| 单词 | congo red |
| 释义 | congo red [`käŋ·gō `red] ORGANIC CHEMISTRY C32H22N6Na2O6S2 An azo dye, sodium diphenyldiazo-bis-α-naphthylamine sulfonate, used as a biological stain and as an acid-base indicator; it is red in alkaline solution and blue in acid solution. |
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