000000-8681ace6768e1d9f6326Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 14V, positivesplash10-00e9-0920000000-81a32023fd3cacfdcfc3Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 21V, positivesplash10-001i-1900000000-49bb2e6fed257324d78cSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 29V, positivesplash10-01q9-2900000000-da41148114fe30189cc5Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 36V, positivesplash10-03di-2900000000-db020804cf496556e55aSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 43V, positivesplash10-03di-3900000000-a080635f80f4e6f9d75bSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 58V, positivesplash10-03di-8900000000-45f290cd35be0f620614Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 72V, positivesplash10-03di-9300000000-cd17582805e0be99726eSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT 87V, positivesplash10-03di-9100000000-c114e9081d6064271a71Spectrum
LC-MS/MSLC-MS/MS Spectrum - 120V, Positivesplash10-03di-8900000000-45f290cd35be0f620614Spectrum
LC-MS/MSLC-MS/MS Spectrum - 75V, Positivesplash10-03di-2900000000-db020804cf496556e55aSpectrum
LC-MS/MSLC-MS/MS Spectrum - 90V, Positivesplash10-03di-3900000000-a080635f80f4e6f9d75bSpectrum
LC-MS/MSLC-MS/MS Spectrum - 15V, Positivesplash10-01bc-0690000000-8681ace6768e1d9f6326Spectrum
LC-MS/MSLC-MS/MS Spectrum - 30V, Positivesplash10-00e9-0920000000-81a32023fd3cacfdcfc3Spectrum
LC-MS/MSLC-MS/MS Spectrum - 60V, Positivesplash10-01q9-2900000000-da41148114fe30189cc5Spectrum
LC-MS/MSLC-MS/MS Spectrum - 45V, Positivesplash10-001i-1900000000-49bb2e6fed257324d78cSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0006-9360000000-9bfb4b54b4af316dddcaSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0006-9320000000-63de6a51b69cfd14f42bSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0006-9000000000-0793ec8eedfcf9ec6ccfSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0297-1950000000-858774a13b8506b53943Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-01tl-6950000000-fc7f5ce664f05ccc7de9Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0udi-1900000000-540dceb73c4f23ce2a61Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-014l-4950000000-ba6e1a2b9a22fff7a92dSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-00di-2900000000-f72d452eec4abd9bf86cSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-000i-0900000000-5c41d55104296e732300Spectrum
MSMass Spectrum (Electron Ionization)splash10-054o-9710000000-f6129dcf135c0b4d4c2bSpectrum
Toxicity Profile
Route of ExposureOral (2) ; inhalation (2) ; dermal (2)
Mechanism of ToxicityEthoprop is a cholinesterase or acetylcholinesterase (AChE) inhibitor. A cholinesterase inhibitor (or 'anticholinesterase') suppresses the action of acetylcholinesterase. Because of its essential function, chemicals that interfere with the action of acetylcholinesterase are potent neurotoxins, causing excessive salivation and eye-watering in low doses, followed by muscle spasms and ultimately death. Nerve gases and many substances used in insecticides have been shown to act by binding a serine in the active site of acetylcholine esterase, inhibiting the enzyme completely. Acetylcholine esterase breaks down the neurotransmitter acetylcholine, which is released at nerve and muscle junctions, in order to allow the muscle or organ to relax. The result of acetylcholine esterase inhibition is that acetylcholine builds up and continues to act so that any nerve impulses are continually transmitted and muscle contractions do not stop. Among the most common acetylcholinesterase inhibitors are phosphorus-based compounds, which are designed to bind to the active site of the enzyme. The structural requirements are a phosphorus atom bearing two lipophilic groups, a leaving group (such as a halide or thiocyanate), and a terminal oxygen.
MetabolismMetabolism of organophosphates occurs principally by oxidation, by hydrolysis via esterases and by reaction with glutathione. Demethylation and glucuronidation may also occur. Oxidation of organophosphorus pesticides may result in moderately toxic products. In general, phosphorothioates are not directly toxic but require oxidative metabolism to the proximal toxin. The glutathione transferase reactions produce products that are, in most cases, of low toxicity. Paraoxonase (PON1) is a key enzyme in the metabolism of organophosphates. PON1 can inactivate some organophosphates through hydrolysis. PON1 hydrolyzes the active metabolites in several organophosphates insecticides as well as, nerve agents such as soman, sarin, and VX. The presence of PON1 polymorphisms causes there to be different enzyme levels and catalytic efficiency of this esterase, which in turn suggests that different individuals may be more susceptible to the toxic effect of organophosphate exposure.
