Detail of "91-25-8"

Reference

Metal-containing dyes

Metal-containing dyes. Ramsay, David W. C.; Young, Elliott (Imperial Chemical Industries Ltd., Engl.). Ger. Offen. DE 2623775 9 Dec 1976, 31 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B050-00. PRIORITY: GB 75-23337 28 May 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Reactive formazan dyes (I, R = Ph, HO3SC6H4, CN; X = O, CO2) were prepd. and used to dye cellulosic fibers fast blue shades by baking with a carbodiimide. Thus, 2-HO3SC6H4CHO [91-25-8] was added to 2,5-HO(HO3S)C6H3NHNH2.HCl [61810-02-4] in H2O contg. NH4OH, the reaction mixt. held at pH 5 for 2 h, 2,5-HO(H2O3P)C6H3N2+ [61810-03-5] and CuSO4 sulfate added, and the reaction mixt. held at pH 5 for 6 h to give I (R = 2-HO3SC6H4, X = O; 3-SO3H) [61817-35-4]. The other I were similarly prepd.Except for chemicals metioned above, 61817-33-2 and 61817-35-4 are also used. .

Bath and process for high speed nickel electroplating

Bath and process for high speed nickel electroplating. Rosegren, Donald R.; Mayer, Linda J. (Occidental Chemical Corp.Several substances are used for example 91-25-8 and 7440-02-0 which are their cas registry numbers., USA). U.S. US 4411744 A 25 Oct 1983, 3 pp. Cont.-in-part of U.S. Ser. No. 199,894 abandoned. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C25D003-12. NCL: 204049000. APPLICATION: US 82-407662 16 Aug 1982. PRIORITY: US 80-199894 23 Oct 1980. DOCUMENT TYPE: Patent CA Section: 72 (Electrochemistry) An improved process using insol. Ni anodes is described. The bath contains: NiSO4 75 (as Ni), H3BO3 40, o-formylbenzenesulfonic acid 1.5 and K perfluorocyclohexylsulfonate 0.1 g/L. Prior to use NiCO3 was added to the bath to adjust the pH to ~2.5. The bath was operated at 55° using 500 A/ft2 to electroplate Cu. Semi-bright and ductile plates were obtained. No breakdown of the org. additives was found. .