Detail of "5850-93-1"

Reference

Behavior of sulfonated acid dyes in solution

Behavior of sulfonated acid dyes in solution. Aboul-Fetouh, M. S.; El-Mariah, Afaf A. R.; Salem, K. M. (Al-Azhar Univ., Cairo, Egypt). Indian Text. J., 87(6), 163, 165, 167, 169, 171 (English) 1977. CODEN: INTJAV. DOCUMENT TYPE: Journal CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) The relative viscosity, the sp. viscosity (.eta.sp), and .eta.sp/C, where C is the concn. of three azonaphthalenesulfonic acid dyes C.I. Acid Red 141 [5850-93-1] (monosulfonic), C.I. Acid Red 17 [5858-33-3] (disulfonic), and C.I. Acid Red 18 [2611-82-7] (trisulfonic), were detd. and a straight line relation between .eta.sp/C and C and between log viscosity and 1/temp. was demonstrated. The shape factor for the dyes were calcd. and indicated that the dyes are present as random linear chains.

An amperometric study of the aggregation of some acid dyes

An amperometric study of the aggregation of some acid dyes. El-Mariah, Afaf A.; Kafafi, Zakya; Moussa, Eglal A. (Chem. Dep., Al-Azhar Univ., Cairo, Egypt). Indian J. Chem., Sect. A, 23A(11), 904-6 (English) 1984. CODEN: IJCADU. ISSN: 0376-4710. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Diffusion coeffs. of mono-, di-, and trisulfonated dyes, i.e. C.I. Acid Red 88 [1658-56-6], C.I. Acid Red 27 [915-67-3], C.I. Acid Red 141 [5850-93-1], and C.I. Acid Red 13 [2302-96-7], were calcd. from their diffusion-controlled limiting currents in buffers in aq. and mixed solvent systems, and mol. wts. of the aggregated dyes were obtained from these values. The results were interpreted in terms of a monomer-dimer equil. The dimerization const. decreased upon addn. of org. solvents, indicating that org. solvents cause deaggregation. The aggregation no. increased on decreasing the temp., even for dil. solns.; accordingly, the value for the dimerization const. increased. Thermodn. properties for aggregation were also detd.