Toxicity ValuesLD50: 56.2 mg/kg (Oral, Rat) (1) LD50: 30.2 mg/kg (Oral, FeRat) (1) LD50: 23.7 ul/kg (Dermal, Rabbit) (1) LD50: 60 mg/kg (Percutaneous, Rat) (3) LC50: 250 mg/L over 4 hours (Inhalation, Rat) (2)
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesEthoprop is used as an insecticide. (2)
Minimum Risk LevelNot Available
Health EffectsAcute exposure to cholinesterase inhibitors can cause a cholinergic crisis characterized by severe nausea/vomiting, salivation, sweating, bradycardia, hypotension, collapse, and convulsions. Increasing muscle weakness is a possibility and may result in death if respiratory muscles are involved. Accumulation of ACh at motor nerves causes overstimulation of nicotinic expression at the neuromuscular junction. When this occurs symptoms such as muscle weakness, fatigue, muscle cramps, fasciculation, and paralysis can be seen. When there is an accumulation of ACh at autonomic ganglia this causes overstimulation of nicotinic expression in the sympathetic system. Symptoms associated with this are hypertension, and hypoglycemia. Overstimulation of nicotinic acetylcholine receptors in the central nervous system, due to accumulation of ACh, results in anxiety, headache, convulsions, ataxia, depression of respiration and circulation, tremor, general weakness, and potentially coma. When there is expression of muscarinic overstimulation due to excess acetylcholine at muscarinic acetylcholine receptors symptoms of visual disturbances, tightness in chest, wheezing due to bronchoconstriction, increased bronchial secretions, increased salivation, lacrimation, sweating, peristalsis, and urination can occur. Certain reproductive effects in fertility, growth, and development for males and females have been linked specifically to organophosphate pesticide exposure. Most of the research on reproductive effects has been conducted on farmers working with pesticides and insecticdes in rural areas. In females menstrual cycle disturbances, longer pregnancies, spontaneous abortions, stillbirths, and some developmental effects in offspring have been linked to organophosphate pesticide exposure. Prenatal exposure has been linked to impaired fetal growth and development. Neurotoxic effects have also been linked to poisoning with OP pesticides causing four neurotoxic effects in humans: cholinergic syndrome, intermediate syndrome, organophosphate-induced delayed polyneuropathy (OPIDP), and chronic organophosphate-induced neuropsychiatric disorder (COPIND). These syndromes result after acute and chronic exposure to OP pesticides.
SymptomsEarly symptoms of poisoning may include excessive sweating, headache, weakness, giddiness, nausea, vomiting, hypersalivation, stomach pains, blurred vision, slurred speech and muscle twitching. Later, there may be convulsions and coma. (2)
TreatmentIf the compound has been ingested, rapid gastric lavage should be performed using 5% sodium bicarbonate. For skin contact, the skin should be washed with soap and water. If the compound has entered the eyes, they should be washed with large quantities of isotonic saline or water. In serious cases, atropine and/or pralidoxime should be administered. Anti-cholinergic drugs work to counteract the effects of excess acetylcholine and reactivate AChE. Atropine can be used as an antidote in conjunction with pralidoxime or other pyridinium oximes (such as trimedoxime or obidoxime), though the use of '-oximes' has been found to be of no benefit, or possibly harmful, in at least two meta-analyses. Atropine is a muscarinic antagonist, and thus blocks the action of acetylcholine peripherally.
Concentrations
Not Available
DrugBank IDNot Available
HMDB IDHMDB0252020
FooDB IDNot Available
Phenol Explorer IDNot Available
KNApSAcK IDNot Available
BiGG IDNot Available
BioCyc IDNot Available
METLIN IDNot Available
PDB IDNot Available
Wikipedia LinkEthoprophos
Chemspider ID3173
ChEBI ID38665
PubChem Compound ID3289
Kegg Compound IDC18687
YMDB IDNot Available
ECMDB IDNot Available
References
Synthesis ReferenceNot Available
MSDSNot Available
General ReferencesNot Available