Monopotassium phosphate



Monopotassium phosphate
IUPAC name Potassium dihydrogenphosphate
Other names Monopotassium phosphate;
Potassium phosphate monobasic;
Phosphoric acid,
monopotassium salt
Identifiers
CAS number 7778-77-0
Properties
Molecular formula KH2PO4
Molar mass 136.09 g/mol
Appearance White powder
Density 2.34 g/cm3, solid
Melting point

235°C

Boiling point

400°C, dec

Solubility in water 22 g/100 ml
Hazards
MSDS [http://www.jtbaker.com/msds/englishhtml/p6038.htm
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Monopotassium phosphate (also potassium dihydrogen phosphate, KDP, or monobasic potassium phosphate, MKP) -- pH at a relatively low level.

Fertilizer grade MKP contains 52% P2O5 and 34% K2O, and is labeled 0-52-34. It is often used as a nutrient source in the greenhouse trade and in hydroponics.

It is one of the components of Gatorade and is used as an additive in cigarettes.

At 400°C it decomposes, by loss of water, to potassium metaphosphate (KPO3)

Nonlinear optics use

As a crystal, it is noted for its non-linear optical properties. Used in optical modulators and for non-linear optics such as SHG (second harmonic generation).

Also to be noted is KD*P, Potassium Dineodymium based lasers. Regular KDP has absorbances at this wavelength of around 5-6%/cm of thickness while highly deuterated KDP has absorbances of typically less than 1%/cm.

Gallery

References
     
    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Monopotassium_phosphate". A list of authors is available in Wikipedia.