$261
- Part Number: MIL-179922-1KG
- Lead Time: 7-14 days
- Quantity: each
- Size: 1 kg
- Style: chemical
Potassium Phthalate Monobasic ACS Reagent, Acidimetric Standard & 1 Kg
Synonym: KHP, Phthalic acid monopotassium salt, Potassium biphthalate, Potassium hydrogen phthalate
- CAS Number 877-24-7
- Linear Formula HOOCC6H4COOK
- Molecular Weight 204.22
- Beilstein/REAXYS Number 3637128
- EC Number 212-889-4
- MDL number MFCD00013070
- PubChem Substance ID 24850834
| Grade | ACS reagent |
| Assay | 99.95-100.05% dry basis |
| Quality | acidimetric standard |
| Impurities | ≤0.002% S compounds
≤0.003% Cl compounds ≤0.005% insolubles |
| PH | 4.00-4.02 (25.0°C±0.2°C, 0.05 M) |
| mp | 295-300°C (dec.) (lit.) |
| Cation traces | Fe: ≤5 ppm
Na: ≤0.005% heavy metals (as Pb): ≤5 ppm |
Application
Potassium phthalate monobasic may be used as a primary standard in acidimetric titration[1] and also to prepare potassium phthalate buffer solution for pH calibration.
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