Sulphuric Acid 50% is a mineral acid. A mineral acid or inorganic acid, is an acid obtained from one or more inorganic compounds. Sulphuric Acid 50% 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).