antiracemate
/ˌæntɪˈræsɪmeɪt, æntɪˈreɪsiːmeɪt/Definitions
1. noun
a compound that prevents a mixture of liquids from separating into its component parts, especially a racemic mixture of a compound into its d- and l- enantiomers.
“The chemist used an antiracemate to stabilize the mixture and prevent its components from separating.”