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Sodium alum information


Sodium alum
Names
IUPAC name
Aluminium sodium bis(sulfate) — water (1:12)
Other names
  • Sodium alum
  • Soda alum
  • E521
Identifiers
CAS Number
  • 10102-71-3 checkY
  • 7784-28-3 (dodecahydrate) checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 22972
ECHA InfoCard 100.030.239 Edit this at Wikidata
EC Number
  • 233-277-3
E number E521 (acidity regulators, ...)
PubChem CID
  • 24939
UNII
  • 0CM6A697VV checkY
  • 1224CG79TA (dodecahydrate) checkY
CompTox Dashboard (EPA)
  • DTXSID60890626 Edit this at Wikidata
InChI
  • InChI=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
    Key: ZEMWIYASLJTEHQ-UHFFFAOYSA-J
  • 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
    Key: ZEMWIYASLJTEHQ-XBHQNQODAL
SMILES
  • [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Na+].[Al+3]
Properties[1]
Chemical formula
NaAl(SO4)2·12H2O
Molar mass 458.28 g/mol
Appearance white crystalline powder
Density 1.6754 (20 °C)
Melting point 61 °C (142 °F; 334 K)
Solubility in water
208 g/100 ml (15 °C)
Refractive index (nD)
1.4388
Structure[2]
Crystal structure
Cubic, cP96
Space group
Pa3, No. 205
Lattice constant
a = 1221.4 pm
Coordination geometry
Octahedral (Na+)
Octahedral (Al3+)
Hazards
Flash point non-flammable
Related compounds
Other cations
Ammonium aluminium sulfate
Potassium aluminium sulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Sodium aluminium sulfate is the inorganic compound with the chemical formula NaAl(SO4)2·12H2O (sometimes written Na2SO4·Al2(SO4)3·24H2O). Also known as soda alum, sodium alum, or SAS, this white solid is used in the manufacture of baking powder and as a food additive. Its official mineral name is alum-Na (IMA symbol: Aum-Na[3]).

  1. ^ Weast, Robert C., ed. (1981). CRC Handbook of Chemistry and Physics (62nd ed.). Boca Raton, FL: CRC Press. p. B-146. ISBN 0-8493-0462-8..
  2. ^ Cromer, D. T.; Kay, M. I.; Larson, A. C. (1 February 1967). "Refinement of the alum structures. II. X-ray and neutron diffraction of NaAl(SO4)2·12H2O, γ-alum". Acta Crystallographica. 22 (2): 182–187. doi:10.1107/S0365110X67000313.
  3. ^ Warr, L.N. (2021). "IMA-CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.

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Sodium alum

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soda alum, sodium alum, or SAS, this white solid is used in the manufacture of baking powder and as a food additive. Its official mineral name is alum-Na...

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Alum

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"alum" often refers to potassium alum, with the formula KAl(SO 4) 2·12 H 2O. Other alums are named after the monovalent ion, such as sodium alum and...

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Potassium alum

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potassium or ammonium sulfates to convert aluminium sulfate into alum, while sodium or calcium would not work. At the time, potassium ("potash") was believed...

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Tapioca pearl

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contain any of them. Tapioca also contains very little cholesterol, fat, or sodium. To support to the creation of tapioca pearls, some additives are used,...

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Sodium sulfate

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Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formula Na2SO4 as well as several related hydrates. All...

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Baking powder

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30% sodium bicarbonate, 5–12% monocalcium phosphate, and 21–26% sodium aluminium sulfate. Alternately, a commercial baking powder might use sodium acid...

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Aluminium sulfate

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Aluminium sulfate is sometimes called alum or papermaker's alum in certain industries. However, the name "alum" is more commonly and properly used for...

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Sodium silicate

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Sodium silicate is a generic name for chemical compounds with the formula Na 2xSi yO 2y+x or (Na 2O) x·(SiO 2) y, such as sodium metasilicate Na 2SiO 3...

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Salammoniac

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guano deposits and burning coal seams. Associated minerals include sodium alum, native sulfur and other fumarole minerals. Notable occurrences include...

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Alunite

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15th century at Tolfa, near Rome, where it was mined for the manufacture of alum. First called aluminilite by J.C. Delamétherie in 1797, this name was contracted...

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History of aluminium

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complex, so for most of human history it was unknown. However, the compound alum has been known since the 5th century BCE and was used extensively by the...

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Deodorant

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sweating. Alum (typically potassium alum or ammonium alum, also described as "rock alum", or "rock crystal", or "natural deodorant"). Alum is a natural...

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Paper chemicals

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chemical pulping include the Kraft process, which uses caustic soda and sodium sulfide and is the most common; alternatively, the use of sulfurous acid...

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Chlorine

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either with alum and ammonium chloride or with vitriol and sodium chloride was first described in the De aluminibus et salibus ("On Alums and Salts",...

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Aluminium

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century. The nature of alum remained unknown. Around 1530, Swiss physician Paracelsus suggested alum was a salt of an earth of alum. In 1595, German doctor...

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Haematoxylin

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universally accepted. Franz Böhmer in 1865 published a haematoxylin formula using alum as a mordant, and in 1891, Paul Mayer published a formulation using a chemical...

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Double salt

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two or more different cations or anions. Examples of double salts include alums (with the general formula MIMIII(SO4)2·12H2O) and Tutton's salts (with the...

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Mordant

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acid, oxalic acid, alum, chrome alum, sodium chloride, and certain salts of aluminium, chromium, copper, iron, iodine, potassium, sodium, tungsten, and tin...

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Alkali soil

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removes hardness in the water and also converts sodium bicarbonates in river water into sodium carbonate. Sodium carbonates (washing soda) further reacts with...

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Aluminium hydroxide

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of the container during storage. Aluminium hydroxide is sometimes called "alum", a term generally reserved for one of several sulfates.[citation needed]...

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Korea General Chemicals Trading

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sodium nitrate, rubber, rubber asbestos packing materials, aluminum silicon, plastics, alcohols, inks, carbides, dyes, chrome yellow, potassium alum and...

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Alkali metal

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The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). Together with...

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Hydrogen chloride

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either with alum and ammonium chloride or with vitriol and sodium chloride was first described in the De aluminibus et salibus ("On Alums and Salts")...

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Clarifying agent

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iron(III) chloride (ferric chloride) polyacrylamide polyDADMAC sodium aluminate sodium silicate The following natural products are used as flocculants:...

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Mendozite

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sulfate mineral, one of the alum series, with formula NaAl(SO4)2·11H2O. It is a hydrated form of sodium aluminium sulfate (soda alum). It was discovered in...

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Sodium hexafluoroaluminate

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Sodium hexafluoroaluminate is an inorganic compound with formula Na3AlF6. This white solid, discovered in 1799 by Peder Christian Abildgaard (1740–1801)...

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Sulfuric acid

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solution of the purified alum, afterwards let it solidify (or crystallise) in the glass beaker. You will get the best qalqadis (white alum) that may be had....

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Sodium aluminium hydride

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Sodium aluminium hydride or sodium alumanuide is an inorganic compound with the chemical formula NaAlH4. It is a white pyrophoric solid that dissolves...

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ATC code S01

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S01XA02 Retinol S01XA03 Sodium chloride, hypertonic S01XA04 Potassium iodide S01XA05 Sodium edetate S01XA06 Ethylmorphine S01XA07 Alum S01XA08 Acetylcysteine...

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