Variation ID | Product Code | Pack Size | List Price | Qty | |
---|---|---|---|---|---|
ECE1740-X Letter Box Friendly |
100g Foil Pouch | £9.99 | |||
ECE1740-2X Letter Box Friendly |
250g Foil Pouch | £16.89 | |||
ECE1740-5X Letter Box Friendly |
500g Foil Pouch | £27.79 | |||
GPC1740-X | 100g | £10.99 | |||
GPC1740-2X | 250g | £17.88 | |||
GPC1740-5X | 500g | £30.96 | |||
GPC1740-Y | 1Kg | £55.64 | |||
GPC1740-2.5Y | 2.5Kg | £103.93 | |||
GPC1740-5Y | 5Kg | £186.85 | |||
ECE1740-25Y | 25Kg | £880.88 |
Potassium hydrogen phthalate, often called simply KHP, is an acidic salt compound. It forms white powder, colourless crystals, a colourless solution, and an ionic solid that is the monopotassium salt of phthalic acid. KHP is slightly acidic, and it is often used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately. It is not hygroscopic. It is also used as a primary standard for calibrating pH meters because, besides the properties just mentioned, its pH in solution is very stable.
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%
Cas Number: 877-24-7
Einecs Number: 212-889-4
HS Code / Commodity Code: 2917399000
Hazard Phrases: H0001