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Substance Name: Paraquat [ANSI:BSI:ISO]
RN: 4685-14-7
UNII: PLG39H7695
InChIKey: INFDPOAKFNIJBF-UHFFFAOYSA-N

Note

  • A poisonous dipyridilium compound used as contact herbicide. Contact with concentrated solutions causes irritation of the skin, cracking and shedding of the nails, and delayed healing of cuts and wounds.

Molecular Formula

  • C12-H14-N2

Molecular Weight

  • 186.2566
 

Classification Codes

Classification Codes

  • Agricultural Chemical
  • Antiviral (COVID-19)
  • Herbicide
  • Herbicides
  • Human Data
  • Mutation Data
  • Pesticides

Superlist Classification Codes

  • TWA 0.1 mg/m3(respirable fraction); 0.5 mg/m3
  • TWA 0.5 mg/m3 respirable dust; skin
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Names and Synonyms

Results Name

  • Paraquat [ANSI:BSI:ISO]

Name of Substance

  • Paraquat
  • Paraquat [ANSI:BSI:ISO]

MeSH Heading

  • Paraquat

Synonyms

  • 1,1'-Dimethyl-4,4'-bipyridinium
  • 1,1'-Dimethyl-4,4'-bipyridinium cation
  • 1,1'-Dimethyl-4,4'-bipyridinium salt
  • 1,1'-Dimethyl-4,4'-bipyridyldiylium
  • 1,1'-Dimethyl-4,4'-bipyridyldiylium ion (8CI)(9CI)
  • CCRIS 7731
  • Dextrone
  • Dextrone X
  • Dimethyl viologen
  • EINECS 225-141-7
  • HSDB 1668
  • Methyl viologen (2+)
  • Methyl viologen ion(2+)
  • N,N'-Dimethyl-4,4'-bipyridinium
  • N,N'-Dimethyl-4,4'-bipyridinium dication
  • N,N'-Dimethyl-gamma,gamma'-dipyridylium
  • Paraquat
  • Paraquat dication
  • Paraquat ion
  • Spraytop-graze
  • Starfire
  • UNII-PLG39H7695
  • Weedol

Systematic Names

  • 1,1'-Dimethyl-4,4'-bipyridinium
  • 4,4'-Bipyridinium, 1,1'-dimethyl-
  • Paraquat

Superlist Names

  • 4,4'-Bipyridinium, 1,1'-dimethyl-
  • Paraquat

Registry Numbers

CAS Registry Number

  • 4685-14-7

FDA UNII

  • PLG39H7695

Other Registry Number

  • 116047-10-0

System Generated Number

  • 0004685147

Structure Descriptors

InChI

InChI=1S/C12H14N2/c1-13-7-3-11(4-8-13)12-5-9-14(2)10-6-12/h3-10H,1-2H3/q+2

InChIKey

INFDPOAKFNIJBF-UHFFFAOYSA-N

Smiles

C[n+]1ccc(cc1)c2cc[n+](C)cc2

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
cat LD50 oral 35mg/kg (35mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 10, Pg. 520, 1979.
chicken LD50 oral 262mg/kg (262mg/kg)   Pesticide Manual. Vol. 9, Pg. 646, 1991.
dog LD50 oral 25mg/kg (25mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 10, Pg. 520, 1979.
guinea pig LD50 oral 30mg/kg (30mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 10, Pg. 520, 1979.
mammal (species unspecified) LD50 oral 70mg/kg (70mg/kg)   Pesticide Manual. Vol. 9, Pg. 646, 1991.
man LDLo oral 171mg/kg (171mg/kg) LUNGS, THORAX, OR RESPIRATION: "FIBROSIS, FOCAL (PNEUMOCONIOSIS)"

GASTROINTESTINAL: CHANGE IN STRUCTURE OR FUNCTION OF ESOPHAGUS

GASTROINTESTINAL: ULCERATION OR BLEEDING FROM STOMACH		 Journal of Toxicology, Clinical Toxicology. Vol. 26, Pg. 35, 1988.
man LDLo oral 200mg/kg (200mg/kg) LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION

KIDNEY, URETER, AND BLADDER: RENAL FUNCTION TESTS DEPRESSED		 Medical Journal of Australia. Vol. 158, Pg. 28, 1993.
man LDLo oral 343mg/kg (343mg/kg) GASTROINTESTINAL: ULCERATION OR BLEEDING FROM STOMACH

KIDNEY, URETER, AND BLADDER: RENAL FUNCTION TESTS DEPRESSED

GASTROINTESTINAL: CHANGE IN STRUCTURE OR FUNCTION OF ESOPHAGUS		 Journal of Toxicology, Clinical Toxicology. Vol. 26, Pg. 35, 1988.
man LDLo oral 1690mg/kg (1690mg/kg) KIDNEY, URETER, AND BLADDER: RENAL FUNCTION TESTS DEPRESSED

GASTROINTESTINAL: ULCERATION OR BLEEDING FROM STOMACH

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION		 Journal of Toxicology, Clinical Toxicology. Vol. 26, Pg. 35, 1988.
mouse LD50 oral 120mg/kg (120mg/kg)   General Pharmacology. Vol. 14, Pg. 541, 1983.
mouse LD50 unreported 198mg/kg (198mg/kg) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

BEHAVIORAL: CHANGES IN MOTOR ACTIVITY (SPECIFIC ASSAY)		 Gigiena Naselennykh Mest. Hygiene in Populated Places. Vol. 17, Pg. 37, 1978.
rabbit LD50 skin 236mg/kg (236mg/kg)   Pesticide Manual. Vol. 9, Pg. 646, 1991.
rat LD50 intraperitoneal 14800ug/kg (14.8mg/kg) GASTROINTESTINAL: OTHER CHANGES

LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

LIVER: OTHER CHANGES		 Veterinary and Human Toxicology. Vol. 22, Pg. 395, 1980.
rat LD50 oral 100mg/kg (100mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 10, Pg. 520, 1979.
rat LD50 unreported 250mg/kg (250mg/kg) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

BEHAVIORAL: CHANGES IN MOTOR ACTIVITY (SPECIFIC ASSAY)		 Gigiena Naselennykh Mest. Hygiene in Populated Places. Vol. 17, Pg. 37, 1978.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 300 dec deg C   EXP
log P (octanol-water) -4.22E+00 (none)   EXP
Water Solubility 6.20E+05 mg/L   EXP
Vapor Pressure 1.00E-07 mm Hg 25 EST
Henry's Law Constant 1.00E-09 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 2.12E-11 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.