Potassium Alum - A Natural Mordant
How to Grow Large Alum Crystals by Crystallization
HOW TO AFTER SHAVE ROUTINE SHAVING TUTORIAL by Geofatboy ShaveNation.com Alum Block Stick
Update on the Potassium Alum car battery - Update zur Kalium Alaun Auto Batterie
Potassium Alum Pyramid - Stargate Magasine - Healing with emotional music
Potassium Alum, China
Preparation and Analysis of Alum
Mineral deodorant Finesse Crystal Style - Potassium Alum Crystals made in Italy
Alum Pyramid Seed
Learn how to grow a beautiful single crystal of salt at home!
CHEM 111 Lab: Alum Prelab
potassium alum Demo
Vivid pink 5.3" Fantastically crystallized POTASSIUM ALUM pineapple
5.3" Hot NeonPink POTASSIUM ALUM Pineapple Shaped Crystal Cluster-China for sale
The Alum Experiment
Scrap Aluminium Foil to Potash Alum Procedure Video
Pyramid alum growing crystal - Cristal d'alun pyramidal
Alum from Soda Cans
alum growing crystal lab 2
Pyramid Alum Crystal 2008-08-16
Insect inside Alum Pyramid Crystal
alum growing crystal lab - labo pour cristaux d'alun
alum octahedron crystal -- cristal d'alun en octaèdre
Complex Ions: Making Chrom Alum Crystals
Alum Crystal Prism
Alum Single Crystal
aluminum sulfate, aluminum ammonium sulphate, aluminum potassium sulphate----manufacturer
Alum history, tutorial, and opinions as well as suggestions - from the W.S.Review
Guide: Hvordan funker en Alum stick?
DIY: Natural Deodorant Spray
How to Grow Alum Crystals
Crystal Growing by Thames & Kosmos
Why do concealers crease & not last?! || KUWR
Cristallisation du sel d'alun - Alum Growing Crystal
Counterfeit (fake, forged) chemical eggs!
used potassium sulfate plant equipments for sale
Deo Allume di Potassio Finesse Crystal Style.m4v
'Feel tight and wanted again!' The disturbing 'vaginal shrinking' creams that promise
industrial grade black mica water purification for removing chrome from water
Crystal Deodorant Best Seller - thanksgiving day
Liquid Virgin Review - Does Liquid Virgin Really Work?
Sure Grip Tighten Her Review - Does This 'Vagina Tightener' Work?
Описание природного дезодоранта - Алунита
🌸44 Déodorant 100% naturel
How To Treat Silty River Water With "Alum"
Wetshaving Tutorial - How to use alum
Alum crystallization Timelapse.
Conversion Of A Dry-Charge Lead Acid Battery To an Alum Crystal Cell Battery John Bedini
bauxite to alluminium making used machine in mumbai
From Wikipedia, the free encyclopedia
This article needs additional citations for . verification (March 2010)
Potassium alum, potash alum, tawas, or potassium aluminum sulfate is a chemical compound: the potassium double sulfate of aluminium. Its chemical formula is KAl(SO 4) 2 and it is commonly found in its dodecahydrate form as KAl(SO 4) 2.12(H 2O). Alum is the common name for this chemical compound, given the nomenclature of potassium aluminum sulfate dodecahydrate. It is commonly used in water purification, leather tanning, dyeing, fireproof textiles, and baking powder. It also has cosmetic uses as a deodorant, as an aftershave treatment and as a styptic for minor bleeding from shaving. [4 ]
Characteristics [ edit ]
potassium alum crystal with unequal distribution of the face area.
Potassium alum crystallizes in regular
octahedra with flattened corners, and is very soluble in water. The solution reddens litmus and is an astringent. When heated to nearly a red heat it gives a porous, friable mass which is known as "burnt alum." It fuses at 92 °C (198 °F) in its own water of crystallization. "Neutral alum" is obtained by the addition of as much sodium carbonate to a solution of alum as will begin to cause the separation of alumina.
Mineral form and occurrence [ edit ]
Potassium alum or
alum-(K) is a naturally occurring sulfate mineral which typically occurs as encrustations on rocks in areas of weathering and oxidation of sulfide minerals and potassium-bearing minerals. In the past, alum was obtained from alunite, a mineral mined from sulfur-containing volcanic sediments source. Alunite is an associate and likely potassium and aluminium source. [5 ] [3 ] It has been reported at [6 ] Vesuvius, Italy, east of Springsure, Queensland, Alum Cave, Tennessee, Alum Gulch, Santa Cruz County, Arizona and the Philippine island of Cebu. A related mineral is , a fibrous mineral with formula KAl(SO kalinite 4) 2·11(H 2O). [7 ]
Chemical [ edit ]
in tanning of leather to prepare the hide
mordant for dyes in the clarifying of turbid liquids, including post-storm treatment of lakes to precipitate contaminants
[8 ] as a fire retardant in
textile products (historically) as a hardener for photographic emulsions (films and papers), usually as part of the
fixer. Modern alternatives are superior.
Medicinal [ edit ]
Culinary [ edit ]
As an additive to
baking powder to provide a second leavening phase at high temperatures.
Traditional [ edit ]
Toxicology and safety [ edit ]
Deodorant crystals containing synthetically made potassium alum are a weak
irritant to the skin. [10 ]
See also [ edit ]
References [ edit ]
^ International Union of Pure and Applied Chemistry (2005). (IUPAC Recommendations 2005). Cambridge (UK): Nomenclature of Inorganic Chemistry RSC– IUPAC. ISBN 0-85404-438-8. Electronic version.
^ "Aluminium potassium sulfate dodecahydrate". ChemExper . Retrieved 2013-04-19.
^ a b "Alum-(K) Mineral Data". Mineralogy Database . Retrieved 2013-04-19.
^ a b Helmenstine, Anne Marie. "What is Alum?". About.com . Retrieved 2013-04-19.
^ Bottomley (2010) p. 35
^ "Alum-(K) mineral data and informaton". MinDat . Retrieved 2013-04-19.
^ "Kalinite Mineral Data". MinDat . Retrieved 2013-04-19.
^ http://tcm.health-info.org/Herbology.Materia.Medica/mingfan-properties.htm Uses of Alum in Traditional Chinese Medicine
^ Gallego H, Lewis EJ, Crutchfield CE 3rd (July 1999). "Crystal deodorant dermatitis: irritant dermatitis to alum-containing deodorant". Cutis 64 (1): 65–6. PMID 10431678.
Further reading [ edit ]
Bottomley, L.; Bottomley, L.A. (2010). School of Chemistry & Bichemistry, Georgia Institute of Technology, Chemistry 1310: Laboratory Manual. Plymouth, MI: Hayden-McNeil Publishing. ISBN 978-0-7380-3819-3.
External links [ edit ]