| abstract |
1-Thiocarbamoyl-5-hydroxy-pyrazoles of the formula wherein R1 and R2 independently of one another hydrogen or optionally substituted alkyl, R³ Hydrogen or optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, alkoxycarbonyl, aralkyl or aryl, R⁴ Hydrogen or optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, alkylthio, aralkyl, aralkoxy, aralkylthio, aryl, aryloxy, arylthio, alkoxycarbonyl, alkoxycarbonylmethyl or aminoycarbonyl or R³ and R⁴ together represent a 1, ω-C₃-C₆-alk (en) ylene residue, have microbicidal activity and are therefore suitable for use in protecting materials. In contrast to other microbicides, they are ecologically harmless and do not discolour plastics, paints and paints, so they are particularly recommended for use in these substances. |