Potassium Hydrogen Phthalate | Primary Standard ACS, 99.95 – 100.05%, 250g
Description
Potassium hydrogen phthalate [PN: T-06-175] is used as a primary standard for acid- base titrations as well as for calibrating pH meters and for the preparation of volumetric alkali solutions. It acts as buffer in pH determination. It finds application as a useful standard for total organic carbon testing. Considered a classic primary standard substance in that it is readily available in high purity.
KHP is used in the manufacture of buffers, organic carbon standards, acidimetric standards and other products. It is also used in the quality control of Potassium Hydroxide and Sodium Hydroxide solutions, and in the standardization of Perchloric Acid in Glacial Acetic Acid. A typical acidimetric reaction is:
KHPhthalate + KOH → K2Phthalate + H2O
Phenolphthalein Indicator is most commonly used in titrations where KHP is used as an acidimetric standard to standardize solutions of bases. When KHP is used as a basimetric standard (e.g., in standardization of Perchloric Acid in Glacial Acetic Acid), Methyl Violet or Crystal Violet indicator is commonly used.
Features
- Relatively inexpensive
- Easy to dry
- Neither hygroscopic, oxidized by air, nor affected by Carbon Dioxide (thus making it easy to weigh out)
- Does not undergo decomposition during storage
- Has a relatively high equivalent weight (thus reducing errors when weighed to 0.1 mg precision)
- Readily soluble in water
- Stoichiometric and instantaneous in reactions.
- Solubility: Soluble in water; slightly soluble in alcohol
- Note: Incompatible with strong oxidizing agents.
Applications
- Used as a primary standard for acid- base titrations
- For calibrating pH meters
- Preparation of volumetric alkali solutions
Acts as buffer in pH determination - Useful standard for total organic carbon testing
For further questions or inquiries about our products, please Contact Us.
