Potassium chloride, commercially known by the English acronym MOP (muriate of potash), is the most common source of potassium in fertilisers. Its K2O content reaches at least 60.0% under Indian technical specifications, with a maximum moisture level of 0.5%[1]. The product comes in two main forms: a standard grade with a finer particle size and a granular grade sought after for compound fertilisers and bulk blends. In the United States, the average mine-gate f.o.b. price for MOP was estimated at 600 USD per metric tonne of K2O equivalent in 2025, compared with 690 USD/t in 2024[2]. MOP accounts for the dominant share of potash products traded worldwide, alongside potassium sulphate used for chloride-sensitive crops[2].
Sources
- FAO, Plant nutrition for food security (2006), p. 349 · View the source
- USGS, Mineral Commodity Summaries 2026, Potash, p. 1 · View the source
Original text by fertiliser-market.com. Facts and figures are taken from the documents cited, at the page given; no text, table or chart is reproduced from them.
Updated November 3, 2026