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Sulphuric Acid grades are available in a variety of strengths for commercial use. Sulphuric Acid grades of pure 100% Sulphuric Acid do not exist naturally because of the highly hygroscopic nature of Sulphuric Acid. Sulphuric Acid occurs naturally as acid rain, a result of atmospheric oxidisation of Sulphur Dioxide which exists as a product of most power stations powered by fossil fuels.
In the Natural World, Sulphuric Acid has been found in the upper atmosphere of Venus and on Jupiter’s moon Europa.
Commercially, Sulphuric Acid is generally available as:-
10% solution for laboratory use
33.5% solution as Battery Acid in lead/acid batteries
62.2% solution as fertilizer acid
73.6% solution as tower acid
Approximately 97% solution as concentrated acid
As well as these Sulphuric Acid grades, Sulphuric Acid is widely available as a standard solution at between 0.05M and 2M.
Solutions are available as technical grades which are for general purposes. Technical grade Sulphuric Acid can be used in the manufacture of fertilizers, fibres, paint and in the process of food manufacture.
The highest quality Sulphuric Acid grades are used for making pharmaceuticals and dyes. Pure grades of Sulphuric Acid comply with the standards of British Pharmacopoeia (BP), European Pharmacopoeia (EP) and United States Pharmacopoeia (USP). Pure Sulphuric Acid is a clear liquid with an ‘oily’ appearance. This is why Sulphuric Acid used to be known as Oil of Vitriol, due to its oily nature.
Sulphuric Acid is also sometimes spelt Sulfuric Acid with a 'f' rather than a 'ph'. The spelling of Sulfuric Acid tends to be used in the Americas whilst the UK and Europe tend to spell the word as Sulphuric Acid. Vitriol, Spirit or Vitriol and Oil of Vitriol are all alternate names for Sulphuric Acid, whose chemical formulation is H2SO4.
http://www.sulphuric-acid.co.uk/sulphuric-acid-grades | Saved Friday, November 18th, 2011 - 6:11 AM