Difference between revisions of "Sodium aluminium sulfate"
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| + | {{redirect|Sodium alum|the mineral form|Alum-(Na)}} | ||
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{{Chembox | {{Chembox | ||
| + | | Name = Sodium aluminium sulfate dodecahydrate | ||
| IUPACName = Aluminium sodium bis(sulfate) — water (1:12) | | IUPACName = Aluminium sodium bis(sulfate) — water (1:12) | ||
| OtherNames = Sodium alum<br/>Soda alum<br/>[[E number|E521]] | | OtherNames = Sodium alum<br/>Soda alum<br/>[[E number|E521]] | ||
| Section1 = {{Chembox Identifiers | | Section1 = {{Chembox Identifiers | ||
| − | | CASNo = | + | | CASNo = 7784-28-3<!--from TOXNET and CHRIP--> |
| − | |||
| EC-number = 233-277-3 | | EC-number = 233-277-3 | ||
| − | | ChemSpiderID = 22972 | + | | ChemSpiderID = 22972 |
| − | | InChI = 1/Al.Na.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4 | + | | InChI = 1/Al.Na.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4 |
| − | | InChIKey = ZEMWIYASLJTEHQ-XBHQNQODAL | + | | InChIKey = ZEMWIYASLJTEHQ-XBHQNQODAL |
| − | | StdInChI = 1S/Al.Na.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4 | + | | StdInChI = 1S/Al.Na.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;;2*(H2,1,2,3,4);12*1H2/q+3;+1;;;;;;;;;;;;;;/p-4 |
| − | | StdInChIKey = ZEMWIYASLJTEHQ-UHFFFAOYSA-J | + | | StdInChIKey = ZEMWIYASLJTEHQ-UHFFFAOYSA-J |
}} | }} | ||
| Section2 = {{Chembox Properties | | Section2 = {{Chembox Properties | ||
| − | | Reference = <ref>{{RubberBible62nd|page=B-146}}.</ref> | + | | Reference = <ref name="RubberBible">{{RubberBible62nd|page=B-146}}.</ref> |
| Formula = NaAl(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O | | Formula = NaAl(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O | ||
| MolarMass = 458.28 g/mol | | MolarMass = 458.28 g/mol | ||
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}} | }} | ||
}} | }} | ||
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| + | {{Chembox | ||
| + | | Name = Sodium aluminium sulfate (anhydrous) | ||
| + | | IUPACName = Aluminium sodium bis(sulfate) | ||
| + | | Section1 = {{Chembox Identifiers | ||
| + | | CASNo = 10102-71-3<!--from ESIS and CHRIP--> | ||
| + | | EC-number = 233-277-3 | ||
| + | | ChemSpiderID = | ||
| + | | InChI = | ||
| + | | InChIKey = | ||
| + | | StdInChI = | ||
| + | | StdInChIKey = | ||
| + | }} | ||
| + | | Section2 = {{Chembox Properties | ||
| + | | Reference = <ref name="RubberBible"/> | ||
| + | | Formula = NaAl(SO<sub>4</sub>)<sub>2</sub> | ||
| + | | MolarMass = | ||
| + | | Appearance = while crystalline powder | ||
| + | | Solubility = 110 g/100 ml (15 °C) | ||
| + | }} | ||
| + | | Section7 = {{Chembox Hazards | ||
| + | | EUIndex = not listed | ||
| + | | FlashPt = non-flammable | ||
| + | }} | ||
| + | }} | ||
| + | {{FixBunching|end}} | ||
'''Sodium aluminium sulfate''', NaAl(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O or Na<sub>2</sub>SO<sub>4</sub>·Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>·24H<sub>2</sub>O, also known as '''soda alum''' or '''sodium alum''', is a form of [[alum]] used in the [[acidity regulator]] of food ([[E number|E521]]) as well as in the manufacture of [[baking powder]]. It is also a common [[mordant]] for the preparation of [[hematoxylin]] solutions for [[staining]] [[Cell nucleus|cell nuclei]] in [[histopathology]]. | '''Sodium aluminium sulfate''', NaAl(SO<sub>4</sub>)<sub>2</sub>·12H<sub>2</sub>O or Na<sub>2</sub>SO<sub>4</sub>·Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>·24H<sub>2</sub>O, also known as '''soda alum''' or '''sodium alum''', is a form of [[alum]] used in the [[acidity regulator]] of food ([[E number|E521]]) as well as in the manufacture of [[baking powder]]. It is also a common [[mordant]] for the preparation of [[hematoxylin]] solutions for [[staining]] [[Cell nucleus|cell nuclei]] in [[histopathology]]. | ||
