Chemie Linz Aktiengesellschaft

Engelbert Kloimstein

Rupert Schonbeck

Hubert Mayr

Engelbert Auer

Alfred Diskus

Erwin Wittmann

Amine salts of 3-phenyl-6-halo-4-hydroxypyridazines of the formula: ##STR1## in which X is a chlorine or bromine atom, R.sub.1 is an alkyl group containing up to 14 carbon atoms, which group may be substituted by a hydroxy group, an alkoxy group containing up to 10 carbon atoms, cyano group, amino group or lower mono- or lower dialkylamino group, an alkenyl group containing up to 6 carbon atoms or a cycloalkyl group containing 5, 6 or 7 carbon atoms, and R.sub.2 and R.sub.3 have the same meaning as R.sub.1 or each is a hydrogen atom, or R.sub.1 and R.sub.2 together with the nitrogen atom of the amine form a 5- or 6-membered heterocyclic group which may also contain oxygen and which may be mono- or di- substituted by alkyl, and herbicidal compositions containing them.

Amine salts of phenyl-4-hydroxypyridazines and the preparation and

Phenylpyridazines of the general formula: ##SPC1## In which Hal is a chlorine or bromine atom, R is a straight-chain or branched alkyl group containing 1 to 18 carbon atoms or a phenyl group, and X and Y separately are oxygen or sulphur, but not both oxygen, a process for their preparation and herbicidal compositions containing them.

3-Phenyl-6-halo-pyridazinyl thio-and dithio-carbonates

Phenylpyridazine compounds of the general formula ##SPC1## In which Hal is a chlorine or bromine atom and R is a straight-chain or branched alkyl group containing 2 to 20 carbon atoms when Hal is chlorine and 1 to 20 carbon atoms when Hal is bromine, or is the group --OR', wherein R' is an alkyl group of 1 to 18 carbon atoms which may be straight-chain or branched, and which have valuable herbicidal properties.

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Engelbert Kloimstein