Potassium Hydrogen Phthalate 99.5%

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Price: £13.19

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Pack: 2 x 100g

Price: £18.95

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Stock Availability

On Shelf - Approx. UK delivery date: Friday the 29th August 2025*

In bulk stock - ships within 10 - 15 Working Days (Excluding weekends and public holidays)

4 to 6 weeks approx. (Not guaranteed)

UK Shipping

Unfortunately, we are not currently accepting orders for Northern Ireland.

We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.

AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE

* We will always try to ship as early as possible. Delivery could be much quicker than stated but is not guaranteed

Applications

Primary Standard: Used for accurate titration in chemistry.
Calibration Standard: Ensures instrument accuracy.
pH Buffer: Creates solutions with known pH values.
Titration Indicator: Some applications as an endpoint indicator.
Standardisation of NaOH: Used to standardise sodium hydroxide solutions.
Quality Control: Ensures acidity standards in industries.
Education: Commonly used in chemistry teaching.
Research: Vital in various research applications.
Laboratory Reagent: Versatile for chemical analysis.
Drying Agent: Can remove moisture from solvents.

General

What is Potassium Hydrogen Phthalate? It is a chemical compound with the formula C₈H₅KO₄. It is a white, crystalline, and ionic solid, and is commonly used as a primary standard in acid-base titrations, for calibrating pH meters, and in the preparation of volumetric alkali solutions. KHP is also used as a buffer in pH determination and as a standard for total organic carbon testing.

Consistent Quality: We provide only high-quality Potassium Hydrogen Phthalate, ensuring reliable and consistent performance for all applications.

Shipped from Manchester, UK Facility: Sourced and packaged in non-toxic, chemical-resistant containers to ensure safe handling and preserve product quality during transport.

Frequent Uses

Acid-Base Titrations
It serves as a stable, non-hygroscopic, and readily available acid for titrating strong bases like sodium hydroxide.

Instrument Calibration
KHP solutions are used to standardise pH meters and solutions, ensuring accurate pH measurements.

Buffers
Can be used to create buffer solutions in a specific pH range.

Specification

Minimum Assay: <99.5%
Molecular Formula: C8H5KO4
Molecular Weight: 204.22
Solubility in water (% weight): 80 g/L @ 20 C
Melting Point: 295-300 C
Density (g/cm3): 1.64
Insoluble matter: 0.003%
Loss on drying at 110 C: 0.2%
Chloride (Cl): 0.0015%
Phthalic acid: <0.005%
Sulphate (SO4): 0.003%
Copper (Cu): <0.0004%
Iron (Fe): <0.0005%
Sodium (Na): <0.0099%

Hazards

Hazard Phrases: Not considered harmful under normal laboratory conditions

Cas No: 877-24-7

Einecs No: 212-889-4

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Code	Pack	Price
SCPOTHYDPHTH-100G-FOIL	100g Foil Pouch	£13.19
SCPOTHYDPHTH-2X100G-FOIL	2 x 100g	£18.95
SCPOTHYDPHTH-250G-FOIL	250g Foil Pouch	£22.30
GPC1740-X	100g	£14.51
SCPOTHYDPHTH-2X250G-FOIL	2 x 250g	£38.95
GPC1740-2X	250g	£23.60
SCPOTHYDPHTH-500G-FOIL	500g Foil Pouch	£36.68
SCPOTHYDPHTH-2X500G-FOIL	2 x 500g	£72.95
SCPOTHYDPHTH-1KG	1Kg	£69.95
SCPOTHYDPHTH-2X1KG	2 x 1Kg	£129.95
SCPOTHYDPHTH-6X1KG	6 x 1Kg	£349.95
ECE1740-25Y	25Kg	£1162.76
SCPOTHYDPHTH-2.5KG	2.5Kg	£130.66
SCPOTHYDPHTH-2X2.5KG	2 x 2.5Kg	£234.95
SCPOTHYDPHTH-5KG	5Kg	£234.89
SCPOTHYDPHTH-2X5KG	2 x 5Kg	£469.95
SCPOTHYDPHTH-25KG	25Kg	£1162.77

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