1.01036

Chromium(III) potassium sulfate dodecahydrate

for analysis EMSURE^® ACS,Reag. Ph Eur

• Synonym(s): Chromium(III) potassium sulfate dodecahydrate, Potassium chromium(III) sulfate, Alum chrome
• Linear Formula: KCr(SO₄)₂ · 12H₂O
• CAS Number: 7788-99-0
• Molecular Weight: 499.40
• MDL number: MFCD00149917
• UNSPSC Code: 12352302
• EC Index Number: 233-401-6
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 300
• agency: reag. Ph. Eur.
• product line: EMSURE^®
• assay: 99.0-102.0% (iodometric)
• form: solid
• impurities: ≤0.01% Insoluble matter
• pH: 3 (20 °C, 50 g/L in H₂O)
• mp: 89 °C
• density: 1.83 g/cm³ at 20 °C
• bulk density: 800‑1000 kg/m³
• anion traces: chloride (Cl^-): ≤0.002%
• cation traces: Al: ≤0.005%; Cu: ≤0.001%; Fe: ≤0.010%; NH₄⁺: ≤0.010%; Pb: ≤0.005%; heavy metals (as Pb): ≤0.01%
• storage temp.: 15-25°C
• InChI: 1S/Cr.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: ZFVHBEKVAITXHW-UHFFFAOYSA-J

Description

Analysis Note

Assay (iodometric): 99.0 - 102.0 %
Identity: passes test
Insoluble matter: ≤ 0.01 %
Chloride (Cl): ≤ 0.002 %
Heavy metals (as Pb): ≤ 0.01 %
Al (Aluminium): ≤ 0.005 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.010 %
NH₄ (Ammonium): ≤ 0.010 %
Pb (Lead): ≤ 0.005 %

Legal Information

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

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315 - H319
• pcodes: P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2
• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 3