---
title: "Tashiro's indicator"
chunk: 1/1
source: "https://en.wikipedia.org/wiki/Tashiro's_indicator"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T11:30:05.843942+00:00"
instance: "kb-cron"
---

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.

 It can be used for the titration of ammonia in Kjeldahl analysis.


== Colours ==
In acids: violet
At equivalence point (pH 5.2): grey
In bases: green
Methylene blue functions to change the red-yellow shift of methyl red to a more distinct violet-green shift.


== See also ==
Litmus
pH Indicator


== References ==