Sulfuric acid (alternative spelling sulphuric acid) is a highly corrosive strong mineral acid with the molecular formula H2SO4. It is a colorless to slightly yellow viscous liquid which is soluble in water at all concentrations. Sometimes, it may be dark brown as dyed during industrial production process in order to alert people's awareness to its hazards. The historical name of this acid is oil of vitriol. It is a diprotic acid which may show different properties depending upon its concentration. Its corrosiveness on metals, stones, skin, eyes and flesh or other materials can be mainly ascribed to its strong acidic nature and, if concentrated, strong dehydrating property and strong oxidizing property. Concentrated sulfuric acid can cause very serious damage upon contact as not only does it hydrolyze proteins and lipids leading to chemical burn, but also dehydrates carbohydrates resulting in secondary thermal burn. If it contacts eyes, permanent blindness may occur.
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