Reference

Purification of bromoxanthenic dyes by chromatography with the ion exchanger DEAE Trisacryl M

Purification of bromoxanthenic dyes by chromatography with the ion exchanger DEAE Trisacryl M. Fompeydie, D.; Levillain, P. (Lab. Chim. Anal., UER Sci. Pharm. Biol., Paris 75006, Fr.). J. Chromatogr., 294, 499-503 (French) 1984. CODEN: JOCRAM. ISSN: 0021-9673. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 80 Mixts. of fluorescein [2321-07-5], 4-bromofluorescein [25709-80-2], 4,5-dibromofluorescein [596-03-2], 2,4,5-tribromofluorescein [25709-83-5], and eosin [17372-87-1] can be sepd. by ion-exchange chromatog. on DEAE Trisacryl M [80701-61-7]. Samples as large as ~1 g are sepd. by this method, the purity of each fraction is high, and the recovery is ~95%.

Hair dyes containing levulinic acid

Hair dyes containing levulinic acid. (Hoyu Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 60028913 A2 14 Feb 1985 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: A61K007-13. APPLICATION: JP 83-136086 26 Jul 1983. DOCUMENT TYPE: Patent CA Section: 62 (Essential Oils and Cosmetics) Hair direct dyes (pH ~ 1.5-4.5) contain 5 to ~25% levulinic acid [123-76-2] and dyes selected from the following groups of compds.: triphenylmethane, azo, quinoline, thiazole, xanthene, indigoid, acridine, azine, stilbene, oxazine, and anthraquinone. These dyes are nonirritating and produce smooth and lustrous hair. Thus, a black dye comprises Japan Black 401 (di-Na 8-amino-7-(p-nitrophenyl)azo-2-phenylazo-1-naphthol-3,6-disulfonate) [1064-48-8] 0.5, Japan Orange 201 [Na 4-(p-sulfonyl)azo-(2,4-xylylazo)-1,3-resorcinol] [596-03-2] 0.1, Japan Red 2 ([1-(4-sulfo-1-naphthylazo)-2-naphthol-3,6-disulfonate] [915-67-3] 0.1, benzyl alc. 5.0, levulinic acid 10.0, H3PO4 1.0, hydroxyethyl cellulose 1.0, and H2O 82.3% by wt (pH 3.0).