N-(n-Butyl)thiophosphoric triamide

N-(n-Butyl)thiophosphoric triamide (NBPT) is the organophosphorus compound with the formula SP(NH2)2(NHC4H9). A white solid, NBPT is an "enhanced efficiency fertilizer", intended to limit the release of nitrogen-containing gases following fertilization.[1] Regarding its chemical structure, the molecule features tetrahedral phosphorus bonded to sulfur and three amido groups.

N-(n-Butyl)thiophosphoric triamide
Names
Other names
Agrotain
N-Butylphosphorothioic triamide
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.103.392
EC Number
  • 435-740-7
UNII
  • InChI=1S/C4H14N3PS/c1-2-3-4-7-8(5,6)9/h2-4H2,1H3,(H5,5,6,7,9)
    Key: HEPPIYNOUFWEPP-UHFFFAOYSA-N
  • CCCCNP(=S)(N)N
Properties
C4H14N3PS
Molar mass 167.21 g·mol−1
Appearance white solid
Melting point 54 °C (129 °F; 327 K)
Hazards
GHS labelling:
GHS05: CorrosiveGHS08: Health hazard
Danger
H318, H361
P201, P202, P280, P281, P305+P351+P338, P308+P313, P310, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Use

NBPT functions as an inhibitor of the enzyme urease.[2] Urease, pervasive in soil microorganisms, converts urea into ammonia, which is susceptible to volatilization if produced faster than it can be utilized by plants. Approximately 0.5% by weight NBPT is mixed with the urea.[3]

See also

References
  1. Rose, Terry J.; Wood, Rachel H.; Rose, Michael T.; Van Zwieten, Lukas (2018). "A re-evaluation of the agronomic effectiveness of the nitrification inhibitors DCD and DMPP and the Urease Inhibitor NBPT". Agriculture, Ecosystems & Environment. 252: 69–73. doi:10.1016/j.agee.2017.10.008.
  2. Pan, Baobao; Lam, Shu Kee; Mosier, Arvin; Luo, Yiqi; Chen, Deli (2016). "Ammonia Volatilization from Synthetic Fertilizers and its Mitigation Strategies: A Global Synthesis". Agriculture, Ecosystems & Environment. 232: 283–289. doi:10.1016/j.agee.2016.08.019.
  3. Zaman, M.; Zaman, S.; Quin, B.F; Kurepin, L.V; Shaheen, S.; Nawaz, S.; Dawar, K.M (2014). "Improving Pasture Growth and Urea Efficiency Using N inhibitor, Molybdenum and Elemental Sulphur". Journal of Soil Science and Plant Nutrition. doi:10.4067/S0718-95162014005000020.
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