Skip to Content
Merck
CN

402818

Ammonium aluminum sulfate dodecahydrate

ACS reagent, ≥98%

Synonym(s):

Aluminum ammonium sulfate dodecahydrate, Ammonium alum

Sign In to View Organizational & Contract Pricing.

Select a Size

About This Item

Linear Formula:
AlNH4(SO4)2 · 12H2O
CAS Number:
7784-26-1
Molecular Weight:
453.33
NACRES:
NB.24
PubChem Substance ID:
329755965
UNSPSC Code:
12352300
EC Number:
232-055-3
MDL number:
MFCD00149958

Key Documents

View All Documentation
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

cation traces

Na: ≤0.01%, Ca: ≤0.05%, Fe: ≤0.001%, K: ≤0.05%, heavy metals (as Pb): ≤0.001%

InChI key

WZUKKIPWIPZMAS-UHFFFAOYSA-K

InChI

1S/Al.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3

SMILES string

[Al+3].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H][N+]([H])([H])[H].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O

grade

ACS reagent

assay

≥98%, 98.0-102.0% (ACS specification)

impurities

≤0.005% insolubles

mp

93.5 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%

Looking for similar products? Visit Product Comparison Guide

General description

Ammonium aluminum sulfate dodecahydrate commonly called as ammonium alum is widely used in water purification, cosmetic formulation, fertilizers and food preservation. Its thermal decomposition has been studied. It has high latent heat of 251 kJ kg-1 with a potential use in the heating system. Its utility as a flame-retardant for cotton fabric has been analyzed.

Application

Ammonium aluminum sulfate dodecahydratemay be used in the preparation of Alum (Al(OH)3) gel.

Storage Class

11 - Combustible Solids

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
MKCM5293
MKBZ8506V
MKBZ5340V
MKBW4448V
MKBS3589V

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Thermogravimetry of deposited ammonium aluminum sulfate dodecahydrate used as flame-retardant for cotton fabrics.
Mostashari SM and Mostashari SZ.
Cellulose Chemistry and Technology, 43(9), 455-455 (2009)
Preventive and curative glycoside kaempferol treatments attenuate the TH2-driven allergic airway disease.
Medeiros KCP, et al.
International Immunopharmacology, 9(13), 1540-1548 (2009)
Flow and heat transfer characteristics of ammonium alum hydrate slurries.
Suzuki H, et al.
International Journal of Refrigeration, 36(1), 81-87 (2013)
Thermal characterization of ammonium alum.
Lopez-Beceiro J, et al.
Journal of Thermal Analysis and Calorimetry, 104(1), 127-130 (2010)
[A method for determining ammonium alum-based aerosol-forming dusts in mine air].
R V Gorskaia et al.
Gigiena truda i professional'nye zabolevaniia, (2)(2), 46-47 (1989-01-01)
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service