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

Litmus
scroll to previous hit
scroll to next hit

Litmus (1393-92-6) Fragments of indigo blue pigment prepared from various species of Rocella, Lecanora or other lichen.

Produces a red colour with acids and a blue colour in alkaline solutions (pH range, 5.0 to 8.0).