Tashiro's indicator
Tashiro's indicator is a pH indicator (pH value: 4.4–6.2), mixed indicator composed of a solution of methylene blue (0.1%) and methyl red (0.03%) in ethanol[1][2][3] or in methanol.[4]
| Tashiro's indicator (pH indicator) | ||
| below pH 4.4 | above pH 6.2 | |
| 4.4 | ⇌ | 6.2 |
Colours
- In acids: violet
- At equivalence point (pH 5.2): grey
- In bases: green
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See also
- Litmus
- pH Indicator
References
- Willmes, Arnold (2007). Taschenbuch Chemische Substanzen. Frankfurt am Main. ISBN 978-3817116621. Retrieved 30 March 2016.
- Tashiro’s indicator solution in ethanol
- SDS
- Tashiro’s indicator solution in methanol
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