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CAS number 51235-04-2 YesY
PubChem 39965
ChemSpider 36542 N
KEGG C10926 N
Jmol-3D images Image 1
Image 3
Molecular formula C12H20N4O2
Molar mass 252.31
Appearance White crystalline solid
Density 1.25 g/cm3
Melting point 116 °C (241 °F; 389 K)
Solubility in water Soluble
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Hexazinone is an organic compound that is used as a broad spectrum herbicide. It is a colorless solid. It exhibits some solubility in water but is highly soluble in most organic solvents except alkanes. A member of the triazine class herbicides, it is manufactured by DuPont and sold under the trade name Velpar.[1]

It functions by inhibiting photosynthesis and thus is a nonselective herbicide. It is used to control grasses and broadleaf and woody plants. Approximately 33% is used on alfalfa, 31% in forestry, 29% in industrial areas, 4% on rangeland and pastures, and < 2% on sugarcane.[2]

In 1989, hexazinone was deliberately used in an act of vandalism to poison the Treaty Oak in Austin, Texas.

Hexazinone is a pervasive groundwater contaminant, due to its high water solubility.


  1. ^ Arnold P. Appleby, Franz Müller, Serge Carpy “Weed Control“ in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a28_165
  2. ^ Hexazinone, Herbicide Profile, Pesticide Management Education Program, Cornell University

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