Solochrome Cyanine

Eriochrome Cyanine R (C. I. Mordant Blue 3, Solochrome Cyanine R), a triphenylmethane dye, forms, in weakly acid solution, a violet lake with aluminum ions which is the basis of a spot test for the metal, One drop of the acidified sample is placed on a test plate and mixed with one drop each of Na acetate-acetic acid buffer solution (pH 5) and 1 % aqueous Eriochrome Cyanine R. The pH should be 4-6. One drop of NaHSOg solution is added. The formation of a violet color which is stable for 1 minute indicates the presence of aluminum. Iron i salts must first be reduced with ascorbic acid. Ti, Zr and Th ions form colored precipitates which must be centrifuged off. Cu must be masked with thioglycolic acid. 

This method is based on the bleaching action of fluoride ion content of the sample. The color of fhe red Zr-solochrome cyanine R (Aldrich Cat. No. 23,406-0, Sigma Prod. No. E2502) [52] complex fades as ZrOp2 is formed in the medium. As a matter of fact, no simple stoichiometric relationship exists between the fluoride and the zirconium complex with the dye. Therefore, in order to obfain reliable results, the reaction conditions need to be controlled very carefully. The absorbance of fhe reaction media is measured at 540 nm. The fluoride concenfrafion is evaluated using an absorbance-fluoride concentration calibration curve prepared with standard solutions. The method can be used for samples containing 0-2.5 pg fluoride. 

Carboxy-5-methyl-4-oxo-2,5-cyclohexadien-l-ylidene) 2-sulfophenyl)methy[ -2-hydroxy-3-methylbenzoic acid, 9CI. Mordant blue 3. Solochrome cyanine R. Chromoxane cyanine R. C.I. 43820 [2588-24-1]... 

Solbrol A, in H-OOl 13 Solochromate fast violet B, see H-00556 Solochrome azurine BS, S-00016 Solochrome black AS (free acid), see H-00224 Solochrome black 6BN, S-00017 Solochrome black PV, S-00018 Solochrome black RN, see S-00019 Solochrome black WDFA. see C-00278 Solochrome brilliant blue, see C-00277 Solochrome cyanine R, ee E-00013 Solochrome dark blue B, see E-OOOlO Solochrome fast blue B, in A-00225 Solochrome fast grey RA, S-00019 Solochrome fast grey RAS, see E-00014 Solochrome fast red, S-00020 Solochrome green V, see C-00132 Solochrome orange RS, see C-00289 Solochrome red B, S-00021... 

Solder analysis of by EDTA, (ti) 337 Solochrome black 317, 692 Solochrome (Eriochrome) cyanine R 678 Solochrome dark blue 318 Solubility product 24 calculations involving, 25 importance of, 26 principal limitations of, 24 Solution of sample 110 Solvents amphiprotic, 282 aprotic, 282 ionising, 18 non-protonic, 18 protogenic, 18, 282 protophilic, 282... 

N-Ac [3819-12-3]. Solochrome fast blue B. 8-Acetamido-2-(2-hydroxy-3f5,6-trichlorophenylazo)-l-naphthol 5-sulfonic acid. Eriochrome navy blue BRL. Metachrome brilliant blue BL. Metomega chrome cyanine BLL. C.L 17940. 

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