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31242 Sigma-Aldrich

Aluminum potassium sulfate dodecahydrate

puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99.5%

Synonym: Alum, Potassium alum, Potassium aluminum sulfate dodecahydrate

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Properties

Related Categories A-B, Puriss p.a. ACS, Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Essential Chemicals,
grade   ACS reagent, reag. Ph. Eur.
InChI Key   GNHOJBNSNUXZQA-UHFFFAOYSA-J
grade   puriss. p.a.
assay   ≥99.5%
impurities   ≤0.005% ammonium (NH4)
pH   3.0-3.5 (20 °C, 10%)
mp   92 °C (lit.)
density   1.757 g/mL at 25 °C (lit.)
anion traces   chloride (Cl-): ≤5 mg/kg
cation traces   As: ≤2 mg/kg
  Cd: ≤5 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤5 mg/kg
  Na: ≤100 mg/kg
  Pb: ≤10 mg/kg

Description

General description

Aluminum potassium sulfate dodecahydrate is an inorganic sulfate salt of aluminum and potassium. Linear growth rates of (100), (111) and (110) faces of its crystals have been investigated.

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
1
RTECS 
WS5690000

Documents

Certificate of Analysis

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Protocols & Articles
Peer-Reviewed Papers
15

References

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