Sigma-Aldrich
Potassium Phthalate Monobasic, ACS Reagent, Acidimetric Standard, 500 grams
- Part Number:
- MIL-179922-500G
- Lead Time:
- 2-3 weeks
- Shipping:
- FREE SHIPPING on most orders over $50*
- Quantity:
- each
- Size:
- 500 grams
- Style:
- chemical
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Description
Potassium Phthalate Monobasic ACS Reagent, Acidimetric Standard &, 500 Gram
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.
Safety Information
RIDADR NONH for all modes of transport
WGK Germany 2
RTECS CZ4326000
Warnings
Note: These chemicals are for research & laboratory use only. Your order will not be processed if you do not work for, and ship to, a registered laboratory or research facility. Not for topical applications. An official Declaration of Use form may be required.
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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. Prop 65 Warning
Please note: This product is not returnable.