According to the nomenclature of the IUPAC (International Union of Pure and Applied Chemistry) valid designation for sulphuric acid; see there.
Colourless, oily, very viscous and highly corrosive acid with the international designation dihydrogensulphate. It must not be confused with the related schweflige Säuresulphurous...
There is a vast number of sources on the web where one can acquire knowledge about wine. But none has the scope, timeliness and accuracy of the information in the encyclopaedia at wein.plus. I use it regularly and rely on it.
Sigi Hiss
freier Autor und Weinberater (Fine, Vinum u.a.), Bad Krozingen