Congo Red

nounverified·updated May 18, 2026

a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)

Framework senses

2 senses across 2 frameworks

Wordset Dictionary1 senseview framework →

§1: a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)

Legacy lexicon import1 senseview framework →

§1 · legacy_primary: a red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions)
DR-088 backfill from the noun definition column