申请人:——
公开号:US20040254356A1
公开(公告)日:2004-12-16
1:2-metal complex dyes of the formula
1
wherein the sympols R
1
, R
1
′, R
2
, R
2
′, R
3
, R
3
′, Y, Z, n, n′, Me, M and (Kat)
+
are defined as in the Claims, mixtures thereof, their compositions, their production and their use as anionic dyes for dyeing substrates, especially leather, in brown to red shades.