Linear Formula : KAl(SO₄)₂ · 12 H₂O
CAS Number : 7784-24-9
Molecular Weight : 474.39
UNSPSC Code : 12352302
EC Index Number : 233-141-3
NACRES : NA.21
MDL Number : MFCD00149143
Assay : 99.0-100.5% (complexometric)
Grade : ACS Reagent
Form : Solid
Quality Segment : 300
Agency : Reag. Ph. Eur.
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: ≤0.001% (ACS)
Storage Temp. : 2-30°C