Sulphuric Acid 19.2N is a standard titrant for use in volumetric analysis, ie for the determination of an unknown solution by reaction with a solution of known concentration. Sulphuric Acid 19.2N is a regulated explosives precursor (The control of poisons and explosives precursors regulations 2023) and a drug precursor class 3 (The law enforcement and security (amendment) (EU Exit) regulations 2019 No. 742).