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

Tetrazolium Blue
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Tetrazolium Blue Blue tetrazolium salt; 3,3′-(3,3′-dimethoxy-4,4′-biphenylylene)bis(2,5-diphenyl-2H-tetrazolium chloride); C40H32Cl2N8O2  =  727.7 (1871-22-3)

General reagent grade of commerce.

Yellow crystals; melting point, about 245°, with decomposition.