| 摘要 |
<p>The invention relates to 1/2 chromium complex dyestuffs of the formula: <CHEM> where M, M min and M sec are the same or different and each represent a hydrogen cation or one equivalent of a colourless cation. The complexes of the invention can be used to colour nitrogenous materials, wood and varnishes in very dark brown shades.</p> |
