28 lines
720 B
Markdown
28 lines
720 B
Markdown
---
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title: "Tashiro's indicator"
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chunk: 1/1
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source: "https://en.wikipedia.org/wiki/Tashiro's_indicator"
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category: "reference"
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tags: "science, encyclopedia"
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date_saved: "2026-05-05T11:30:05.843942+00:00"
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instance: "kb-cron"
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---
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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 or in methanol.
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It can be used for the titration of ammonia in Kjeldahl analysis.
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== Colours ==
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In acids: violet
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At equivalence point (pH 5.2): grey
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In bases: green
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Methylene blue functions to change the red-yellow shift of methyl red to a more distinct violet-green shift.
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== See also ==
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Litmus
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pH Indicator
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== References == |