N2-tert-butyl-6-chloro N4-ethyl-1,3,5-triazine-2,4-diamine
CAS RN / EEC No. / Index no.
[5915-41-3] / 227-637-9
Molecular formula / Molecular weight
C9H16CIN5 / 229,7

Mode of Action and uses

Terbuthylazine is a triazine selective systemic herbicide absorbed principally through the roots, but also through the foliage, with translocation acropetally in the xylem and accumulation in the apical meristems and leaves. It is used in pre- and early post-emergence control of annual broad-leaved weeds in maize, sorghum, top fruits, citrus, grape, olive, conifers, industrial weed control.

Terbuthylazine binds to the plastoquinone-binding protein in photosystem II, inhibiting electron transport.

Technical product

96% A.I. min.


  1. Straight products (outside Europe): 500 g/L Suspension Concentrate and 75% Wettable Granules.
  2. Ready mixtures:
    • Terbuthylazine 214 g/L+Acetochlor 450 g/L Suspo Emulsion (Ukraine)
    • Terbuthylazine 250 g/L+Dimethenamid-p 300 g/L SE (South Europe, Hungary and Romania)

Main Trademarks

Click Combi, Astrel Plus, Terbyna

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