Metribuzin

Metribuzin

Names
IUPAC name 4-Amino-6-tert-butyl-3-methylsulfanyl-1,2,4-triazin-5-one
Other names 4-Amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one
Identifiers
CAS Number	21087-64-9
3D model (JSmol)	Interactive image
ChEBI	CHEBI:34846 Y
ChemSpider	28287
ECHA InfoCard	100.040.175
PubChem CID	30479
InChI InChI=1S/C8H14N4OS/c1-8(2,3)5-6(13)12(9)7(14-4)11-10-5/h9H2,1-4H3 Key: FOXFZRUHNHCZPX-UHFFFAOYSA-N InChI=1/C8H14N4OS/c1-8(2,3)5-6(13)12(9)7(14-4)11-10-5/h9H2,1-4H3 Key: FOXFZRUHNHCZPX-UHFFFAOYAI
SMILES CC(C)(C)C1=NN=C(N(C1=O)N)SC
Properties
Chemical formula	C8H14N4OS
Molar mass	214.29 g·mol−1
Appearance	Colorless, crystalline solid
Density	1.31 g/cm3
Melting point	125 °C (257 °F; 398 K)
Solubility in water	0.1% (20 °C)
Vapor pressure	0.0000004 mmHg (20 °C)
Hazards
US health exposure limits (NIOSH):
PEL (Permissible)	none
REL (Recommended)	5 mg/m3
IDLH (Immediate danger)	N.D.
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Metribuzin (4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5(4H)-one) is an herbicide used both pre- and post-emergence in crops including soy bean, potatoes, tomatoes and sugar cane. It acts by inhibiting photosynthesis by disrupting photosystem II. It is widely used in agriculture and has been found to contaminate groundwater.