This invention is directed to bis alkanols and salts thereof and to compositions of the developer coupler type for the dyeing of hair, consisting essentially of bis alkanols or salts thereof as coupling components and, as {HEAD ~ developer components}, the conventional components used in {TAIL ~ oxidation} dyes 
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This invention is directed to bis alkanols and salts thereof and to compositions of the developer coupler type for the dyeing of hair , consisting essentially of bis alkanols or salts thereof as coupling components and , as { HEAD ~ developer components } , the conventional components used in { TAIL ~ oxidation } dyes
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