Toxno Substance Profile
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Substance Name

Maleic hydrazide
Identification Number: CASRN | 123-33-1

  Substance Attributes


  • Carcinogenic Properties

    Accumulating evidence points to cancer potential. Exercise caution with this substance, explore your exposure routes and consider complete avoidance. See further details under Toxins.

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  • CATEGORIES: Pesticide | Industrial/Workplace Toxin | Synthetic Toxin | PESTICIDE active ingredient | organic | plant growth regulator | Pesticide or Plant Growth Regulator Approved in Australia | Pesticide approved in USA (California) | Pesticide approved or pending approval in EU
  • SUBSTANCE LINEAGE: Organic Compounds | Heterocyclic Compounds | Diazines | Pyridazines and Derivatives | Pyridazinones
  • SYNONYMS: 1,2,3,6-Tetrahydro-3,6-dioxopyridazine | 1,2-Dihydro-3,6-pyridazinedione | 1,2-dihydropyridazine-3,6-dione | 3,6-Dihydroxypyridazine | 3,6-Pyridazinediol | Antergon | Antyrost | Burtolin | cis-Butenedioic acid hydrazide | De-cut | De-sprout | Drexel-super P | Fair plus | Fazor | Gotax | Maintain 3 | Malein 30 | Malepin | Malzid | Mazide | Milurit | N,N-Maleoylhydrazine | Regulox | Retard | Sorbatran | Sprout-stop | Sucker-stuff | Super-de-sprout | Unriprim | Vondrax
  • DESCRIPTION: Maleic hydrazide (MH) was introduced into agriculture in the 1950s as a major commercial herbicide and a depressant of plant growth. It is a plant growth regulator (sprout inhibitor) and herbicide, that acts by inhibiting cell division in plants. It is used to control sprouting of potatoes and onions, suckers in tobacco, and growth of weeds, grasses and trees in/along lawns, turf, ornamental plants, non-bearing citrus, utility and highway rights-of-way, airports and industrial land. Most of the maleic hydrazide used in the U.S. is applied to tobacco (86-88%), followed by potatoes (10%), It is used to control sucker growth on tobacco plants, retardation of flowering and prolongation of dormancy period.
  • COMMENTS: Residues of this pesticide are tested for on Australian Foods | Pesticide approved in Australia
  • toxin chemical structure pubchem
  • FORMULA: C4H4N2O2
  • DATA SOURCES: DATA SOURCES: T3DB | PubChem | IARC | Consolidated Pesticide Information Dataset (CPI) from the USA EPA | Compendium of Pesticide Common Names | APVMA | DPR | EU Pesticides
  • LAST UPDATE: 28/04/2018

  Health Associations

Mostly focused on Health Implications of Long Term Exposure to this substance

  • SYMPTOMS:
  • POSSIBLE HEALTH CONSEQUENCES:
  • ACTION OF TOXIN:
  • TOXIN SITES OF ACTION IN CELL: "Cytoplasm", "Extracellular"
  • Additional Exposure Routes: This is a man-made compound that is used as a pesticide.

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  Exposure Routes

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