CAS 7784-26-1 Ammonium alum - Materials / Alfa Chemistry

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Ammonium alum

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Catalog Number

ACM7784261-2

CAS Number

7784-26-1

Product Name

Ammonium alum

Structure

Category

Electrolytes

Synonyms

ALUMINUM AMMONIUM SULFATE, 12-HYDRATE;ALUMINUM AMMONIUM SULFATE DODECAHYDRATE;ALUMINUM AMMONIUM SULPHATE, DODECHYDRATE;ALUMINUM AMMONIUM SULPHATE HYDRATED;AMMONIUM ALUM;AMMONIUM ALUMINUM SULFATE DODECAHYDRATE;AMMONIUM ALUM SULFATE DODECAHYDRATE;AMMONIUM A

IUPAC Name

aluminum azanium disulfate dodecahydrate

Molecular Weight

453.33

Molecular Formula

AlH₂₈NO₂₀S₂

Canonical SMILES

[NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3]

InChI Key

WZUKKIPWIPZMAS-UHFFFAOYSA-K

Boiling Point

200ºC

Melting Point

93.5ºC

Purity

96%

Density

1.64

Appearance

white crystals or powder

Application

Ammonium alum, also known as ammonium aluminum sulfate, serves a versatile purpose as a general-purpose food additive with a strong astringent taste. This compound, characterized by its colorless and odorless crystals, is particularly valued for its solubility in water and glycerol, making it an effective buffer and neutralizing agent. At room temperature, 1 gram of ammonium alum dissolves in 7 milliliters of water, while its solubility increases significantly in boiling water, requiring only 0.3 milliliters per gram. Widely used in baking powders, it also plays a critical role in various manufacturing processes, including the production of medicines, as well as in dyeing, tanning, and papermaking.

EC Number

616-522-2

Exact Mass

456.07000

Hazard Statements

Xi:Irritant

Safety Description

S26-S36

Stability

Stable.

WGK Germany

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