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Crystal Deodorant - Is It Safe? Plus - A Discussion of Aluminium
Crystal Deodorant - Is It Safe? Plus - A Discussion of Aluminium
Published: 2014/03/10
Channel: Rachel Reviews & Muse
5 Amazing Benefits of Alum
5 Amazing Benefits of Alum
Published: 2016/09/13
Channel: Health Tips
Alum from Soda Cans
Alum from Soda Cans
Published: 2013/02/24
Channel: mrhomescientist
Is Potassium Alum Safe?
Is Potassium Alum Safe?
Published: 2017/05/26
Channel: SS HairQAs
Grow Transparent Single Crystals of Alum salt at Home!
Grow Transparent Single Crystals of Alum salt at Home!
Published: 2014/05/05
Channel: Thoisoi2 - Chemical Experiments!
Preparation of Pure Sample of Potash Alum - MeitY OLabs
Preparation of Pure Sample of Potash Alum - MeitY OLabs
Published: 2015/10/15
Channel: amritacreate
Are Crystal Deodorants Really Aluminum-free?
Are Crystal Deodorants Really Aluminum-free?
Published: 2017/02/14
Channel: Brandon Blackmon
फिटकरी (Alum)- beauty benefits of Alum/Remove unwanted hair & wrinkles with Alum/Alum for fair skin
फिटकरी (Alum)- beauty benefits of Alum/Remove unwanted hair & wrinkles with Alum/Alum for fair skin
Published: 2016/10/13
Channel: Pooja Luthra
Alum Crystal or Tawas- a very affordable multipurpose stone
Alum Crystal or Tawas- a very affordable multipurpose stone
Published: 2016/10/02
Channel: Bless Parco
How Does This One Little Block Do So Much ? and its so cheap Osma Alum Stone block
How Does This One Little Block Do So Much ? and its so cheap Osma Alum Stone block
Published: 2016/08/25
Channel: Eco Natural Products
Top 15 Uses of Alum for face, skin, and health - Benefits of Alum Fitkari powder
Top 15 Uses of Alum for face, skin, and health - Benefits of Alum Fitkari powder
Published: 2017/06/17
Channel: Wenke
Natural Alum Crystal for Deodorant, Shaving and Crafts: blocks, chips, pebbles, powder.
Natural Alum Crystal for Deodorant, Shaving and Crafts: blocks, chips, pebbles, powder.
Published: 2016/07/23
Channel: Natural Spa Supplies Ltd
Grow Purple Single Crystals of Salt at Home! DIY Home Decorations!
Grow Purple Single Crystals of Salt at Home! DIY Home Decorations!
Published: 2015/11/14
Channel: Thoisoi2 - Chemical Experiments!
Chemistry Practical Class XII To Prepare Crystals of Potash Alum
Chemistry Practical Class XII To Prepare Crystals of Potash Alum
Published: 2014/12/03
Channel: Edusat Haryana
Potassium Alum - A Natural Mordant
Potassium Alum - A Natural Mordant
Published: 2013/09/06
Channel: random424vid
Purification of Potash Alum by Crystallization - MeitY OLabs
Purification of Potash Alum by Crystallization - MeitY OLabs
Published: 2015/02/03
Channel: amritacreate
Crystal Project (Potassium Aluminium Sulfate)
Crystal Project (Potassium Aluminium Sulfate)
Published: 2015/11/21
Channel: Preshigh CrystalProj
7 SURPISING USES OF ALUM YOU NEVER KNEW
7 SURPISING USES OF ALUM YOU NEVER KNEW
Published: 2017/06/09
Channel: Natural Cures & Tips
Preparing crystals of potash alum
Preparing crystals of potash alum
Published: 2016/06/27
Channel: Prabhat Saxena
Is Potassium Alum Safe?
Is Potassium Alum Safe?
Published: 2017/11/10
Channel: Spertu Spen
Potassium Alum Pyramid - Stargate Magasine - Healing with emotional music
Potassium Alum Pyramid - Stargate Magasine - Healing with emotional music
Published: 2009/06/28
Channel: Normand Boivin
Chemistry Lab - Synthesis of Alum
Chemistry Lab - Synthesis of Alum
Published: 2015/07/19
Channel: WildKarrde
Choosing Natural Alum Crystals for Different Uses: Block, Pebbles or Powder
Choosing Natural Alum Crystals for Different Uses: Block, Pebbles or Powder
Published: 2015/10/06
Channel: Natural Spa Supplies Ltd
Бритьё. Квасцы. Алунит. Квасцовые камни, их разновидности и тонкости применения. Potassium Alum.
Бритьё. Квасцы. Алунит. Квасцовые камни, их разновидности и тонкости применения. Potassium Alum.
Published: 2017/04/22
Channel: Mr. Бритва
What Is The Use Of Potassium Alum?
What Is The Use Of Potassium Alum?
Published: 2017/11/10
Channel: Spertu Spen
Extracting potassium alum blocks by Verdan
Extracting potassium alum blocks by Verdan
Published: 2010/02/23
Channel: VerdanDeodorantStone
Homemade Alum & Rosewater Mask To Remove Hair From Faces, Hands, Legs How To Use
Homemade Alum & Rosewater Mask To Remove Hair From Faces, Hands, Legs How To Use
Published: 2016/06/24
Channel: Hairstyles
Shaping potassium alum crystal  into Natural Deodorant Sticks
