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US 8,784,505 B2Granted
1-hexzl-1H-pyrazole-4,5-diamine hemisulfate, and its use in dyeing compositions
AssigneeThe Procter & Gamble Company
InventorsWolfram Geibel, Ingo Weber, Armin Osan, Markus Speckbacher
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Abstract
1-hexyl-1H-pyrazole-4,5-diamine hemisulfate, as represented in formula (IX-a), and its use in oxidative dyeing composition. This pyrazole salt was found to combine good stability as raw material and good shade intensity with a range of common couplers when formulated in hair dyeing composition.
Claims4
A method for imparting improved color intensity as a result of dyeing human keratin fibers, the method comprising applying to human keratin fibers a composition comprising 1-hexyl-1H-pyrazole-4,5-diamine hemisulfate.
Dependencies are inferred from the claim text.