Benzidine Dyes
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
This article describes benzidine dyes, which are produced by treating benzidine with nitrous acid. These dyes, which include Congo red and benzopurpurin, are commonly used in microtechnique for staining.
Encyclopedia entry (1928–1936)
BENZIDINE DYES are obtained from benzidine by treatment with nitrous acid. The tetrazo compounds formed in this manner, when combined with phenols and amines, yield yellow, red, blue, and violet dyes. In microtechnique, the most commonly used are Congo red (see) and benzopurpurin (see).
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Cite this page
“Benzidine Dyes.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/benzidine-dyes/