A red-brown azo dye which becomes blue in acidic conditions, used as a chemical indicator and as a stain in histology.
刚果红（一种在酸性环境下呈蓝色的红褐色偶氮染料，用作化学指示剂和显微解剖学中的染色剂）
Example sentencesExamples
Potassium permanganate incubation caused loss of reactivity with Congo red.
All eyes studied that had characteristics of amyloid accumulation by hematoxylin-eosin staining were also stained with Congo red.
The presence of amyloid confirmed histologically by either Congo red or sulfonated Alcian blue stains or by electron microscopy was seen in 8 muscles.
The chemicals used in making Congo red and the other aniline dyes were primarily derived from the coal-tar waste products of the coal gas and steel industries in Germany's Ruhr Valley.
The term amyloid refers to proteinaceous, eosinophilic, amorphous material that when stained with Congo red produces a characteristic green birefringence under polarized light.
Definition of Congo red in US English:
Congo red
noun
A red-brown azo dye which becomes blue in acidic conditions, used as a chemical indicator and as a stain in histology.
刚果红（一种在酸性环境下呈蓝色的红褐色偶氮染料，用作化学指示剂和显微解剖学中的染色剂）
Example sentencesExamples
The chemicals used in making Congo red and the other aniline dyes were primarily derived from the coal-tar waste products of the coal gas and steel industries in Germany's Ruhr Valley.
Potassium permanganate incubation caused loss of reactivity with Congo red.
All eyes studied that had characteristics of amyloid accumulation by hematoxylin-eosin staining were also stained with Congo red.
The presence of amyloid confirmed histologically by either Congo red or sulfonated Alcian blue stains or by electron microscopy was seen in 8 muscles.
The term amyloid refers to proteinaceous, eosinophilic, amorphous material that when stained with Congo red produces a characteristic green birefringence under polarized light.