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Chemical Properties

CAS Registry Number: 6923-22-4

Selected information from two of the National Library of Medicine's databases: ChemIDPlus2 and HSDB3.

Names 1

  • Monocrtophos

Structure

Chemical Structure for Chemical Abstracts Service Registry Number 6923-22-4 from NLM

Synonyms (Sources: NTP,HSDB,RTECS,MESH)2

  • (E)-Dimethyl 1-methyl-3-(methylamino)-3-oxo-1-propenyl phosphate
  • 3-(Dimethoxyphosphinyloxy)N-methyl-cis-crotonamide
  • 3-Dimethoxyphosphinoyloxy-N-methylisocrotonamide
  • Aimocron
  • Apadrin
  • Azodrin
  • Azodrin insecticide
  • Azodrin-71
  • BRN 2331934
  • Biloborn
  • Bilobran
  • C 1414
  • Ciba 1414
  • Corophos
  • Crisodrin
  • Crotonamide, 3-hydroxy-N-methyl-, dimethylphosphate, (E)-
  • Crotos
  • Dimethyl (E)-1-methyl-2-(methylcarbamoyl)vinyl phosphate
  • Dimethyl (E)-3-hydroxy-N-methylcrotonamide
  • Dimethyl 1-methyl-2-(methylcarbamoyl)vinyl phosphate, cis
  • Dimethyl phosphate ester of 3-hydroxy-N-methyl-cis-crotonamide
  • Dimethyl phosphate ester with (E)-3-hydroxy-N-methylcrotonamide
  • Dimethyl phosphate of 3-hydroxy-N-methyl-cis-crotonamide
  • ENT 27,129
  • Glore phos 36
  • HSDB 1591
  • Hazodrin
  • Monocil
  • Monocil 40
  • Monocron
  • Monodrin
  • Monokrotofosz (Hungarian)
  • N-Desmethyl bidrin
  • Nuvacron
  • Nuvacron 20
  • O,O-Dimethyl cis-1-methyl-2-methylcarbamoylvinylphosphate
  • O,O-Dimethyl-O-(1-methyl-2-N-methyl-carbamoyl)-vinyl-phosphat [German]
  • O,O-Dimethyl-O-(2-N-methylcarbamoyl-1-methyl)-vinyl-phosphat [German]
  • O,O-Dimethyl-O-(2-N-methylcarbamoyl-1-methyl-vinyl) phosphate
  • O,O-Dimethyl-O-(2-N-methylcarbamoyl-1-methyl-vinyl)-fosfaat [Dutch]
  • O,O-Dimetil-O-(2-N-metilcarbamoil-1-metil-vinil)-fosfato [Italian]
  • OMS 834
  • Pandar
  • Phosphate de dimethyle et de 2-methylcarbamoyl 1-methylvinyle [French]
  • Phosphoric acid, dimethyl 1-methyl-3-(methylamino)-3-oxo-1-propenyl ester, (E)-
  • Phosphoric acid, dimethyl ester, ester with (E)-3-hydroxy-N-methylcrotonamide
  • Phosphoric acid, dimethyl ester, ester with 3-hydroxy-N-methylcrotonamide, (E)-
  • Phosphoric acid, dimethyl ester, ester with cis-3-hydroxy-N-methylcrotonamide
  • Pillardrin
  • Plantdrin
  • Rapid X
  • SD 9129
  • Shell SD 9129
  • Susvin
  • Ulvair
  • cis-1-Methyl-2-methyl carbamoyl vinyl phosphate

