Of the triphenylmethane indicators bromothymol blue, thymol blue, bromocresol green, phenolphthalein and thymolphthalein, and the azo-dye methyl red, only thymol blue showed a promising colour change from light tan (dry) to deep blue (dry) in the required pH range. Drawbacks to be overcome ...
Based on this theory, the proposed model was verified with the 3,3′-bis[bis(carboxymethyl)amino]methyl derivatives of sulphonephthalein dyes such as xylenol orange (XO), methylthymol blue (MTB), and methylxylenol blue (MXB), which can bind two metal ions at both ends of a π-electron...
from the sulphophthalein, phthalein and azo dyestuff gp., esp. bromothymol blue, thymol blue, bromocresol green or a salt of these (chloride, sulphate, phosphate or salt of other strong, nonvolatile inorganic or organic acids or ion exchangers). This consists of a button or flag that can...
of a fat or fat-contg. food the redox indicator is bromothymol blue (3,3'-dibromothylmol-sulphone-phthalein), bromocresol green (3,3',5,5'-tetrabromo-m-cresol-sulphonephthalein), cresol-indophenol (benzoquinone-(1,4)-mono 4-oxy-2-methylanil ) and/or thymol-indophenol (benzoquinone-...
from the sulphophthalein, phthalein and azo dyestuff gp., esp. bromothymol blue, thymol blue, bromocresol green or a salt of these (chloride, sulphate, phosphate or salt of other strong, nonvolatile inorganic or organic acids or ion exchangers). This consists of a button or flag that can...