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Substance Name: Maleic hydrazide [BSI:ISO]
RN: 123-33-1
UNII: TQ7L3FCV66
InChIKey: BGRDGMRNKXEXQD-UHFFFAOYSA-N

Note

  • 1,2-Dihydro-3,6-pyridazinedione. A herbicide and plant growth regulator; also used to control suckering of tobacco. Its residue in food and tobacco is highly toxic, causing CNS disturbances and liver damage.

Molecular Formula

  • C4-H4-N2-O2

Molecular Weight

  • 112.0876
 

Classification Codes

Classification Codes

  • Agricultural Chemical
  • Growth Regulator / Fertilizer
  • Growth Substances
  • Herbicide
  • Herbicides
  • Mutation Data
  • Pesticides
  • Plant Growth Regulators
  • TSCA Flag T (Subject to the Final TSCA Section 4 Test Rule)
  • Tumor Data

Superlist Classification Codes

  • Overall Carcinogenic Evaluation: Group 3
  • Reportable Quantity (RQ) = 5000 lb
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Names and Synonyms

Results Name

  • Maleic hydrazide [BSI:ISO]

Name of Substance

  • Maleic hydrazide
  • Maleic hydrazide [BSI:ISO]

MeSH Heading

  • Maleic hydrazide

Synonyms

  • 1,2,3,6-Tetrahydro-3,6-dioxopyridazine
  • 1,2-Dihydro-3,6-pyradizinedione
  • 1,2-Dihydropyridazine-3,6-dione
  • 3(2H)-Pyridazinone, 6-hydroxy-
  • 3,6-Dihydroxypyridazine
  • 3,6-Dioxopyridazine
  • 3,6-Pyridazinediol
  • 3,6-Pyridazinedione, 1,2-dihydro-
  • 6-Hydroxy-2H-pyridazin-3-one
  • 6-Hydroxy-3(2H)-pyridazinone
  • AI3-18870
  • Antergon
  • Antyrost
  • Burtolin
  • Caswell No. 352
  • CCRIS 1879
  • Chemform
  • De-cut
  • De-sprout
  • Drexel-super P
  • EINECS 204-619-9
  • ENT 18,870
  • EPA Pesticide Chemical Code 051501
  • Fair 30
  • Fair plus
  • Fair PS
  • Fair-2
  • Fazor
  • Gotax
  • HSDB 1162
  • Hydrazid kyseliny maleinove
  • Hydrazid kyseliny maleinove [Czech]
  • Hydrazide maleique
  • Hydrazide maleique [ISO-French]
  • KMH
  • MAH
  • Maintain 3
  • Malazide
  • Maleic acid cyclic hydrazide
  • Maleic acid hydrazide
  • Maleic hydrazide
  • Maleic hydrazine
  • Malein 30
  • Maleinsaeurehydrazid
  • Maleinsaeurehydrazid [German]
  • Malzid
  • Mazide
  • MG-T
  • MH
  • MH 30
  • MH 36 bayer
  • MH-40
  • Milurit
  • N,N-Maleoylhydrazine
  • NSC 13892
  • RCRA waste number U148
  • Regulox
  • Regulox 36
  • Regulox 50 W
  • Regulox W
  • Retard
  • Royal MH-30
  • Royal slo-gro
  • Slo-Gro
  • Sprout-stop
  • Sprout/off
  • Stuntman
  • Sucker-stuff
  • Super de-sprout
  • Super sprout stop
  • Super sucker-stuff
  • Super sucker-stuff HC
  • Super-de-sprout
  • UNII-TQ7L3FCV66
  • Unriprim
  • Vondalhyde
  • Vondrax

Systematic Names

  • 3,6-Pyridazinedione, 1,2-dihydro-
  • Maleic hydrazide
  • Pyridazine-3,6-diol

Superlist Names

  • 1,2-Dihydro-3,6-pyridazinedione
  • 3,6-Pyridazinedione, 1,2-dihydro-
  • Maleic hydrazide
  • RCRA waste no. U148

Registry Numbers

CAS Registry Number

  • 123-33-1

FDA UNII

  • TQ7L3FCV66

Other Registry Numbers

  • 10071-13-3
  • 220787-04-2
  • 48100-18-1
  • 5425-79-6
  • 66988-32-7
  • 92335-53-0

System Generated Number

  • 0000123331

Structure Descriptors

InChI

1S/C4H4N2O2/c7-3-1-2-4(8)6-5-3/h1-2H,(H,5,7)(H,6,8)

InChIKey

BGRDGMRNKXEXQD-UHFFFAOYSA-N

Smiles

[nH]1[nH]c(ccc1=O)=O

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
duck LD50 oral > 10gm/kg (10000mg/kg)   Pesticide Manual. Vol. 9, Pg. 526, 1991.
quail LD50 oral > 10gm/kg (10000mg/kg)   Pesticide Manual. Vol. 9, Pg. 526, 1991.
rabbit LD50 skin > 4gm/kg (4000mg/kg)   World Review of Pest Control. Vol. 9, Pg. 119, 1970.
rat LC50 inhalation > 20gm/m3 (20000mg/m3)   Pesticide Manual. Vol. 9, Pg. 526, 1991.
rat LD50 oral 3800mg/kg (3800mg/kg)   World Review of Pest Control. Vol. 9, Pg. 119, 1970.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 306 deg C   EXP
pKa Dissociation Constant 5.67 (none) 25 EXP
log P (octanol-water) -0.84 (none)   EXP
Water Solubility 4510 mg/L 25 EXP
Vapor Pressure 2.77E-06 mm Hg 25 EST
Henry's Law Constant 2.65E-11 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 1.33E-11 cm3/molecule-sec 25 EST

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