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

Bromothymol Blue Solution R3
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Bromothymol Blue Solution R3 Warm 0.1  g of bromothymol blue with 3.2  ml of 0.05m sodium hydroxide and 5  ml of ethanol (90%). After solution is effected, add sufficient ethanol (90%) to produce 250  ml.