An inhibitor of nitrification
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Product Type

Biochemicals

Research Area

Plant Biology

3,4-Dimethylpyrazole (phosphate)

Item No. 21887

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
3,4-dimethyl-1H-pyrazole, monophosphate
CAS Number
202842-98-6
Synonyms
  • 3,4-DMPP
Molecular Formula
C5H8N2 • H3PO4
Formula Weight
194.1
Purity
≥98%
Formulation (Request formulation change)
A crystalline solid
Solubility(Learn about Variance in Solubility)
PBS (pH 7.2): 10 mg/ml
λmax
223 nm
SMILES
CC1=NNC=C1C.OP(O)(O)=O
InChi Code
InChI=1S/C5H8N2.H3O4P/c1-4-3-6-7-5(4)2;1-5(2,3)4/h3H,1-2H3,(H,6,7);(H3,1,2,3,4)
InChi Key
LXKCHCXZBPLTAE-UHFFFAOYSA-N
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    5 g

    $69

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    10 g

    $120

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    25 g

    $263

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    50 g

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    Product Description

    3,4-Dimethylpyrazole (phosphate) (3,4-DMPP) is an inhibitor of nitrification deemed safe by extensive standard toxicology and ecotoxicology tests.1 When utilized on crops, 3,4-DMPP prevents nitrogen loss from soil, increases nitrogen use efficiency, and boosts crop yields.1,2 However, a meta-analysis found no influence of 3,4-DMPP on net crop yield, although it may boost yields in alkaline soil.3 3,4-DMPP may be less effective in acidic soils and in the post-harvest period.4,5 DMPP interferes with ammonia monooxygenase from ammonia-oxidizing bacteria (AOB) and archaea (AOA) but may not directly affect AOB, AOA, and non-target populations.6

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Zerulla, W., Barth, T., Dressel, J., et al. 3,4-Dimethylpyrazole phosphate (DMPP) – a new nitrification inhibitor for agriculture and horticulture. Biol. Fertil. Soils 34(2), 79-84 (2001).

    2. Liu, C., Wang, K., and Zheng, X. Effects of nitrification inhibitors (DCD and DMPP) on nitrous oxide emission, crop yield and nitrogen uptake in a wheat–maize cropping system. Biogeosci. 10(4), 2427-2437 (2013).

    3. Yang, M., Fang, Y., and Shi, Y. Efficiency of two nitrification inhibitors (dicyandiamide and 3, 4-dimethypyrazole phosphate) on soil nitrogen transformations and plant productivity: A meta-analysis. Sci. Rep. 6, 22075 (2016).

    4. Shi, X., Hu, H.-W., Müller, C., et al. Effects of the nitrification inhibitor 3,4-dimethylpyrazole phosphate on nitrification and nitrifiers in two contrasting agricultural soils. Appl. Environ. Microbiol. 82(17), 5236-5248 (2016).

    5. Scheer, C., Rowlings, D., Firrell, M., et al. Nitrification inhibitors can increase post-harvest nitrous oxide emissions in an intensive vegetable production system. Sci. Rep. 7, 43677 (2017).

    6. Kong, X., Duan, Y., Schramm, A., et al. 3,4-Dimethylpyrazole phosphate (DMPP) reduces activity of ammonia oxidizers without adverse effects on non-target soil microorganisms and functions. App. Soil Ecol. 105, 67-75 (2016).