Reference

Substituted nitroaminophenols useful as dyes for keratin fibers

Substituted nitroaminophenols useful as dyes for keratin fibers. Bugaut, Andree; Andrillon, Monique (Oreal S. A., Fr.). Ger. Offen. DE 2717766 3 Nov 1977, 32 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07C091-06.In this experiment, several chemicals are used like 610-81-1 PRIORITY: LU 76-74807 21 Apr 1976. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Nitroaminophenols (I, R, R1 = H, C1-4 alkyl) are prepd. and used in hair dyeing compns. contg.In this study，610-81-1 is also used. ammoniacal H2O2 solns., providing red shades needed for mahogany and copper red shades. Thus, 3-nitro-4-aminophenol [610-81-1] was treated with chloroethyl chloroformate [627-11-2] in the presence of CaCO3 and the resulting 2-chloroethyl N-[(2-nitro-4-hydroxy)phenyl]carbamate [65235-20-3] treated with aq. KOH to give I (R = R1 = H) [65235-31-6]. ..

Method for dying hair with oxidative hair dyes

All Rights Reserved. Method for dying hair with oxidative hair dyes. Hoeffkes, Horst; Hollenberg, Detlef; Kleen, Astrid; Meinigke, Bernd ( Henkel K.-G.a.A., Germany). Ger.Some commonly used reagents like 81329-90-0 and 65235-31-6 are used in this experiment. Offen. DE 102005034146 A1 25 Jan 2007, 25pp. (German). (Germany). CODEN: GWXXBX. APPLICATION: DE 2005-102005034146 19 Jul 2005. DOCUMENT TYPE: Patent CA Section: 62 (Essential Oils and Cosmetics) The invention concerns a method for dying hair by: (a) applying an oxidative dye precursor with max. 1 wt./wt.% oxidative agent content (expressed as 100% hydrogen peroxide) and leaving the compn. on the hair for 1-40 min, preferably for 5-20 min; (b) applying an oxidative agent compn. with min. 1 wt./wt.% oxidative agent (expressed as 100% hydrogen peroxide) and leaving the compn. on the hair for 1-40 min, preferably for 3-25 min. Aerosols and foam aerosols can be prepd. No formulation example is given. .