SPECTRUM

Chemical Fact Sheet

Chemical Abstract Number (CAS #) 51235042
CASRN 51235-04-2
SynonymsHexazinone
1,3,5-Triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-
Velpar
3-Cyclohexyl-6-(dimethylamino)-1-methyl-s-triazine-2,4-(1H,3H)-dione
Analytical Method EPA Method 633
Molecular FormulaC11H20SO2N3

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
Odor Odorless
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.

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