Skip to Content
Medical Term:

butter yellow

Pronunciation: bŭt′er yel′ō


A fat-soluble yellow dye (MW 225) that has hepatic carcinogenic action in experimental animals; used as an indicator of pH (red, at pH 2.9, yellow at pH 4).

Synonym(s): dimethylaminoazobenzene, methyl yellow

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.