Terbuthylazine
NOMENCLATURE
Common name Terbuthylazine
IUPAC name N2-tert-butyl-6-chloro-N4-ethyl-1,3,5-triazine-2,4-diamine
Chemical Abstracts name 6-chloro-N-(1,1-dimethylethyl)-N'-ethyl-1,3,5-triazine-2,4-diamine
CAS RN [5915-41-3]
EEC no.
CONTROL OBJECT
Crop
Control object
PHYSICAL CHEMISTRY

Composition Tech. is96 % pure.  

Mol. wt. 229.7  

M.f. C9H16ClN5 

Form Colourless powder.  

M.p. 177-179 ºC 

V.p. 0.15 mPa (25 ºC) 

KOW logP = 3.21 (unionised) 

Henry 4.05×10-3 Pa m3 mol-1 (calc.) 

S.g./density 1.188 (20 ºC) 

Solubility In water 8.5 mg/l (pH 7, 20 ºC). In acetone 41, ethanol 14, n-octanol 12, n-hexane 0.36 (all in g/l, 25 ºC). 

Stability Stable in neutral, weakly acidic and weakly alkaline media; hydrolysed in acidic or alkaline media; DT50 (20 ºC) (calc.) 8 d (pH 1), 12 d (pH 13). In natural sunlight, DT50 >40 d.

 pKa 2.0, v. weak base 

F.p. >150 ºC

APPLICATIONGS
Photosynthetic electron transport inhibitor at the photosystem II receptor site. Maize tolerance of triazines is attributed to conjugation with glutathione. Biochemistry
Herbicide, absorbed mainly by the roots. Mode of action
Broad-spectrum pre- or post-emergence weed control in maize, sorghum, vines, fruit trees, citrus, coffee, oil palm, cocoa, olives, potatoes, peas, beans, sugar cane, rubber, and in forestry in tree nurseries and new plantings. It remains largely in the topsoil, controlling a wide range of weeds, at rates of 0.6-3 kg/ha; high rates are only recommended as band applications. In Europe, used mainly on maize and sorghum with a maximum application rate of 1.5 kg/ha, mainly in mixture with other herbicides. Uses
PRODUCT INFORMATION
Standard of technical material
Testing itemsStandard(w/w)
Content
Loss of drying
Water
Formulation type
content
Package
Mix with
Typical application rates