| − | The classical [[Cubic crystal system|cubic]] alum structure is the [[Hydrate|dodecahydrate]], which is known in [[mineralogy]] as [[alum-(Na)]].<ref>{{citation | title = Tidying up mineral names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks | first = Ernst A.J. | last = Burke | journal = Mineralogical Record | volume = 39 | issue = 2 | year = 2008 | pages = 131–35}}.</ref><ref>{{WebMineral | name = Alum-(Na) | url = http://webmineral.com/data/Alum-%28Na%29.shtml | accessdate = 2009-11-28}}.{{ | + | The classical [[Cubic crystal system|cubic]] alum structure is the [[Hydrate|dodecahydrate]], which is known in [[mineralogy]] as [[alum-(Na)]].<ref>{{citation | title = Tidying up mineral names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks | first = Ernst A.J. | last = Burke | journal = Mineralogical Record | volume = 39 | issue = 2 | year = 2008 | pages = 131–35}}.</ref><ref>{{WebMineral-ref | name = Alum-(Na) | url = http://webmineral.com/data/Alum-%28Na%29.shtml | accessdate = 2009-11-28}}.{{MinDat-ref | name = Alum-(Na) | id = 3703 | accessdate = 2009-11-28}}.</ref> Two other rare mineral forms are known: [[mendozite]] (undecahydrate)<ref>{{WebMineral-ref | name = Mendozite | url = http://webmineral.com/data/Mendozite.shtml | accessdate = 2009-11-28}}.{{MinDat-ref | name = Mendozite | id = 2643 | accessdate = 2009-11-28}}.</ref> and [[tamarugite]] (hexahydrate).<ref>{{WebMineral-ref | name = Tamarugite | url = http://www.webmineral.com/data/Tamarugite.shtml | accessdate = 2009-11-28}}.{{MinDat-ref | name = Tamarugite | id = 3878 | accessdate = 2009-11-28}}.</ref> |
==References== | ==References== | ||
Revision as of 06:31, 29 November 2009
"Sodium alum" redirects here. For the mineral form, see Alum-(Na).
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Sodium aluminium sulfate, NaAl(SO4)2·12H2O or Na2SO4·Al2(SO4)3·24H2O, also known as soda alum or sodium alum, is a form of alum used in the acidity regulator of food (E521) as well as in the manufacture of baking powder. It is also a common mordant for the preparation of hematoxylin solutions for staining cell nuclei in histopathology.
The classical cubic alum structure is the dodecahydrate, which is known in mineralogy as alum-(Na).[3][4] Two other rare mineral forms are known: mendozite (undecahydrate)[5] and tamarugite (hexahydrate).[6]
References
- ↑ 1.0 1.1 CRC Handbook of Chemistry and Physics, 62nd ed.; Weast, Robert C., Ed.; CRC Press: Boca Raton, FL, 1981; p B-146. ISBN 0-8493-0462-8.
- ↑ Cromer, D. T.; Kay, A. C.; Larson Refinement of the alum structures. II. X-ray and neutron diffraction of NaAl(SO4)2·12H2O, γ-alum. Acta Crystallogr. 1967, 22 (2), 182–87. DOI: 10.1107/S0365110X67000313.
- ↑ Burke, Ernst A.J. Tidying up mineral names: an IMA-CNMNC scheme for suffixes, hyphens and diacritical marks. Mineralogical Record 2008, 39 (2), 131–35.
- ↑ Alum-(Na), <http://webmineral.com/data/Alum-%28Na%29.shtml> (accessed 28 November 2009), WebMineral.com.Alum-(Na), <http://www.mindat.org/show.php?id=3703> (accessed 28 November 2009), MinDat.org.
- ↑ Mendozite, <http://webmineral.com/data/Mendozite.shtml> (accessed 28 November 2009), WebMineral.com.Mendozite, <http://www.mindat.org/show.php?id=2643> (accessed 28 November 2009), MinDat.org.
- ↑ Tamarugite, <http://www.webmineral.com/data/Tamarugite.shtml> (accessed 28 November 2009), WebMineral.com.Tamarugite, <http://www.mindat.org/show.php?id=3878> (accessed 28 November 2009), MinDat.org.
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