Ammonium alum | CAS No. 7784-26-1

Ammonium alum

Basic Information

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CAS Number

7784-26-1

Molecular Formula

H28AlNO20S2

Molecular Weight

449.3 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Basic Chemical Raw Materials Organic Chemicals Amines

Water Treatment Chemicals Coagulants and Flocculants Inorganic Coagulants

Basic Physical Properties

Melting Point

93.5 °C

Boiling Point

200 ºC

Density

1.64

Water Solubility

Soluble in water and glycerol. Insoluble in alcohol.

Solubility

H2O: 0.1 M at 20 °C, clear, colorless

SMILES

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[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

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

InChIKey

WZUKKIPWIPZMAS-UHFFFAOYSA-K

LogP

-0.57230

Complexity

62.2

Safety Information

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GHS Hazard Pictograms

H315

H319

H335

Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Stability

Stable.

Sensitiveness

对湿度敏感

Synonyms & References

English

Aluminum ammonium sulfate dodecahydrate, Reagent Grade
Aluminum ammonium sulfate dodecahydrate
Aluminum ammonium sulfate
Aluminium Ammonium Sulfate 12-Water
aluminum,azanium,disulfate,dodecahydrate
Ammonium aluminum sulfate dodecahydrate
Acacia
AMMONIUM ALUM
Sulfuricacid, aluminum ammonium salt (2:1:1), dodecahydrate (8CI,9CI)
Aluminum ammoniumbis(sulfate) dodecahydrate
Aluminum ammonium disulfate dodecahydrate
Aluminumammonium sulfate (Al(NH4)(SO4)2) dodecahydrate
Sulfuric acid, aluminumammonium salt, hydrate (2:1:1:12)
Ammonia alum
Ammonium alum (NH4Al(SO4)2.12H2O)
Ammonium aluminum disulfate dodecahydrate
Ammonium aluminum sulfate hydrate
Monoaluminum monoammoniumdisulfate dodecahydrate
Ammonium aluminum sulfatedodecahydrate
Aluminium ammonium sulfate dodecahydrate
Alum, ammonium [USP]
5C36DRL9ZN
Aluminum ammonium bis(sulfate) dodecahydrate
Sulfuric acid, aluminum ammonium salt (2:1:1), dodecahydrate
Monoaluminum monoammonium disulfate dodecahydrate
aluminum(III)ammoniumsulfatedodecahydrate
NS00129131
ALUMINUM AMMONIUM SULFATE DODECAHYDRATE [MI]
ALUMINUM AMMONIUM SULPHATE DODECAHYDRATE
Ammonium aluminum sulfate dodecahydrate, ReagentPlus(R), >=99% (titration)
ammonium alum dodecahydrate

MDL Number

MFCD00000053

FAQ

What is Ammonium alum (CAS: 7784-26-1)?

Ammonium alum (CAS: 7784-26-1) is a hydrated double sulfate of aluminum and ammonium. Its chemical formula is NH4Al(SO4)2·12H2O. It is a white crystalline powder with a characteristic sweet and astringent taste. It is insoluble in alcohol but soluble in water.

What are the main uses of Ammonium alum (CAS: 7784-26-1)?

Ammonium alum (CAS: 7784-26-1) is widely used in various industries. It serves as a mordant in dyeing and tanning, a leavening agent in baking, a water purifier, and a pH adjuster. It is also used in manufacturing fertilizers and as a flocculant in wastewater treatment.

Is Ammonium alum (CAS: 7784-26-1) safe?

Ammonium alum (CAS: 7784-26-1) is considered safe for most applications when used according to recommended guidelines. It is not considered flammable, but it can release toxic fumes if heated. Proper handling precautions include wearing gloves and safety goggles, and ensuring adequate ventilation. It is important to follow safety standards and avoid ingestion or inhalation of dust.

How should Ammonium alum (CAS: 7784-26-1) be stored?

Ammonium alum (CAS: 7784-26-1) should be stored in a cool, dry place, away from direct sunlight and heat sources. It is stable in normal conditions but should be protected from moisture to avoid degradation. Use airtight containers to prevent moisture absorption. It is advisable to store it in a well-ventilated area to minimize the risk of fire due to the release of toxic fumes if heated.