Merck
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1.01047

Supelco

Aluminium potassium sulfate dodecahydrate

for analysis EMSURE® ACS,Reag. Ph Eur

Synonym(s):
Aluminium potassium sulfate dodecahydrate, Potassium aluminium sulfate, Alum potassium, Potassium alum
Linear Formula:
KAl(SO4)2 · 12 H2O
CAS Number:
Molecular Weight:
474.39
MDL number:
EC Index Number:
233-141-3

Quality Level

grade

ACS reagent

Agency

reag. Ph. Eur.

product line

EMSURE®

assay

99.0-100.5% (complexometric)

form

solid

impurities

≤0.005% Insoluble matter

pH

3.0-3.5 (20 °C, 100 g/L in H2O)

mp

92.5 °C

density

1.75 g/cm3 at 20 °C

bulk density

900 kg/m3

anion traces

chloride (Cl-): ≤0.0005%

cation traces

Cd: ≤0.0005%
Cu: ≤0.0005%
Fe: ≤0.0005%
NH4+: ≤0.005%
Na: ≤0.005%
Pb: ≤0.0005%
heavy metals (as Pb): ≤0.001%

storage temp.

2-30°C

InChI

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

InChI key

GNHOJBNSNUXZQA-UHFFFAOYSA-J

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Analysis Note

Assay (complexometric): 99.0 - 100.5 %
Identity: passes test
Appearance of solution: passes test
Insoluble matter: ≤ 0.005 %
pH-value (10 %; in water): 3.0 - 3.5
Chloride (Cl): ≤ 0.0005 %
Heavy metals (as Pb): ≤ 0.001 %
Cd (Cadmium): ≤ 0.0005 %
Cu (Copper): ≤ 0.0005 %
Fe (Iron): ≤ 0.0005 %
Na (Sodium): ≤ 0.005 %
NH₄ (Ammonium): ≤ 0.005 %
Pb (Lead): ≤ 0.0005 %
Corresponds to ACS,Reag. Ph Eur

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

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