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Potassium dihydrogen Phosphate 99-102.00% Anhydrous ACS, FG

Price: £3.95
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Stock Availability
On Shelf - Approx. UK delivery date: Tuesday the 07th October 2025*
In bulk stock - ships within 10 - 12 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, Jersey and Guernsey.

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
  • Fertiliser
  • Fungicide
  • In aquariums to bring Phosphate Levels Up
  • Buffering Agent

Monopotassium phosphate, MKP, (also potassium dihydrogen phosphate, KDP, or monobasic potassium phosphate), KH2PO4, is a soluble salt of potassium and the dihydrogen phosphate ion which is used as a fertilizer, a food additive and a fungicide. It is a source of phosphorus and potassium. It is also a buffering agent. When used in fertilizer mixtures with urea and ammonium phosphates, it minimises escape of ammonia by keeping the pH at a relatively low level.

  • Minimum Assay: >100.2%
  • Molecular Formula: KH2PO4
  • Molecular Weight: 136.09 g/mol
  • Melting Point: 252.6 °C
  • pH (1% Solution): 4.2 - 4.8
  • Lead (Pb): <1ppm
  • Arsenic (As): <1ppm
  • Cadmium (Cd): <1ppm
  • Mercury (Hg): <1ppm
  • Fluroide (F): < 10ppm

Hazard Phrases: Not considered harmful under normal laboratory conditions

Cas No: 7778-77-0
Einecs No: 231-913-4

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Source Chemicals Ltd