Detail of "13545-67-0"

Reference

Effect of an inorganic electrolyte on the interaction of methyl orange and its homologs with polycations containing various apolar groups

Effect of an inorganic electrolyte on the interaction of methyl orange and its homologs with polycations containing various apolar groups. Contribution of electrostatic and hydrophobic interactions. Takagishi, Toru; Imajo, Koichi; Kuroki, Nobuhiko (Univ. Osaka Prefect., Sakai, Japan). Sen'i Gakkaishi, 32(12), T-518-T-523 (Japanese) 1976. CODEN: SENGA5. DOCUMENT TYPE: Journal CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 66 The binding of Me orange (I) [547-58-0], Et orange [13545-67-0], and Pr orange [13545-68-1] by diallyldimethylammonium chloride-sulfur dioxide copolymer [26470-16-6], diallyldiethylammonium chloride-sulfur dioxide copolymer (II) [27577-32-8], and diallyldimethylammonium chloride-diallyl(dodecylbenzyl)methylammonium chloride-sulfur dioxide copolymer [54452-01-6] was studied in the presence of NaCl by equil. dialysis method, and the 1st binding consts. and thermodn. parameters for the binding were calcd. The 1st binding consts. decrease with increasing NaCl concn. and tend to approach a const. value above 1.0M NaCl, probably due to shielding of the elec. field around the binding system by NaCl and the competition between the dye anion and Cl- for loci for cationic attachment on the polymer mols. The electrostatic force for the binding of I by II was estd. 27577-32-8 and 13545-68-1 which are cas registry numbers of chemicals are mentioned. to be -3210 cal and the other binding forces -4980 cal, indicating the importance of hydrophobic interaction in addn. to the electrostatic one in the binding. The change in conformation of the polymer induced by the NaCl addn. and the effect of the conformational change on the binding forces are discussed. The intrinsic binding const. of the polycation for Cl- was evaluated from a binding isotherm for 2 competitive binding species, dye anion and Cl-. .

Color-changing perfume systems

Color-changing perfume systems. Munden, David Reginald (Unilever N. V., Neth.). Ger. Offen. DE 2729894 9 Feb 1978, 14 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: G01N031-22. PRIORITY: GB 76-27683 2 Jul 1976. DOCUMENT TYPE: Patent CA Section: 62 (Essential Oils and Cosmetics) Color changing perfume-releasing compns. contain an indicator and a volatile compd. (acids, bases,etc.). The compns. are 50% aq. emulsions absorbed by a porous carrier. The systems change color as the perfume is released into the atm., giving an indication of when the activity of the compn. is exhausted. The compns. are esp. useful as air fresheners. For example, a rose fragrance perfume compn. which changes color from blue to red to yellow comprised perfume 10, alc. 20, carbitol 20, H2CO (40% aq. 0.20, Triton X100 10.0, ethylorange [13545-67-0] 0.05, concd. HCl 2.5, and H2O up to 100%. After 6-7 days at ~27° the HCl evapd., the color had changed completely, and the perfume had all dissipated from the ceramic honeycomb container.