3-Formamidopropane-1-sulfonic Acid Sodium Salt is an intermediate for the synthesis of Calcium Bis(formyl Homotaurine) (C145040), is an acamprosate impurity. Acamprosate (A120000) is a synthetic amino acid and a neurotransmitter analogue that is used as an alcohol deterrent in management of alcohol dependence and abuse. Acamprosate was approved for use in the therapy of alcohol dependence and abuse in the United States in 2004.