Reference

Copper disazo dyes containing phosphonic acid groups

Copper disazo dyes containing phosphonic acid groups. Andrew, Herbert Francis; Price, Raymond; Stead, Cecil Vivian (Imperial Chemical Industries Ltd., Engl.). Brit. GB 1504167 15 Mar 1978, 10 pp. (English). (United Kingdom). CODEN: BRXXAA. CLASS: IC: C09B045-28. APPLICATION: GB 75-19127 7 May 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 29, 25 The prepn. is described of title dyes I (X, X2 = benzene or naphthalene residue having the N:N and (CO)O substituents at positions 1 and 2; X1 = residue of coupling component contg. 2 OH groups and capable of coupling ortho to both; n, m = 0, 1; 31 of X and X2 contains the group (CH2)xP(O)(OH)2 (x = 0-4). Thus, a dye [59989-23-0], prepd. by coupling diazotized 4,3-(HO)(H2N)C6H3P(O)(OH)2 [59785-86-3] with 5,5'-dihydroxy-2,2'-dinaphthylurea-7,7'-disulfonic acid [134-47-4] followed by stirring with CuSO4, dyed cellulose textiles wetfast very blue-red.

A disazo dye derived from J-acid urea

A disazo dye derived from J-acid urea. Armitage, John Leslie; Backhouse, Brain Stuart; Komander, Alfons Anzelm (Imperial Chemical Industries Ltd., Engl.). Brit. GB 1477161 22 Jun 1977, 3 pp. (English). (United Kingdom). CODEN: BRXXAA. CLASS: IC: C09B033-04. APPLICATION: GB 74-624 7 Jan 1974. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 43 Water-sol. azo dye I [65213-62-9], which dyed paper a yellowish-scarlet color, was prepd. by coupling one mol of diazotised 2-naphthylamine-6-sulfonic acid [93-00-5] and one mol diazotised 4-amino-3-methylbenzenesulfonic acid [98-33-9] with one mol 6,6'-ureylenebis(1-naphthol-3-sulfonic acid) [134-47-4] in the presence of triethanolamine [102-71-6].