| 单词 | congo red |
| 释义 | congo red (once / 590966 pages) n WORD FAMILY congo red USAGE EXAMPLESThe well-known dyes Congo Red and Bismarck Brown are azo compounds of complicated structure. Various, The New Gresham Encyclopedia. Vol....(2010) A weak solution of Congo red or methyl orange may be used. Sanford, P. Gerald (Percy Gerald), Nitro-Explosives: A Practical Treat...(2010) Charged the paper with a bismuth salt and iodide of soda in combination with primulin, congo red or other pigment. Carvalho, David Nunes, Forty Centuries of Ink—or, a chron...(2010) n a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions) Hyper acid-base indicator an indicator that changes color on going from acidic to basic solutions azo dyeany dye containing one or more azo groups |
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