indigodisulfonic acid
noun
in·di·go·disulfonic acid
: a water-soluble disulfonic acid C16H8N2O2(SO3H)2 obtained by treating indigo with concentrated sulfuric acid
called also indigo extract, 5,5′-indigotindisulfonic acid
Word History
Etymology
indigodisulfonic International Scientific Vocabulary indigo + disulfonic