Copper complex formazan compounds, process for their manufacture and their use as dyestuffs

摘要

This invention relates to novel copper complex formazan compounds of the formula in which M is hydrogen or the equivalent of a metal and R is hydrogen or chlorine. The invention also relates to a process for their manufacture. The compounds can be used as dyestuffs, in particular fiber reactive dyestuffs for dyeing cellulose fiber materials, wool, or synthetic polyamide fiber materials for example, on which they exhibit intense blue dyeings having good fastness properties.