Sulfuric acid (alternative spelling sulphuric acid), also known as vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula H2SO4. It is a colorless, odorless, and viscous liquid that is soluble in water and is synthesized in reactions that are highly exothermic.
Its corrosiveness can be mainly ascribed to its strong acidic nature, and, if at a high concentration, its dehydrating and oxidizing properties. It is also hygroscopic, readily absorbing water vapor from the air. Upon contact, sulfuric acid can cause severe chemical burns and even secondary thermal burns; it is very dangerous even at lower concentrations.
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Item
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Index
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Superior Quality
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First Grade
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Qualified Product
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H2SO4 %¡Ý
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92.5 OR 98
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92.5 OR 98
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92.5 OR 98
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SO4 %¡Ü
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-
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-
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-
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Ash content %¡Ü
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0.02
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0.03
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0.10
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Fe %¡Ü
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0.005
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0.010
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-
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As %¡Ü
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0.0001
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0.005
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-
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Hg %¡Ü
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0.001
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0.01
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-
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Pb %¡Ü
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0.005
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0.02
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-
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Transparency (mm) ¡Ý
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80
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50
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-
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Hazen (ml) ¡Ü
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2.0
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2.0
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-
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Used in the fertilizer, petroleum refining, and battery industries;
also used in metal cleaning and electroplating; Used in printing, publishing, and photography shops;
Used as a wet etchant in semiconductor manufacturing at a standard concentration of 96%.
It is widely produced with different methods, such as contact process, wet sulfuric acid process and some other methods.
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