Pyrazole compounds and their salts (I), are new. Pyrazole compounds and their salts of formula (I), are new. Het : a 7 membered heteroaromatic residue with two heteroatoms as ring atoms, where the heteroatom in the ring is N and at least one N in the ring is bonded to the C atom of the pyrazole residue in 1st and 3rd position R 1>H or a hydrolyzable residue, preferably H, optionally substituted 1-30C-hydrocarbon, optionally substituted 1-30C-heterocycle residue, or a residue of formula SiR1aR1bR1c, NR1aR1b or N=CR1cR1d either R1a-R1d : H, or an optionally substituted hydrocarbon, where each of the residue R1a-R1d exhibits a 2-30C-substituent or R1aR1bN : optionally substituted 3-9-membered heterocycle, which in addition to the N, optionally contains one or two further heteroringatoms of N, O or S or R1cR1dC : optionally substituted 3-9-membered carbocyclic residue or a heterocyclic residue, which can contain 1-3 heteroring atoms of N, O or S either R 2>, R 3>H, halo or (1-6C)alkyl (which is optionally substituted by one or more halo, (1-4C)-alkoxy, (1-4C)-alkylthio or (1-4C)-Haloalkoxy) or R 2>R 3>C : a saturated or partially unsaturated carbocyclic 3-6C-ring, which is optionally substituted by one or more halo or (1-4C)-alkyl R 4>(1-6C)-alkyl, (2-6C)-alkenyl or (2-6C)-alkynyl (all optionally substituted by one or more halo, CN, OH, (1-4C)-alkoxy, (1-4C)-haloalkoxy, (1-4C)-alkoxy-(1-4C)-alkoxy, (1-4C)-alkylthio or (3-9C)-cycloalkyl (which is optionally substituted by halo, CN, (1-4C)-alkyl or (1-4C)-haloalkyl) or preferably optionally substituted by halo, CN, (1-4C)-alkoxy, (1-4C)-haloalkoxy, (1-4C)-alkoxy-(1-4C)-alkoxy, (1-4C)-alkylthio or (3-9C)-cycloalkyl (which is optionally substituted by halo, CN, (1-4C)-alkyl or (1-4C)-haloalkyl)), or (3-9C)-cycloalkyl, (5-9C)-cycloalkenyl or (5-9C)-cycloalkynyl (all optionally substituted by halo, (1-4C)-alkyl, (1-4C)-haloalkyl, (2-4C)-alkenyl, (2-4C)-alkynyl, (1-4C)-alkoxy, (1-4C)-haloalkoxy or (1-4C)-alkylthio), phenyl (wh