Shaping potassium alum crystal into Natural Deodorant Sticks
Published: 2010/07/07
Channel: VerdanDeodorantStone
Update on the Potassium Alum car battery - Update zur Kalium Alaun Auto Batterie
Update on the Potassium Alum car battery - Update zur Kalium Alaun Auto Batterie
Published: 2013/09/03
Channel: overunitydotcom
Potash alum Meaning
Potash alum Meaning
Published: 2015/04/28
Channel: ADictionary
Complex Ions: Making Chrom Alum Crystals
Complex Ions: Making Chrom Alum Crystals
Published: 2013/03/23
Channel: FranklyChemistry
Crystallization of Potassium Alum [ KAl(SO4)2*12H2O ]
Crystallization of Potassium Alum [ KAl(SO4)2*12H2O ]
Published: 2016/02/19
Channel: Antonio Gravina
Is Potassium Alum Safe?
Is Potassium Alum Safe?
Published: 2017/11/11
Channel: Phetues Phen
Is Potassium Alum Safe?
Is Potassium Alum Safe?
Published: 2017/11/25
Channel: Zuentxi Zurs
ALUM IN GARDENING - Benefits or Uses of Alum on Plants and Garden - Aluminum Soil Amendment
ALUM IN GARDENING - Benefits or Uses of Alum on Plants and Garden - Aluminum Soil Amendment
Published: 2017/10/18
Channel: GARDEN TIPS
What Is Aluminum Potassium Sulfate Used For?
What Is Aluminum Potassium Sulfate Used For?
Published: 2017/05/26
Channel: SS HairQAs
Cleaning Of Silty or Mud Water Using Alum 100% Natural and Home Made
Cleaning Of Silty or Mud Water Using Alum 100% Natural and Home Made
Published: 2015/11/13
Channel: Swadeshisolutions 1
Using a Deodorant Stone
Using a Deodorant Stone
Published: 2008/04/29
Channel: rainbook101
Enjoy Potassium Alum Crystal and Vivaldi. (Заценим кристалл алюмо-калиевых квасцов и Вивальди.)
Enjoy Potassium Alum Crystal and Vivaldi. (Заценим кристалл алюмо-калиевых квасцов и Вивальди.)
Published: 2016/05/23
Channel: Хим Химыч
How to grow a crystal using aluminuim potassium sulphate
How to grow a crystal using aluminuim potassium sulphate
Published: 2015/10/04
Channel: Dancing Fireworks
Potassium Alum Crystal
Potassium Alum Crystal
Published: 2014/12/04
Channel: MENG-HAN Tu
potassium alum Demo
potassium alum Demo
Published: 2014/03/27
Channel: paperplanestudios
Potassium Alum, China
Potassium Alum, China
Published: 2010/07/14
Channel: treasuremtnmining
CHEM 111 Lab: Alum Prelab
CHEM 111 Lab: Alum Prelab
Published: 2013/09/16
Channel: SUNY Oneonta Chemistry
Pt 2 Adding Color and Potassium Alum powder to boiling Water
Pt 2 Adding Color and Potassium Alum powder to boiling Water
Published: 2017/12/06
Channel: Blue Lotus Mermaid
Vivid pink 5.3" Fantastically crystallized POTASSIUM ALUM pineapple
Vivid pink 5.3" Fantastically crystallized POTASSIUM ALUM pineapple
Published: 2011/01/25
Channel: treasuremtnmining
Potassium Alum Monocrystals
Potassium Alum Monocrystals
Published: 2016/11/19
Channel: Cande Molina
Mineral deodorant Finesse Crystal Style - Potassium Alum Crystals made in Italy
Mineral deodorant Finesse Crystal Style - Potassium Alum Crystals made in Italy
Published: 2009/07/29
Channel: Marco Fazzari
Beneficos de la Piedra alumbre,  qué es la piedra alumbre y para que sirve. desodorante natural
Beneficos de la Piedra alumbre, qué es la piedra alumbre y para que sirve. desodorante natural
Published: 2017/01/16
Channel: Junto a la naturaleza
Expt 9 Alum from Scrap Aluminum Pre-Lab Lecture Video
Expt 9 Alum from Scrap Aluminum Pre-Lab Lecture Video
Published: 2015/08/24
Channel: Melissa Golden
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Potassium aluminium sulfate
Aluminium potassium sulfate
Names
IUPAC name
Aluminium potassium sulfate dodecahydrate[2][3]
Other names
Potassium alum
Potash alum
Alum-(K)[1]
phitkari
Identifiers
3D model (JSmol)
ChEBI
ECHA InfoCard 100.030.116
E number E522 (acidity regulators, ...)
UNII
Properties
KAl(SO4)2·12H2O
Molar mass 474.3884 g/mol
Appearance white small crystals
Odor watery metallic
Density 1.725 g/cm3
Melting point 92 to 95 °C (198 to 203 °F; 365 to 368 K)
Boiling point 200 °C (392 °F; 473 K)
14.00 g/100 mL (20 °C)
36.80 g/100 mL (50 °C)
Solubility insoluble in acetone
1.4564
Hazards
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Potassium alum, potash alum, or potassium aluminum sulfate is a chemical compound: the potassium double sulfate of aluminium. Its chemical formula is KAl(SO4)2 and it is commonly found in its dodecahydrate form as KAl(SO4)2·12H2O. 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,[4] 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.[5]

