EpicentRx Word of the Week: Mother Liquor

Oct 9, 2023

“Word to your Mother”.

Vanilla Ice—Ice, Ice Baby

Mother Liquor noun

Variants mother water, mother liquid, spent liquor

Synonym supernatant

muthr likr

Definition: the portion of a solution that remains after filtration or crystallization

Example sentences:

“Active pharmaceutical ingredient (API) separation from the synthesis and crystallization mother liquor is typically carried out through filtration and drying”.

“Sugar crystals are separated from the mother liquor by centrifuging”.

“Molasses is the mother liquor left after sugar crystals are separated from it during sugar manufacture”.


The synthesis of nibrozetone (RRx-001) involves a final crystallization step that leaves a residual mother liquor. 

Origin of the Word: