dipotassium carbonate

• ChemBase ID: 103661
• Molecular Formular: CK2O3
• Molecular Mass: 138.2055
• Monoisotopic Mass: 137.91215722
• SMILES: [K+].[K+].[O-]C(=O)[O-]
• Canonical SMILES: [O-]C(=O)[O-].[K+].[K+]
• InChI: InChI=1S/CH2O3.2K/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2
• InChIKey: BWHMMNNQKKPAPP-UHFFFAOYSA-L

NAMES AND DATABASE IDS

Names

• IUPAC name: dipotassium carbonate
• IUPAC Traditional name: dipotassium carbonate; dipotassium ion CO3
• Synonyms: Potash; pearl ash; Potassium carbonate; Potassium carbonate, Puratronic®; Potassium carbonate, anhydrous; Potassium carbonate, ACS; Potassium carbonate; Carbonic Acid Dipotassium Salt; POTASSIUM CARBONATE, ACS; 碳酸钾, Puratronic®; 碳酸钾,无水; 碳酸钾, ACS; 碳酸钾

Database IDs

• CAS Number: 584-08-7
• EC Number: 209-529-3
• MDL Number: MFCD00011382
• Beilstein Number: 4267587
• Merck Index: 147619
• PubChem SID: 24847700; 162091337; 24861531; 24852581; 24898711; 24847698; 24881291; 24881792; 24898202; 24858785; 24881791; 24862856; 24858893
• PubChem CID: 11430
• Chemspider ID: 10949
• Unique Ingredient Identifier: BQN1B9B9HA
• Wikipedia Title: Potassium_carbonate

CALCULATED PROPERTIES

• Acid pKa: 6.0525417
• H Acceptors: 3
• H Donor: 0
• LogD (pH = 5.5): 0.142811
• LogD (pH = 7.4): -1.1138874
• Log P: 0.25005138
• Molar Refractivity: 31.1724 cm^3
• Polarizability: 3.6386902 Å^3
• Polar Surface Area: 63.19 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: 112 g/100 mL (20 °C) ; 156 g/100 mL (100 °C) in water; ethanol: insoluble; H2O: soluble1 M at 20 °C, clear, colorless; H2O: soluble1 M, clear, colorless; insoluble in alcohol, acetone
• Apperance: Granular; powder; Powder; powder and chunks; white, hygroscopic solid
• Melting Point: 891 °C(lit.); 891°C; 891°C; ca. 890 °C
• Boiling Point: decomposes
• Flash Point: non-flammable
• Density: 2.29; 2.29 g/cm^3; 2.43 g/mL at 25 °C; ca. 2.4 g/cm^3 at 20 °C
• Vapor Pressure: Not volatile
• Absorption Wavelength: λ: 260 nm Amax: 0.03; λ: 280 nm Amax: 0.02
• pH: 11.0-13.0 (25 °C, 1 M in H2O)

Safety Information

• Storage Condition: Room Temperature (15-30°C)
• Storage Warning: Hygroscopic
• RTECS: TS7750000
• European Hazard Symbols: Corrosive (C); X; Harmful (Xn)
• German water hazard class: 1
• Risk Statements: 22-36; 22-36/37/38; R:22-34; R22 R36 R37 R38
• Safety Statements: 22-36-60; 26-36; 26-36/37; S:26-27/28-36/37/39-46-64
• TSCA Listed: 是
• EU Index: Not listed
• GHS Pictograms: GHS07
• GHS Signal Word: Warning
• Main Hazard: Irritant
• NFPA704:
  

  0

  1

  0
• LD50: 1870 mg/kg^-1
• GHS Hazard statements: H302-H315-H319-H335; H302-H319
• GHS Precautionary statements: P261-P305 + P351 + P338; P261-P305+P351+P338-P302+P352-P321-P405-P501A; P280-P264-P305+P351+P338-P301+P312-P337+P313-P501A
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves

