Detail of "21951-34-8"

Reference

Water-soluble copper complex dyes

Water-soluble copper complex dyes. Hoyer, Ernst; Schlaeger, Ludwig (Hoechst A.-G., Ger.). Ger. Offen.There are some reagents with their cas registry numbers 121-47-1 and 62171-18-0 are used in this study. DE 2533250 27 Jan 1977, 22 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B062-74. APPLICATION: DE 75-2533250 25 Jul 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Reactive azo dyes (I, R = Me, CO2Me, CO2H; R1 = CH2CH2OH, CH2CH2Cl, CH:CH2, CH2CH2OSO3H, CH2CH2SSO3H, CH2CH2NEt2) were prepd. and used to dye cellulosic, polyamide, and polyurethane fibers fast yellow-brown shades. Thus, 2,4-H2N(HO3S)C6H3OH [98-37-3] was diazotized, coupled with 3-methyl-1-[4-(2-hydroxyethylsulfonyl)phenyl]-5-pyrazolone [21951-34-8], the azo deriv. [62147-46-0] sulfated and copperized to give 52% I (R = Me, R1 = CH2CH2OSO3H, 4-SO3H) [62171-30-6]. The other I were similarly prepd. .

Dyeing and printing of cotton and wool

Dyeing and printing of cotton and wool. Ikeda, Takuo; Yamamoto, Masakazu; Okuno, Masayoshi (Sumitomo Chemical Co., Ltd., Japan). Japan. JP 52021115 B4 8 Jun 1977 Showa, 6 pp. (Japanese). (Japan). CODEN: JAXXAD. CLASS: IC: C06P001-384. APPLICATION: JP 69-97713 4 Dec 1969. DOCUMENT TYPE: Patent CA Section: 39 (Textiles) Cotton dyed and printed yellow with 0.8% I (R = 6,8-disulfo-2-naphthyl, tri-K salt) (II) [28306-05-0] had color yield comparable to that dyed with 2% I (R = 1,5-disulfo- or 1-sulfo-2-naphthyl). 2-Aminonaphthalene-6,8-disulfonic acid [86-65-7] was diazotized, coupled with 1-[4-(2-hydroxyethylsulfonyl)phenyl]-3-methyl-5-pyrazolone [21951-34-8], salted with NaCl, sulfated, neutralized to pH 6, and salted with KCl to give II. Dyes which also showed good color yield were I (R = 3,6-disulfo-2-naphthyl) [64531-12-0], I (R = 6-sulfo-2-naphthyl) [64531-13-1], and I (R = 6-sulfo-1-naphthyl) [28306-09-4].