Benzopurpurin
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Benzopurpurin is a group of dyes formed from diazotized toluidine and naphthylaminesulfonic acid, available in various commercial grades as brown-red powders. In histological technique, certain grades of benzopurpurin serve as an excellent counterstain for plasma after staining with hematoxylins.
Encyclopedia entry (1928–1936)
BENZOPURPURIN, Benzopurpurin, a group of dyes formed from diazotized toluidine and naphthylaminesulfonic acid. Commercial grades of benzopurpurin bear marks from B to 10B and are brown-red powders, soluble in water with an orange-red (B) or purple (10B) color. Benzopurpurin (commercial grades B and 6B) serves as an excellent counterstain for plasma after staining with hematoxylins.
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“Benzopurpurin.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/benzopurpurin/