• British Pharmacopoeia Volume IV
  • Appendices
  • Appendix I A. General Reagents

Methyl Red Mixed Solution
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Methyl Red Mixed Solution Dissolve 0.1  g of methyl red and 50  mg of methylene blue in 100  ml of ethanol (96%) .

Colour change pH 5.2 (reddish violet) to pH 5.6 (green).