tripotassium phosphate

• ChemBase ID: 130029
• Molecular Formular: K3O4P
• Molecular Mass: 212.266261
• Monoisotopic Mass: 211.84454015
• SMILES: [K+].[K+].[K+].[O-]P(=O)([O-])[O-]
• Canonical SMILES: [O-]P(=O)([O-])[O-].[K+].[K+].[K+]
• InChI: InChI=1S/3K.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3
• InChIKey: LWIHDJKSTIGBAC-UHFFFAOYSA-K

NAMES AND DATABASE IDS

Names

• IUPAC name: tripotassium phosphate
• IUPAC Traditional name: tripotassium phosphate
• Synonyms: Tripotassium phosphate; Potassium phosphate; tribasic; Tripotassium phosphate; Potassium phosphate tribasic; Phosphate buffer; Potassium phosphate buffer solution; Buffer solution HPCE pH 3.0; Potassium phosphate buffer solution; Buffer solution from phosphoric acid/Potassium dihydrogen phosphate; Phosphoric acid/Potassium dihydrogenphosphate solution; Potassium phosphate, tribasic monohydrate; Potassium phosphate monohydrate; Potassium phosphate, tribasic; Potassium phosphate, anhydrous; 正磷酸钾; 磷酸三钾; Phosphate buffer; 磷酸钾缓冲液 溶液; 用于 HPCE 的 pH 3.0 缓冲溶液; 磷酸/磷酸二氢钾 溶液; 磷酸/磷酸二氢钾缓冲溶液; 磷酸钾缓冲液 溶液; 磷酸钾单水合物; 磷酸钾, 无水

Database IDs

• CAS Number: 7778-53-2; 27176-10-9
• EC Number: 231-907-1
• MDL Number: MFCD00036295; MFCD00150410
• Merck Index: 147660
• PubChem SID: 24887492; 24888014; 162224314; 24898681
• PubChem CID: 62657
• Chemspider ID: 56408
• Wikipedia Title: Tripotassium_phosphate

CALCULATED PROPERTIES

• Acid pKa: 1.7961261
• H Acceptors: 4
• H Donor: 0
• LogD (pH = 5.5): -3.3916447
• LogD (pH = 7.4): -3.9718332
• Log P: -1.0201038
• Molar Refractivity: 11.2868 cm^3
• Polarizability: 5.564544 Å^3
• Polar Surface Area: 86.25 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: 90 g/100 mL (20 °C) in water; insoluble in alcohol; Soluble in water. Insoluble in alcohol
• Apperance: Granular; white powder ; deliquescent
• Melting Point: 1340°C; 1380 °C
• Flash Point: Non-flammable
• Density: 1.050 g/mL at 20 °C; 2.564; 2.564 g/cm^3 (17 °C); 2.564 g/mL at 25 °C(lit.)
• Absorption Wavelength: λ: 210 nm Amax: 0.05; λ: 220 nm Amax: 0.04; λ: 230 nm Amax: 0.03; λ: 300 nm Amax: 0.02; λ: 500 nm Amax: 0.02
• pKb: 1.6
• Conductivity: ~9.5 mS/cm at 20 °C
• Fluorescence: λex 200-600 nm; λem 300-800 nm (corresponds)
• pH: 1.9; 3.0 (25 °C)

Safety Information

• Storage Warning: Hygroscopic
• RTECS: TC8450000
• European Hazard Symbols: Irritant (Xi)
• UN Number: 1805
• German water hazard class: 1; 2
• Hazard Class: 8
• Packing Group: 3
• Risk Statements: 36/38; 38-41; R36, R38
• Safety Statements: 26; 26-37; 26-39; S26, S36
• TSCA Listed: 是
• EU Index: Not listed
• GHS Pictograms: GHS05; GHS07
• GHS Signal Word: Danger
• Main Hazard: Irritant
• NFPA704:
  

  0

  2

  0
• GHS Hazard statements: H314; H315-H318; H315-H319; H315-H319-H313
• GHS Precautionary statements: P280-P305 + P351 + P338; P280-P305 + P351 + P338-P310; P280-P305+P351+P338-P302+P352-P321-P362-P312; P280-P305+P351+P338-P302+P352-P321-P362-P332+P313
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves; Faceshields, Gloves, Goggles
• RID/ADR: UN 1805 8/PG 3

Product Information

• Purity: ≥95%; ≥98%; 95%; 97%
• Concentration: 150 mM potassium phosphate
• Grade: for HPCE; for HPLC; puriss. p.a.; purum; reagent grade
• Suitability: corresponds to standard for filter test; corresponds to standard for RP gradient test; in accordance for HPCE; suitable for detection of free chlorine (DPD method)
• Shelf Life: (limited shelf life, expiry date on the label)
• Loss on Drying: ≤4% loss on ignition, 800 °C
• Quality: ampule
• λ: in concentrate
• abs.: UV absorption/200-800 nm in accordance
• Linear Formula: K3PO4

DETAILS

Sigma Aldrich - 82622

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter

Sigma Aldrich - 79628

Application
recommendation for use in ion pair chromatography
Packaging
concentrate (~0.33 M each) in ampules for 6x1 l 0.005 M ready-to-use solution (each component)

Sigma Aldrich - P5629

包装
1 kg in poly bottle
10 kg in poly drum
25, 500 g in poly bottle