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1.01031 Supelco

Aluminium ammonium sulfate dodecahydrate

for analysis EMSURE® ACS

Synonym: Alum ammonium, Ammonium alum, Aluminium ammonium sulfate dodecahydrate

  • CAS Number 7784-26-1

  • Linear Formula NH4Al(SO4)2 · 12 H2O

  • Molecular Weight 453.33

  •  MDL number MFCD00149958

  •  EC Index Number 232-055-3

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Properties

Quality Level   300
grade   ACS reagent
assay   99.0-102.0% (complexometric)
form   solid
pH   2.6 (25 °C, 100 g/L in H2O)
bp   200 °C/1013 hPa
mp   93 °C
bulk density   700‑800 kg/m3
anion traces   chloride (Cl-): ≤0.0005%
  nitrate (NO3-): ≤0.001%
cation traces   As: ≤ 0.00005%
  Ca: ≤ 0.05%
  Cr: ≤ 0.0005%
  Fe: ≤ 0.0002%
  K: ≤ 0.005%
  Mn: ≤ 0.0005%
  Na: ≤ 0.005%
  heavy metals (as Pb): ≤ 0.001%
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
InChI key   WZUKKIPWIPZMAS-UHFFFAOYSA-K
storage conditions   Store at +5°C to +30°C.

Description

Analysis Note

Assay (complexometric): 99.0 - 102.0 %
Insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.0005 %
Nitrate (NO₃): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.001 %
As (Arsenic): ≤ 0.00005 %
Ca (Calcium): ≤ 0.05 %
Cr (Chromium): ≤ 0.0005 %
Fe (Iron): ≤ 0.0002 %
K (Potassium): ≤ 0.005 %
Mn (Manganese): ≤ 0.0005 %
Na (Sodium): ≤ 0.005 %
Corresponds to ACS

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