Potassium phosphonates (Ref: LBG 01F34) |
![]() Last updated: 02/03/2021 |
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(Also known as: phosphite; phosphonate; KPP; potassium phosphite) |
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A mixture of two (mono- and di-) inorganic potassium salts that has fungicidal properties and is used to control Pythium and Phytophthora on a variety of fruit and ornamental crops | |
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Pythium spp.; Phytophthora spp. including root rot | |
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Fruit including avocados, apples; Ornamentals; Trees | |
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Current | |
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1997, USA |
UK regulatory status |
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Approved | ||
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30/09/2026 | ||
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No UK approval for use |
EC Regulation 1107/2009 (repealing 91/414) |
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Approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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France | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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30/09/2023 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia |
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Chemical structure |
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None | |
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KH₂PO₃ & K₂HPO₃ | |
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OP(O)O.[K+] | |
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No data | |
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UUCFTYONLUTOFU-UHFFFAOYSA-N | |
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InChI=1S/K.H3O3P/c;1-4(2)3/h;1-3H/q+1; | |
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Yes |
General status |
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Fungicide | |
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Inorganic compound | |
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<31.6 phosphonate ions, <20% potassium | |
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EU dossier - none declared | |
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Synthetic | |
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Mixed mode of application including direct toxicity to plant pathogens reducing populations and promotion of plants natural defences | |
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13977-65-6 | |
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12492-26-7 | |
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076416 | |
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No data | |
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139 (mean) | |
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Reaction mixture of Potassium hydrogen phosphonate and dipotassium phosphonate | |
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Reaction mixture of Potassium hydrogen phosphonate and dipotassium phosphonate | |
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Not applicable | |
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Not applicable | |
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Not applicable | |
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None | |
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Deliquescent solids supplied in aqueous solution |
Formulations |
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Usually supplied as an aqueous solution with a variety of application methods used including foliar sprays, soil drenches and root dips |
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500000 | A3 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 3 = Unverified data of known source |
High | ||||||||
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73 | A4 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 4 = Verified data |
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Decomposes before boiling | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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180 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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Not expected to self ignite; Not highly flammable | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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Not applicable | - | - | |||||||
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Not applicable | A3 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 3 = Unverified data of known source |
Not applicable | ||||||||
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1.65 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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2.0 | A4 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 4 = Verified data |
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PKa(2) = 6.59 | |||||||||||
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Degradation |
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142 | A3 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 3 = Unverified data of known source |
Persistent | |||||||
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142 | A3 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 3 = Unverified data of known source |
Persistent | ||||||||
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381 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
Very persistent | ||||||||
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EU dossier lab studies DT₅₀ range 88-196 days, DT₉₀ range 319-442 days | ||||||||||
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Soil adsorption and mobility |
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10.7 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
Moderately mobile | |||||||
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453.6 | ||||||||||
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EU dossier Kd range 3.1-18.96 mL g⁻¹, Koc range 228-972 mL g⁻¹, soils=5 | ||||||||||
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Fate indices |
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2.89 | Calculated | High leachability | ||||||||||||||||||||||||||
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2.85 X 10-01 | Calculated | - | |||||||||||||||||||||||||
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Medium | Calculated | - | ||||||||||||||||||||||||||
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Moderately mobile | Calculated | - |
Other known metabolites |
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Phosphoric acid | - | - | - | - |
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20 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Low risk5 = Verified data used for regulatory purposes |
Low potential | |||||||
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> 5000 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Rat5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 1997 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Unknown species Reproductive NOAEL5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 2250 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Colinus virginianus as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 5620 mg kg feed⁻¹ | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Colinus virginianus as phosphonic acid5 = Verified data used for regulatory purposes |
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149.04 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Colinus virginianus NOEC5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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> 118 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Oncorhynchus mykiss as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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100 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Oncorhynchus mykiss as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 118 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Daphnia magna as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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100 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Chironmus riparius as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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146.7 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Scenedesmus subspicatus as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 145 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) as potassium phosphonates5 = Verified data used for regulatory purposes |
Low | ||||||||
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> 1000 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Eisenia foetida as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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182.5 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Eisenia foetida as phosphonic acid5 = Verified data used for regulatory purposes |
Low | ||||||||
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12.82 | Mortality [Dose: 2.02 kg ha⁻¹], as phosphonic acid A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Alphidius rhopalosiphi5 = Verified data used for regulatory purposes |
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10.8 | Mortality [Dose: 2.02 kg ha⁻¹], as phosphonic acid A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Typhlodromus pyri5 = Verified data used for regulatory purposes |
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Nitrogen mineralisation: Minor transient effects Carbon mineralisation: Minor transient effects |
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes Dose: up to 26.99 mg posphonic acid/kg soil 28 days |
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General |
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High (class III) | - | - | ||||||||
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> 5000 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Rat5 = Verified data used for regulatory purposes |
Low | ||||||||
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4000 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Rat5 = Verified data used for regulatory purposes |
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> 5.05 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) Rat5 = Verified data used for regulatory purposes |
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2,25 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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None allocated | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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5.0 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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100 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) default5 = Verified data used for regulatory purposes |
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Negligible risks identified for proposed uses | |||||||||
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Negligible risks identified for proposed uses | ||||||||||
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10.5 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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Health issues |
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No further information available |
Handling issues |
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Not oxisiding or explosive | |||
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Health: H315, H319 | |||
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Xi -Irritant: R36 | |||
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NL (Not listed) | |||
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potassium phosphonates | ||
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Record last updated: | 02/03/2021 |
Contact: | aeru@herts.ac.uk |
Please cite as: | Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |