Maleic hydrazide
Names
IUPAC name
1,2-dihydropyridazine-3,6-dione
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ECHA InfoCard 100.004.201
EC Number
  • 204-619-9
KEGG
RTECS number
  • UR5950000
UNII
UN number 3082 3077
  • InChI=1S/C4H4N2O2/c7-3-1-2-4(8)6-5-3/h1-2H,(H,5,7)(H,6,8)
    Key: BGRDGMRNKXEXQD-UHFFFAOYSA-N
  • C1=CC(=O)NNC1=O
Properties
C4H4N2O2
Molar mass 112.088 g·mol−1
Hazards
GHS labelling:
GHS07: Exclamation markGHS08: Health hazard
Warning
H315, H319, H335, H341
P201, P202, P261, P264, P271, P280, P281, P302+P352, P304+P340, P305+P351+P338, P308+P313, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Maleic hydrazide, often known by the brand name Fazor is a plant growth regulator that reduces growth through preventing cell division but not cell enlargement.[1][2] It is applied to the foliage of potato, onion, garlic and carrot crops to prevent sprouting during storage.[3] It can also be used to control volunteer potatoes that are left in the field during harvesting.[4] It was first identified in the 1940s but was not used commercially in the United Kingdom until 1984. The banning of chlorpropham as a sprout suppressant in 2019 has led renewed interest in how maleic hydrazide can be used in potatoes.[5]

References

  1. ↑ Schoene, D. L.; Hoffmann, O. L. (1949-06-10). "Maleic Hydrazide, a Unique Growth Regulant". Science. 109 (2841): 588–590. Bibcode:1949Sci...109..588S. doi:10.1126/science.109.2841.588-a. PMID 17835381.
  2. ↑ Nooden, Larry D. (February 1969). "The Mode of Action of Maleic Hydrazide: Inhibition of Growth". Physiologia Plantarum. 22 (2): 260–270. doi:10.1111/j.1399-3054.1969.tb07375.x. hdl:2027.42/74891.
  3. ↑ "Peer review of the pesticide risk assessment of the active substance maleic hydrazide". EFSA Journal. 14 (6). June 2016. doi:10.2903/j.efsa.2016.4492.
  4. ↑ Buckley, Denis (August 2006). "Maleic Hydrazide in potato volunteer control" (PDF). British Potato Council. Retrieved 8 June 2021.
  5. ↑ Cunnington, Adrian (May 2019). "Maleic hydrazide as a potato sprout suppressant" (PDF). AHDB Potatoes. Retrieved 8 June 2021.


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