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Priority to JP1986036432UpriorityCriticalpatent/JPH0134320Y2/ja
Publication of JPS62148082UpublicationCriticalpatent/JPS62148082U/ja
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Publication of JPH0134320Y2publicationCriticalpatent/JPH0134320Y2/ja
Use, as a coupler, of 2,4-diamino-1,3-dimethoxybenzene or one of its salts, in combination with oxidation dye precursors, for dyeing human hair, hair dyeing composition containing the said coupler and process for preparing the said coupler