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Other Registry Numbers2

  • 83857-41-4

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Chemical Properties3

Property Description
Boiling Point
  • 125 DEG C @ 760 MM HG
Color/Form
  • Colorless to reddish-brown solid.
  • Reddish brown solid
Corrosivity
  • CORROSIVE TO BLACK IRON, DRUM STEEL, STAINLESS STEEL 304 & BRASS.
  • Non-corrosive to aluminum.
Critical Temperature & Pressure
  • None Found
Density/Specific Gravity
  • 1.22 kg/l at 20 deg C
Dissociation Constants
  • None Found
Heat Of Combustion
  • None Found
Heat Of Vaporization
  • None Found
Melting Point
  • 54-55 DEG C
Molecular Weight
  • 223.17
Odor
  • Mild, ester odor.
Other Chemical/Physical Properties
  • ... Decomposes on some inert materials.
  • Rapidly hydrolyzed under alkaline conditions.
  • SOL IN WATER, ETHANOL, PETROLEUM ETHER, ACETONE /TECHNICAL GRADE/
  • technical grade contains < or = 74% monocrotophos.
Relative Evaporation Rate
  • None Found
Solubilities
  • In water 100% at 20 deg C; in methanol 100%, acetone 70%, n-octanol 25%, toluene 6% (all at 20 deg C). Sparingly soluble in kerosene and diesel oil.
  • MISCIBLE WITH WATER; SOL IN ACETONE, ETHANOL; PRACTICALLY INSOL IN DIESEL OILS, KEROSINE.
  • Solubility (20 deg C) 1 kg/kg water; 700 g/kg acetone; 800 g/kg dichloromethane; 1 kg/kg methanol; 250 g/kg octan-1-ol; 60 g/kg toluene.
  • Sparingly sol in xylene.
Spectral Properties
  • Index of refraction 1.4738 @ 25 deg C/D
  • Intense mass spectral peaks: 127 m/z (100%), 67 m/z (66%), 58 m/z (36%), 97 m/z (34%)
Surface Tension
  • None Found
Taste
  • None Found
Vapor Density
  • None Found
Vapor Pressure
  • 2.9X10-4 Pa at 20 deg C
Viscosity
  • None Found
log P (octanol-water)
  • log Kow = -0.20
pH
  • None Found

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Uses3

  • ... /Used/ on cotton for bollworms, fleahoppers, boll weevil, loopers, pink bollworm, plant bugs (lygus), beet armyworm, white flies, thrips and mites. On peanuts for mites, granulate cutworms, and lesser cornstalk borers. On tobacco for tobacco hornworm, vegetable weevil, green peach aphid and tobacco budworm. **PEER REVIEWED**
  • /Monocrotophos/ is a fast-acting systemic and contact insecticide of short persistence. **PEER REVIEWED**
  • Control of a broad spectrum of pests, including sucking, chewing, and boring insects, and spider mites on cotton, deciduous fruits, citrus fruits, vines, olives, hops, rice, maize, sorghum, coffee, sugar cane, sugar beet, groundnuts, potatoes, tomatoes, soya beans, vegetables, ornamentals, and tobacco. **PEER REVIEWED**
  • INSECTICIDE & ACARICIDE ON COTTON, POTATOES, PEANUTS, ORNAMENTALS, TOBACCO; & FOR SUGARCANE BORERS. /FORMER USE/ **PEER REVIEWED**
  • Systemic insecticide and acaricide with contact and stomach action /former/ **PEER REVIEWED**
  • The active ingredient is no longer contained in any registered pesticide products ... "cancelled." **QC REVIEWED**

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Notes (Sources: NTP,HSDB,RTECS,MESH)2

  • An organophosphate insecticide that inhibits monoamine oxidase and acetylcholinesterase. It has been shown to be genotoxic.

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Superlist Classes2

  • TWA (0.05 mg/m3, vapor and serosol, inhalable fraction); skin; Not classifiable as a human carcinogen; BEI
  • Threshold Planning Quantity (TPQ) = 10/10000 lb

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Links to Additional Information2

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Footnotes

1 Source: the NTP's CEBS database.

2 Source: the National Library of Medicine's ChemIDPlus, 02/28/2017.

3 Source: the National Library of Medicine's Hazardous Substance Database, 02/28/2017.

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