Dye for hair coloration, composition for hair coloration containing dye, and method for producing dye

A dye for hair coloration that has a long shelf life and is excellent in heat resistance, and a method for producing the dye for hair coloration, are provided. A dye for hair coloration represented by the following general formula (1), the dye for hair coloration having a proportion of a polyatomic...

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Bibliographische Detailangaben
Hauptverfasser:	Tetsuya Yoshida, Keigo Naito
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC CHEMISTRY PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS
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Beschreibung
Zusammenfassung:	A dye for hair coloration that has a long shelf life and is excellent in heat resistance, and a method for producing the dye for hair coloration, are provided. A dye for hair coloration represented by the following general formula (1), the dye for hair coloration having a proportion of a polyatomic anion (An) or impurities derived from An of 1% by mass or less:wherein in the formula (1), D represents a cationic moiety of the dye for hair coloration; An represents a polyatomic anion; and a and b each independently represent a value of 0 to 1.