Product Information

• Purity: ≥98%; ≥98% (acidimetric); ≥99%; ≥99.0%; ≥99.0% (T); ≥99.5%; 99%; 99.0% min; 99.99% trace metals basis; 99.995% trace metals basis; 99.997% (metals basis); 99-101% (calc. to the dried substance)
• Grade: ACS; ACS reagent; anhydrous; JIS special grade; puriss.; puriss. p.a.; purum p.a.; reag. ISO, reag. Ph. Eur.; REAGENT; reagent grade; ReagentPlus®; SAJ first grade
• Particle Size: -325 mesh
• Suitability: complies for appearance of solution; meets USP testing specifications
• Impurities: ≤0.0005% Phosphorus (P); ≤0.001% heavy metals (as Pb); ≤0.001% total nitrogen (N); ≤0.003% total S (as SO4); ≤0.004% S compounds as (SO42-); ≤0.004% total sulfur (as SO4); ≤0.005% silica; ≤0.01% insolubles; ≤0.1% Insoluble matter; insoluble matter, passes filter test; residual solvents, complies
• Cation Traces: Ag: ≤5 mg/kg; Al: ≤0.0005%; Al: ≤10 mg/kg; Al: ≤5 mg/kg; As: ≤0.1 mg/kg; As: ≤0.5 mg/kg; As: ≤1 mg/kg; As: ≤2 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤0.001%; Ca: ≤0.005%; Ca: ≤10 mg/kg; Ca: ≤20 mg/kg; Ca: ≤50 mg/kg; Cd: ≤5 mg/kg; Cd: ≤50 mg/kg; Co: ≤5 mg/kg; Co: ≤50 mg/kg; Cr: ≤5 mg/kg; Cu: ≤0.0005%; Cu: ≤5 mg/kg; Cu: ≤50 mg/kg; Fe: ≤0.0005%; Fe: ≤10 mg/kg; Fe: ≤5 mg/kg; Fe: ≤5 ppm; Fe: ≤50 mg/kg; heavy metals (as Pb): ≤5 ppm; Li: ≤5 mg/kg; Mg: ≤0.0005%; Mg: ≤0.002%; Mg: ≤10 mg/kg; Mg: ≤5 mg/kg; Mg: ≤50 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Na: ≤0.02%; Na: ≤0.5%; Na: ≤200 mg/kg; Na: ≤2000 mg/kg; Na: ≤500 mg/kg; Na: ≤5000 mg/kg; NH4+: ≤0.05%; Ni: ≤5 mg/kg; Ni: ≤50 mg/kg; Pb: ≤0.001%; Pb: ≤5 mg/kg; Pb: ≤50 mg/kg; Sr: ≤5 mg/kg; Tl: ≤5 mg/kg; Zn: ≤0.0005%; Zn: ≤5 mg/kg; Zn: ≤50 mg/kg
• Antion Traces: chloride (Cl-): ≤0.003%; chloride (Cl-): ≤0.005%; chloride (Cl-): ≤20 mg/kg; chloride (Cl-): ≤30 mg/kg; chloride (Cl-): ≤50 mg/kg; phosphate (PO43-): ≤0.001%; phosphate (PO43-): ≤10 mg/kg; phosphate (PO43-): ≤20 mg/kg; silicate (as SiO2): ≤30 mg/kg; silicate (as SiO2): ≤50 mg/kg; sulfate (SO42-): ≤0.02%; sulfate (SO42-): ≤100 mg/kg; sulfate (SO42-): ≤20 mg/kg; sulfate (SO42-): ≤30 mg/kg; sulfate (SO42-): ≤50 mg/kg
• Loss on Drying: ≤0.8% loss on ignition, 600 °C; ≤1% loss on drying, 120 °C, 5 h; ≤1% loss on drying, 300 °C; ≤1.0% loss on ignition, 600 °C
• Quality: granulated; meets analytical specification of Ph. Helv.; purified
• λ: 1 M in H2O
• Product Line: BioUltra
• Linear Formula: K2CO3

DETAILS

MP Biomedicals - 02152558

Anhydrous
ACS Reagent Grade

Sigma Aldrich - 590681

Packaging
5, 25 g in ampule

Sigma Aldrich - 367877

Packaging
10, 50 g in glass bottle

Sigma Aldrich - 209619

Packaging
100, 500 g in poly bottle
2.5, 12 kg in poly drum

Sigma Aldrich - 60109

Other Notes
Reagent for the decomposition of silicates by fusion1,2

Sigma Aldrich - 347825

Packaging
1, 2.5 kg in poly bottle
12 kg in poly drum
250 g in poly bottle

Sigma Aldrich - 310263

Packaging
1, 2.5 kg in poly bottle
5 kg in poly drum
12, 50 kg in fiber drum
Legal Information
ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

REFERENCES

• In non-aqueous solvents, acts as an economical, moderately-strong base which is widely used in place of other more expensive and hazardous bases in a variety of alkylation and condensation reactions.
• For N-alkylation with alkyl halides, see Dibenzylamine, A11554. For alkylation reactions with dialkyl carbonates, see Dimethyl carbonate, A13104.
• Promotes the Wittig olefination reaction in triglyme: Synth. Commun., 22, 513 (1992), or toluene: Synth. Commun., 22, 1691 (1992).
• See also Cesium carbonate, 12887.