Bible Dictionaries
Congo Red

Webster's Dictionary

An artificial red dye from which the Congo group received its name. It is also widely used either in aqueous solution or as test paper (Congo paper) for the detection of free acid, which turns it blue.

Bibliography Information
Webster, Noah. Entry for 'Congo Red'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​c/congo-red.html. 1828.