Characteristics[edit]

Octahedral 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.[6] Alunite is an associate and likely potassium and aluminium source.[1][7] It has been reported at 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 kalinite, a fibrous mineral with formula KAl(SO4)2·11H2O.[8]

Uses[edit]

Chemical[edit]

  • in tanning of leather to prepare the hide
  • as a mordant for dyes
  • in the clarifying of turbid liquids, including post-storm treatment of lakes to precipitate contaminants[9]
  • 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.
  • To preserve and add crispness to fruit and vegetable especially when pickling.

Traditional[edit]

Toxicology and safety[edit]

Potassium alum may be a weak irritant to the skin.[10]

See also[edit]

References[edit]

  1. ^ a b "Alum-(K) Mineral Data". Mineralogy Database. Retrieved 2013-04-19. 
  2. ^ International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSCIUPAC. ISBN 0-85404-438-8. Electronic version.
  3. ^ "Aluminium potassium sulfate dodecahydrate". ChemExper. Retrieved 2013-04-19. 
  4. ^ Editors, The. "alum | chemical compound". Britannica.com. Retrieved 2016-01-18. 
  5. ^ a b Helmenstine, Anne Marie. "What is Alum?". About.com. Retrieved 2013-04-19. 
  6. ^ Bottomley (2010) p. 35.
  7. ^ "Alum-(K) mineral data and information". MinDat. Retrieved 2013-04-19. 
  8. ^ "Kalinite Mineral Data". MinDat. Retrieved 2013-04-19. 
  9. ^ "Storm water treatment will strip phosphorus from Arboretum pond, College of Engineering @ The University of Wisconsin-Madison, initiatives in energy, health, nanotechnology, security, and information technology". Engr.wisc.edu. Retrieved 2016-01-18. 
  10. ^ 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 & Biochemistry, Georgia Institute of Technology, Chemistry 1310: Laboratory Manual. Plymouth, MI: Hayden-McNeil Publishing. ISBN 978-0-7380-3819-3. 

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