Ultrasol® SOP 52

Ultrasol® SOP 52 is a fully water- soluble K source without nitrogen for the final phase of the growth cycle. Its acidic pH helps to prevent blockage of nozzles and drip lines of irrigation systems.

  • Ultrasol® SOP 52 is free of chloride, sodium and heavy metals.
  • It`s a free- flowing crystalline powder that quickly dissolves in water.
  • Can be mixed with all water-soluble fertilizers other than calcium-containing products.
  • The high concentration of potassium and the absence of nitrogen and phosphate enable the correct quantity of potassium to be supplied at any stage.
  • In alkaline soils, Ultrasol® SOP 52 lowers the pH in the rhizosphere, helping to improve availability of phosphates and certain trace elements. In drip irrigation solutions, it helps to reduce the pH of the irrigation water.
  • Is the most concentrated, chloride- free potassium (K2O) source in the market.

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Potassium oxide (K2O)


Potassium (K)


Sulphate oxide (SO4)


Sulphate (S)


Solubility (20°C)

70 g/l water



EC (1 g/l at 25°C, in mS/cm)



Crystalline, odourless



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Compatibilidad de Ultrasol® SOP 52 con otros productos:
YES: 100% Compatible products in the dissolution tank. NO: Products that never be mixed in the dissolution tank. R: Restricted mixtures, at hight concentrations precipitates could turn out. P: Products that should be mixed with precaution, follow thisorder: 1ª water, 2ª specialty nutrient and 3ª acid.
A: Upon mixing in the dissolution tank, make sure the pH of the mixture does not drop below 4. L: When mixing these products with any Ultrasol® product, maintain the following proportion: 30kg. of Utrasol® for every 1kg, of any another specialty nutrient. E: Compatible only in the main tank at the time of injection.

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Additional information associated with a nutrient Potassium

This product is recommended for

All the information is given to the best of SQM's knowledge and is believed to be accurate. Your conditions of use and application of the suggested products and recommendations are beyond our control. There is no warranty regarding the accuracy of any given data or statements. SQM specifically disclaims any responsibility or liability relating to the use of the suggested products and recommendations and shall under no circumstances whatsoever, be liable for any special, incidental or consequential damages which may arise from such use.

Note: Some products not be available in certain markets.