<unk>  (American spelling and the preferred IUPAC name) or sulphuric<unk>  (Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral<unk>  composed of the elements sulfur, oxygen and hydrogen, with the molecular formula . It is a colorless, odorless and viscous liquid that is miscible with water. Pure<unk>  does not exist naturally on Earth due to its strong affinity to water vapor; for this reason, it is hygroscopic and readily absorbs water vapor from the air. Concentrated<unk>  is highly corrosive towards other materials, from rocks to metals, since it is an oxidant with powerful dehydrating properties. Phosphorus pentoxide is a notable exception in that it is not dehydrated by<unk> , but to the contrary dehydrates<unk>  to sulfur trioxide. Upon addition of<unk>  to water, a considerable amount of heat is released; thus the reverse procedure of adding water to the<unk>  should not be performed since the heat released may boil the solution, spraying droplets of hot<unk>  during the process. Upon contact with body tissue,<unk>  can cause severe<unk> ic chemical burns and even secondary thermal burns due to dehydration. Dilute<unk>  is substantially less hazardous without the oxidative and dehydrating properties; however, it should still be handled with care for its<unk> ity.<unk>  is a very important commodity chemical, and a nation's<unk>  production is a good indicator of its industrial strength. It is widely produced with different methods, such as contact process, wet<unk>  process, lead chamber process and some other methods.<unk>  is also a key substance in the chemical industry. It is most commonly used in fertilizer manufacture, but is also important in mineral processing, oil refining, wastewater processing, and chemical synthesis. It has a wide range of end applications including in domestic<unk> ic drain cleaners, as an electrolyte in lead-acid batteries, in dehydrating a compound, and in various cleaning agents.<unk>  can be obtained by dissolving sulfur trioxide in water.
Sulfuric acid
Silver sulfadiazine
Zinc oxide
Copper naproxen
Salicylic acid
Gadobenic acid
Tienilic acid
Silver diammine fluoride