Maleic hydrazide

Synonyms

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; Antergon; Antyrost; Burtolin; Chemform; De-cut; De-sprout; Drexel-super P; Fair 30; Fair PS; Fair plus; Fair-2; Fazor; Gotax; Hydrazid kyseliny maleinove [Czech]; Hydrazide maleique; Hydrazide maleique [ISO-French]; KMH; MAH; MG-T; MH; MH 30; MH 36 bayer; MH-40; Maintain 3; Malazide; Maleic acid cyclic hydrazide; Maleic acid hydrazide; Maleic hydrazide; Maleic hydrazine; Malein 30; Maleinsaeurehydrazid [German]; Malzid; Mazide; Milurit; N,N-Maleoylhydrazine; 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; Unriprim; Vondalhyde; Vondrax; [ChemIDplus]

Category

Plant Growth Regulators

Description

Colorless, crystalline solid; [HSDB] White solid; Formulated as emulsifiable concentrate and soluble concentrate (liquid and solid); [Reference #1]

Sources/Uses

Used as a herbicide and plant growth inhibitor, e.g., to control sucker growth on tobacco and to inhibit sprouting of potatoes and onions; [HSDB] A plant growth regulator and herbicide used to control sprouting of potatoes and onions, suckers in tobacco, and weeds, grasses, and trees in and along turf, ornamentals, public easements, and industrial and commercial land; [Reference #1]

Comments

Maleic hydrazide "may be hepatotoxic on ingestion." [Zimmerman, p. 393] The technical product is required to have no more than 15 ppm hydrazine contamination; The potassium salt (CAS# 28382-15-2) is also registered for use in the US; [Reference #1]

Reference Link #1

Biomedical References

2.77E-06 mm Hg

LC50 (rat) >20,000 mg/m3

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Not classifiable

Processes

Industrial Processes with risk of exposure:

• Farming (Pesticides)