Potassium phosphate dibasic
SIGALD/60356 - puriss. p.a., ACS reagent, anhydrous, ≥99.0% (T)
Synonym: Dipotassium hydrogenphosphate; Dipotassium phosphate; sec.-Potassium phosphate
CAS Number: 7758-11-4
Empirical Formula (Hill Notation): HK2O4P
Molecular Weight: 174.18
EC Number: 231-834-5
MDL Number: MFCD00011383
Linear Formula: K2HPO4
Product Type: Chemical
anion traces | chloride (Cl-): ≤30 mg/kg |
sulfate (SO42-): ≤50 mg/kg | |
assay | ≥99.0% (T) |
cation traces | Ca: ≤50 mg/kg |
Cd: ≤5 mg/kg | |
Co: ≤5 mg/kg | |
Cr: ≤5 mg/kg | |
Cu: ≤5 mg/kg | |
Fe: ≤10 mg/kg | |
heavy metals: ≤5 ppm (by ICP-OES) | |
Mg: ≤5 mg/kg | |
Mn: ≤5 mg/kg | |
Na: ≤500 mg/kg | |
Ni: ≤5 mg/kg | |
Pb: ≤5 mg/kg | |
Zn: ≤5 mg/kg | |
form | powder or crystals |
grade | ACS reagent |
puriss. p.a. | |
impurities | ≤0.001% total nitrogen (N) |
InChI | 1S/2K.H3O4P/c;;1-5(2,3)4/ |
InChI key | ZPWVASYFFYYZEW-UHFFFAOYSA |
loss | ≤1.0% loss on drying, 105 °C |
pH | 8.5-9.6 (25 °C, 50 mg/mL in H2O) |
Quality Level | 300 |
SMILES string | [K+].[K+].OP([O-])([O-])= |
Application: |
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General description: | Potassium phosphate dibasic is a useful biological buffer having a pH in the range of 8.5-9.6. Potassium phosphate is present in various forms: monobasic (KH2PO4), dibasic (KH2PO4), and tribasic (K3PO4). Potassium phosphate buffers are widely employed in equilibrium dialysis, high performance liquid chromatography (HPLC) and affinity capillary electrophoresis studies. |
RIDADR | NONH for all modes of transport |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | ≥99.0% (T) |
UNSPSC | 12352300 |