ALL meanings of congo red
con·go red
C c - noun congo red a brownish-red soluble powder, used as a dye, a diagnostic indicator, a biological stain, and a chemical indicator. Formula: C32H22N6O6S2Na2 3
- noun congo red a sodium salt, C32H22O6N6S2Na2, used for dyeing wool and cotton and as an acid-base indicator: it becomes blue in an acid solution and remains red in an alkaline or neutral solution 3
- noun congo red a water-soluble powder, C 32 H 22 O 6 N 6 S 2 Na 2 , one of the Congo colors that is not acid-fast or lightfast: used chiefly as a dye, biological stain, and chemical indicator. 1
- noun congo red a dye that turns red in alkaline, blue in acidic solutions. 0