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  2. Ammonium iron(III) sulfate - Wikipedia

    en.wikipedia.org/wiki/Ammonium_iron(III)_sulfate

    Ammonium iron(III) sulfate, NH 4 Fe(SO 4) 2 ·12 H 2 O, or NH 4 [Fe(H 2 O) 6](SO 4) 2 ·6 H 2 O, also known as ferric ammonium sulfate (FAS) or iron alum, is a double salt in the class of alums, which consists of compounds with the general formula AB(SO 4) 2 · 12 H 2 O. [2] It has the appearance of weakly violet, octahedrical crystals.

  3. Alunite - Wikipedia

    en.wikipedia.org/wiki/Alunite

    Alunite is a hydroxylated aluminium potassium sulfate mineral, formula K Al 3 (S O 4) 2 (OH) 6.It was first observed in the 15th century at Tolfa, near Rome, where it was mined for the manufacture of alum.

  4. Aluminium sulfate - Wikipedia

    en.wikipedia.org/wiki/Aluminium_sulfate

    Aluminium sulfate is sometimes called alum or papermaker's alum in certain industries. However, the name " alum " is more commonly and properly used for any double sulfate salt with the generic formula X Al(SO 4 ) 2 ·12H 2 O , where X is a monovalent cation such as potassium or ammonium .

  5. How to Get Rid of Hemorrhoids at Home—Plus When to ... - AOL

    www.aol.com/lifestyle/rid-painful-hemorrhoids...

    External hemorrhoids occur when hemorrhoids are pushed just outside of the anal opening. When this happens, they can swell up, bleed, and feel seriously painful, irritated, and itchy, notes Dr ...

  6. Ammonium alum - Wikipedia

    en.wikipedia.org/wiki/Ammonium_alum

    Ammonium aluminium sulfate, also known as ammonium alum or just alum (though there are many different substances also called "alum"), is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH 4)Al(SO 4) 2 ·12H 2 O. It is used in small amounts in a variety of niche applications.

  7. Potassium alum - Wikipedia

    en.wikipedia.org/wiki/Potassium_alum

    Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound first mentioned under various Sanskrit names in Ayurvedic medicinal texts such as charak samhita, sushrut samhita, and ashtang hridaya; is chemically defined as the double sulfate of potassium and aluminium, with chemical formula KAl(SO 4) 2.

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