Merck
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1.04928

Supelco

Potassium carbonate

for analysis EMSURE® ACS,ISO,Reag. Ph Eur

Synonym(s):
Potassium carbonate, potash
Empirical Formula (Hill Notation):
CK2O3
CAS Number:
Molecular Weight:
138.21
MDL number:
EC Index Number:
209-529-3

Quality Level

grade

ACS reagent

Agency

reag. ISO
reag. Ph. Eur.

product line

EMSURE®

assay

≥99.0% (acidimetric)
≥99.0% dry basis (acidimetric)

form

solid

potency

>2000 mg/kg LD50, oral (Rat)

impurities

≤0.005% Insoluble matter
≤0.01% Substances precipitated by ammonia

loss

≤1% loss on drying, 300 °C

pH

11.5-12.5 (20 °C, 50 g/L in H2O)

mp

891 °C

density

2.43 g/cm3 at 20 °C

bulk density

750 kg/m3

anion traces

chloride (Cl-): ≤0.003%
phosphate (PO43-): ≤0.001%
silicate (as SiO2): ≤0.005%
sulfur compounds (as SO42-): ≤0.003%

cation traces

Ca: ≤0.002%
Cu: ≤0.0005%
Fe: ≤0.0005%
Mg: ≤0.001%
N: ≤0.001%
Na: ≤0.02%
Pb: ≤0.0005%
heavy metals: ≤0.0005%

storage temp.

2-30°C

InChI

1S/CH2O3.2K/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2

Inchi Key

BWHMMNNQKKPAPP-UHFFFAOYSA-L

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Related Categories

Linkage

Replaces: PX1390; PX1390-1; PX1390-20

Analysis Note

Assay (acidimetric; calculated on dried substance): ≥ 99.0 %
Assay (acidimetric): ≥ 99.0 %
Insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.003 %
Phosphate (PO₄): ≤ 0.001 %
Silicate (SiO₂): ≤ 0.005 %
Total sulfur (as sulfate): ≤ 0.003 %
Total nitrogen (N): ≤ 0.001 %
Heavy metals (ACS): ≤ 0.0005 %
Ca (Calcium): ≤ 0.002 %
Cu (Copper): ≤ 0.0005 %
Fe (Iron): ≤ 0.0005 %
Mg (Magnesium): ≤ 0.001 %
Na (Sodium): ≤ 0.02 %
Pb (Lead): ≤ 0.0005 %
Substances precipitated by ammonia: ≤ 0.01 %
Loss on drying (300 °C): ≤ 1.0 %
Corresponds to ACS, ISO, Reag. Ph Eur

Legal Information

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

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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