|Chemical Abstract Number (CAS #)||
||EPA Method 633|
Link to the National Library of Medicine's Hazardous Substances
Database for more details
on this compound.
|Use|| Control of many annual, biennial and perennial weeds and woody plants on noncropland
areas. Selective weed control in conifers, sugarcane, pineapple, rubber trees and alfalfa.
Contact and residual herbicide
Usage areas include plantations of coniferous trees, railroad right of ways, utilities, pipelines,
petroleum tanks, drainage ditches, and sugar, and alfalfa.
|Apparent Color|| White crystalline solid
|Melting Point|| 115-117 deg C
|Molecular Weight|| 252.36
|Sensitivity Data|| May irritate eyes, nose and throat.
|Environmental Fate|| TERRESTRIAL FATE: There is inadequate information concerning herbicide
persistence in soils of the boreal forest. A field study of herbicide behavior in an orthic
humo-ferric podzol began in the spring of 1983 of northeast central Newfoundland, Canada on a
south facing slope near Gambo pond. Hexazinone was applied on test plots within a clear cut
site. Under stringent controls the LF, Ae, Bf, Bc and soil horizons were sampled up to 486 days
after application. Residue analyses of samples from the soil horizons showed the distribution of
/hexazinone through the profile over time, and indicated the herbicide's propensity to leach and
persist. Results show that hexazinone leached to the Bf horizon, occasionally to the BC horizon
and rarely leach to the C horizon. More than 75% of the residues detected per sample period were
found in the organic layer. The results of the LF horizon indicated that 93% was the average
quantity detected per sample for hexazinone.
AQUATIC FATE: Hexazinone did not hydrolyze in water within the pH range of 5.7 to 9
during a period of 8 wk.
|Drinking Water Impact|| Hexazinone was measured in drainage water from 7 to 10 yr old plantations grown
with Abies nordmaniana, Spach on two clayey soils in Denmark. The concentrations of
hexazinone were different at the two locations, ranging from 0.07 to 2.09 ug/l at Bremersvold and
from 3.47 to 42.66 ug/l at Koege.