Tashiro's indicator
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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 |
It can be used for the titration of ammonia in Kjeldahl analysis.[citation needed]
