congo red

Noun
  1. A red-brown azo dye especially as a chemical pH indicator (congo red is red in basic and blue in acidic solutions) (synset 114794792)
    referred to in: solution - a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution
    is a type of:
    • acid-base indicator - an indicator that changes color on going from acidic to basic solutions
    • azo dye - any dye containing one or more azo groups

Found on Word Lists

Other Searches