Surf Wiki
Save to docs
general/phosphates

From Surf Wiki (app.surf) — the open knowledge base

Urea phosphate

Urea phosphate is a 1:1 combination of urea and phosphoric acid that is used as a fertilizer. It has an NPK formula of 17-44-0, and is soluble in water, producing a strongly acidic solution.

Urea phosphate is available in fertilizer vendor bags that carry a UP signet on the packaging. It is sometimes added to blends which contain calcium nitrate, magnesium nitrate and potassium nitrate to produce water-soluble formulas such as 15-5-15 and 13-2-20. The acidity of urea phosphate allows Ca, Mg and P to co-exist in solution. Under less acidic conditions, there would be precipitation of Ca–Mg phosphates. Urea phosphate is often used in drip irrigation to clean pipe systems.

The phosphoric acid and urea molecules in the urea phosphate crystal structure form a complex hydrogen-bonding network, with the hydrogen atoms bonding more strongly to urea molecules. It freely dissociates when dissolved in water.

Urea phosphate is produced as a non-ionic adduct of urea and phosphoric acid, with the typical 17-44-0 grade of fertilizer produced using wet process phosphoric acid at concentrations that vary from 54% to 90%:

References

References

  1. Stinson, John M.. (1977). "Purified Liquid Fertilizers from Wet-process Acid Via Solid Urea Phosphate". National Fertilizer Development Center, Tennessee Valley Authority.
  2. (2022-10-01). "Prevention and treatment of drip emitter clogging: a review of various innovative methods". Water Practice and Technology.
  3. (April 1986). "Urea Phosphate Applied by Subsurface Drip Irrigation Increases Availability of Soil Nitrogen and Phosphorus". Vegetable Report.
  4. (1957). "The crystal structure of urea phosphate". Acta Crystallogr..
  5. (2001-06-01). "Experimental electron density of urea–phosphoric acid (1/1) at 100 K". Acta Crystallographica Section B Structural Science.
  6. (September 1996). "Urea-phosphoric acid complex studied by variable temperature 31P NMR spectroscopy and semiempirical calculations". Journal of Physics and Chemistry of Solids.
  7. (2023-11-14). "Influence of the Process Parameters on the Synthesis of Urea Phosphate and the Properties of the Obtained Product". Crystals.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

phosphates ureas
Want to explore this topic further?

Ask Mako anything about Urea phosphate — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report