thymol blue


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thymol blue

[thī‚mȯl ′blü]
(organic chemistry)
C6H4SO2OC[C6H2(CH3)(OH)CH(CH3)2]2 Brown-green crystals soluble in alcohol and dilute alkalies, insoluble in water, decomposes at 223°C; used as acid-base pH indicator.
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Quotation For are invited for Consumable & Non-Consumable1.1.Alkaline peptone water lOOgm,Bile esculin agar base 500gm,.Esculin 5vl (0.5gm per vial),Brain heart infusion broth 500gm,C.L.E.D agar w/ Bromo thymol blue 500gm,MacConkey agar w / 0.15% bile salts, CV and NaCL 500gm etc...
The common indicator solutions include thymol blue, methyl orange, bromthymol blue, phenolphthalein, and bromphenol blue.
In an effort to understand the extent of impurities in these dyes and the potential impact on the expanded uncertainty of spectrophotometric pH measurements, we have examined seven commercially available sulfonephthalein pH indicators using liquid chromatography-mass spectrometry (LC-MS): bromocresol green (BCG), bromocresol purple (BCP), bromothymol blue (BTB), cresol red (CR), meta-cresol purple (MCP), phenol red (PR), and thymol blue (TB).
A 1mM standard solution of methyl thymol blue was prepared by dissolving a calculated quantity of the A.R.