Detail of "16698-16-1"

Reference

Reactive azo reds

Reactive azo reds. Granosik, Jerzy; Drabik-Drabicki, Andrzej; Miskiewicz, Maria; Kopec, Krzysztof (Zaklady Przemyslu Barwnikow "Organika-Boruta", Pol.). Pol. PL 118353 B1 15 Aug 1983, 3 pp. (Polish). (Poland). CODEN: POXXA7. CLASS: IC: C09B062-026. APPLICATION: PL 79-212853 16 Jan 1979. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title dyes (I; R = Cl or residue of sulfanilic [121-57-3] or metanilic acid) are prepd. by coupling diazotized 2-amino-1-naphthalenesulfonic acid (II) [81-16-3] with di-Na 1-acetamido-8-hydroxy-3,6-naphthalenedisulfonate (III) [16698-16-1] in a nearly neutral medium, hydrolyzing the Ac group in a strongly basic medium, condensing the resulting aminoazo dye with cyanuric chloride (IV) [108-77-0], and isolating the dichlorotriazine dye (I; R = Cl) [25926-16-3] or condensing it with sulfanilic or metanilic acid. The mild coupling conditions reduce the decompn. of diazotized II and increase the reaction yield. Thus, 23.4 parts II was diazotized and coupled with 36.1 parts III at pH 7-7.5 (Na2CO3) and 8-10°, the product treated with 12 parts NaOH, heated at 80-85° for 2.5-3 h, cooled, and filtered, and the obtained aminoazo dye [65237-05-0] was condensed (60.In this experiment, several chemicals are used like 108-77-0 and 90179-34-3 6 parts) with 18.1 parts IV giving the dichlorotriazine dye (I; R = Cl) dyeing cellulosic fibers in light- and wetfast red color with bluish shade. .

Water-soluble dye preparations for manufacturing anionic azo dyes

Water-soluble dye preparations for manufacturing anionic azo dyes. Woerfel, Erhard; Landler, Josef (Hoechst A.In this experiment, several chemicals are used like 66056-51-7 -G., Ger.).In this study，66056-51-7 is also used. Ger. Offen. DE 2656503 15 Jun 1978, 27 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B067-00. APPLICATION: DE 76-2656503 14 Dec 1976. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Powd., H2O-sol. sol. dye precursor prepns. for anionic azo dyes which are storage stable consist of equimolar amts. of a diazo coupling component, diazotizable arom. amine, and NaNO2 with the components contg. free SO2H or CO2H groups and are used for dyeing cotton and wool. Thus, 1-(4-aminobenzamido)-3-(b-sulfatoethylsulfonyl)benzene [66056-51-7] 400, di-Na 1-acetamido-8-naphthol-3,6-disulfonate [16698-16-1] 400, and NaNO2 69 parts were milled together to provide a powd. compn. of which 87.4 parts was added to 1000 parts water. The water soln. was kept 30 min and cotton was padded with the soln., dried, and padded with alkali to give a red dyeing equiv. to dyeing with 77 parts of dye prepd. by the usual method. ..