Methyl red is a pH indicator with range between 6.0 (yellow) and 4.4 (Red). It is used in IMViC test for detection of acid production from glucose fermentation.
| Ingredients | Formula / Litre |
| Methyl red | 0.200 gm |
| Ethyl alcohol | 60.000 ml |
| Distilled water | 40.000 ml |
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