Potassium hydrogen phthalate is a primary standard acidimetric compound used in analytical chemistry, pH calibration, and volumetric titrations. Its stability as a solid, air-stable salt with a precise pKa value (5.4) makes it ideal for standardizing bases and calibrating pH meters.
With high purity (99.95% ACS primary standard), high equivalent weight, and excellent solubility, it supports accurate laboratory measurements with minimal errors. Non-hygroscopic and non-decomposing nature ensures 2-year shelf stability suitable for precise analytical work.
| Sr. No. | Description | Specification |
|---|---|---|
| 1 | Purity | 99.95% minimum |
| 2 | Chemical Formula | C₈H₅KO₄ |
| 3 | Form | White crystalline powder |
| 4 | Country of origin | India |
| 5 | Quantities | Available in analytical quantities, typically 500 g to 25 kg |
White crystalline solid with molecular weight 204.22 g/mol; melting point 295–300°C.
Soluble in water (80 g/L at 20°C); pKa 5.4, providing pH buffering capability for a pH 4.0–6.0 range.
Solid and air-stable; non-hygroscopic nature allows accurate weighing without correction factors.
Chemically inert; does not decompose in storage or oxidize when exposed to air.
Primary standard for acidimetric titrations to standardize base solutions (KOH, NaOH) with high precision.
pH buffer and calibration standard for pH meter calibration at pH 4.00 reference point.
Laboratory reagent in volumetric analysis and quality control for chemical standardization.
Component in analytical standards for various organic carbon measurements and analytical chemistry protocols.
ACS primary standard grade (99.95%) with NIST traceability; batch-specific certificates of analysis provided.
Non-toxic; minimal hazards; standard laboratory PPE sufficient for handling.
Store in cool, dry place in sealed containers; indefinite shelf life under proper conditions.
Stable and reliable; no special storage precautions required beyond normal chemical storage practices.
| Sr. No. | Description | Specification |
|---|---|---|
| 1 | Purity | 99.95% minimum |
| 2 | Chemical Formula | C₈H₅KO₄ |
| 3 | Form | White crystalline powder |
| 4 | Country of origin | India |
| 5 | Quantities | Available in analytical quantities, typically 500 g to 25 kg |
White crystalline solid with molecular weight 204.22 g/mol; melting point 295–300°C.
Soluble in water (80 g/L at 20°C); pKa 5.4, providing pH buffering capability for a pH 4.0–6.0 range.
Solid and air-stable; non-hygroscopic nature allows accurate weighing without correction factors.
Chemically inert; does not decompose in storage or oxidize when exposed to air.
Primary standard for acidimetric titrations to standardize base solutions (KOH, NaOH) with high precision.
pH buffer and calibration standard for pH meter calibration at pH 4.00 reference point.
Laboratory reagent in volumetric analysis and quality control for chemical standardization.
Component in analytical standards for various organic carbon measurements and analytical chemistry protocols.
ACS primary standard grade (99.95%) with NIST traceability; batch-specific certificates of analysis provided.
Non-toxic; minimal hazards; standard laboratory PPE sufficient for handling.
Store in cool, dry place in sealed containers; indefinite shelf life under proper conditions.
Stable and reliable; no special storage precautions required beyond normal chemical storage practices.
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