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The western desert of Egypt was a major source of alum substitutes in antiquity. These eva...

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An alum (/ˈæləm/) is a type of chemical compound, usually a hydrated double sulfate salt o...

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Magnesium sulfate or magnesium sulphate is a chemical compound, a salt with the formula Mg...

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Iron(II) sulfate (British English: iron(II) sulphate) or ferrous sulfate denotes a range o...

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Boron is a chemical element. It has the symbol B and atomic number 5. In its crystalline f...

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Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula Si...

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Magnesium sulfate or magnesium sulphate is a chemical compound, a salt with the formula Mg...

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Iron(II) sulfate (British English: iron(II) sulphate) or ferrous sulfate denotes a range o...

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esorcinol (or resorcin) is a phenolic compound. It is an organic compound with the formula...

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