1.05073

di-Potassium oxalate monohydrate

for analysis EMSURE^® ACS

• Synonym(s): di-Potassium oxalate monohydrate, Oxalic acid dipotassium salt monohydrate
• Empirical Formula (Hill Notation): C₂K₂O₄ · xH₂O
• CAS Number: 6487-48-5
• Molecular Weight: 166.22 (anhydrous basis)
• MDL number: MFCD00150033
• UNSPSC Code: 12352107
• EC Index Number: 209-506-8
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 300
• vapor pressure: <0.1 hPa ( 20 °C)
• product line: EMSURE^®
• Assay: 99.5-101.0% (oxidimetric)
• form: solid
• potency: 660 mg/kg LD₅₀, oral (Rat)
• impurities: ≤0.01% Insoluble matter
• pH: 7.0-8.5 (20 °C, 50 g/L in H₂O)
• mp: >138 °C (decomposition)
• solubility: 392 g/L (anhydrous substance)
• density: 2.20 g/cm³ at 20.4 °C
• bulk density: 700‑1100 kg/m³
• anion traces: chloride (Cl^-): ≤0.001%; sulfate (SO₄^2-): ≤0.01%
• cation traces: Fe: ≤0.0005%; NH₄⁺: ≤0.002%; Na: ≤0.02%; heavy metals (as Pb): ≤0.001%
• storage temp.: 2-30°C
• InChI: 1S/C2H2O4.2K.H2O/c3-1(4)2(5)6;;;/h(H,3,4)(H,5,6);;;1H2/q;2*+1;/p-2
• InChI key: QCPTVXCMROGZOL-UHFFFAOYSA-L

Description

Analysis Note

Assay (oxidimetric): 99.5 - 101.0 %
Insoluble matter: ≤ 0.01 %
Neutrality: passes test
Chloride (Cl): ≤ 0.001 %
Sulfate (SO₄): ≤ 0.01 %
Heavy metals (as Pb): ≤ 0.001 %
NH₄ (Ammonium): ≤ 0.002 %
Fe (Iron): ≤ 0.0005 %
Na (Sodium): ≤ 0.02 %
Substances darkened by hot sulfric acid: passes test
Corresponds to ACS

Legal Information

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

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H302 + H312 - H319
• Precautionary Statements: P264 - P280 - P301 + P312 - P302 + P352 + P312 - P305 + P351 + P338 - P337 + P313
• Hazard Classifications: Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Irrit. 2
• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1