Diazinon (Ref: OMS 469) |
![]() Last updated: 11/01/2021 |
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(Also known as: dimpylate; ENT 19507) |
SUMMARY |
Diazinon is a general purpose insecticide which no longer has approval for use in the EU. It is moderately soluble and highly volatile. Based on its cheiical properties it has a low risk of leaching to groundwater however, incidents of contamination have been noted and it should be considered a potential groundwater pollutant. It is non-persistent in soil but stable in aqueous environments. It is listed as a severe marine pollutant. Moderately toxic to mammals and earthworms. In humans and other mammals it is a neurotoxicant. Considered highly toxic to most aquatic organisms, honeybees and birds. |
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A broad spectrum insecticide used to control sucking and chewing insects on a wide range of crops including top fruit. Also has livestock applications. | |
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Bean fly; Thrips; Caterpillars; Cabbage white butterfly; Loopers; Cutworms; Livestock pests including mites, ticks, lice and biting flies | |
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Fruit including apples, pears, plums; Rice; Sugarcane; Horticultural crops; Vegetables including beans, brassicas, curcubits; onions | |
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Current | |
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1953, first reported |
UK regulatory status |
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Not approved | ||
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Expired | ||
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No UK approval for use |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Portugal | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia, USA |
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Chemical structure |
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None | |
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C₁₂H₂₁N₂O₃PS | |
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CCOP(=S)(OCC)OC1=NC(=NC(=C1)C)C(C)C | |
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S=P(OCC)(OCC)Oc1nc(nc(c1)C)C(C)C | |
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FHIVAFMUCKRCQO-UHFFFAOYSA-N | |
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InChI=1S/C12H21N2O3PS/c1-6-15-18(19,16-7-2)17-11-8-10(5)13-12(14-11)9(3)4/h8-9H,6-7H2,1-5H3 | |
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Yes |
General status |
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Insecticide, Acaricide, Repellent, Veterinary substance | |
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Organophosphate | |
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950 g kg⁻¹ (without stabilizer) | |
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EU dossier - O,S-TEPP, S,S-TEPP, TEPP24 and diazoxon | |
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Synthetic | |
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Non-systemic with respiratory, contact and stomach action. Acetylcholinesterase (AChE) inhibitor. | |
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333-41-5 | |
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206-373-8 | |
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15 | |
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057801 | |
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3017 | |
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304.35 | |
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O,O-diethyl O-[6-methyl-2-(propan-2-yl)pyrimidin-4-yl] phosphorothioate | |
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O,O-diethyl O-2-isopropyl-6-methylpyrimidin-4-yl phosphorothioate | |
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O,O-diethyl O-(6-methyl-2-(1-methylethyl)-4-pyrimidinyl) phosphorothioate | |
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Potential groundwater contaminant; Severe Marine Pollutant; Chemical subject to PIC regulations | |
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UK statutory standard for surface water quality: ‘Good’ for freshwater, transitional and coastal waters 0.01 µg l⁻¹, 0.02 µg l⁻¹ 95th percentile | |
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Not applicable | |
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Not applicable | |
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1B | |
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Not applicable | |
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Aphis gossypii, Aphis pomi, Delia brassicae, Dialeurodes citri, Psilia rosae, many others | |
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Colourless to dark brown liquid |
Formulations |
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Available in a wide variety of formulations including concentrates for dilution and use as a crop spray, powders and impregnated collars for domestic pet use, shampoos, pour-ons and dips |
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60 | 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 |
Moderate | ||||||||
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250000 | 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 ) Ethyl acetate5 = Verified data used for regulatory purposes |
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9000000 | 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 ) Acetone5 = Verified data used for regulatory purposes |
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9000000 | 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 ) Methanol5 = Verified data used for regulatory purposes |
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9000000 | 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 ) Toluene5 = Verified data used for regulatory purposes |
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Not applicable | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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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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140 | 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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4.90 X 1003 | Calculated | - | |||||||
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3.69 | 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 |
High | ||||||||
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1.11 | 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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2.6 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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Strong acid | |||||||||||
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11.97 | 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 |
Highly volatile | ||||||||
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6.09 X 10-02 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Non-volatile | ||||||||
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Maxima at 246nm = 4050, 290nm = 20.86 | 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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49.5 | 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 ) at 20°C5 = Verified data used for regulatory purposes |
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Degradation |
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9.1 | 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 ) 5 = Verified data used for regulatory purposes |
Non-persistent | |||||||
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9.1 | 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 ) 5 = Verified data used for regulatory purposes |
Non-persistent | ||||||||
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18.4 | 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 |
Non-persistent | ||||||||
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209 | 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 |
Persistent | ||||||||
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61 | 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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EU dossier range lab studies DT₅₀ range 8-23 days, DT₉₀ range 46-372 days; field studies Germany DT₅₀ 7.5-29.3 days, DT₉₀ range 24.9-97 days; Other sources: DT₅₀ 40 days (DW4) | ||||||||||
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2.4 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Published literature RL₅₀ range 0.8-5.2 days, 5 field & undercover grown crops, various matrices, n=6 | ||||||||||
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3.5 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Published literature RL₅₀ range 1.0-9.6 days, 13 field & undercover grown crops, various matrices, n=13 | ||||||||||
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50 | 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 |
Stable | |||||||
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138 | 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 |
Persistent | |||||||
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pH variable: DT₅₀ 12 days at pH 5, 77 days at pH 9 | ||||||||||
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10.4 | 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 |
Fast | ||||||||
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4.3 | 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 fast |
Soil adsorption and mobility |
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27.1 | 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 |
Slightly mobile | |||||||
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609 | ||||||||||
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EU dossier Kd range 3.7-113.5 mL g⁻¹, Koc range 430-841 mL g⁻¹, Soils=2; Other literature studies: Kd range 0.84-19.72 mL g⁻¹; Koc range 254-3779 mL g⁻¹, Soils=25 | ||||||||||
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4.1 | 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 ) 5 = Verified data used for regulatory purposes |
Slightly mobile | |||||||
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643 | ||||||||||
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0.860 | ||||||||||
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EU dossier Kf range1.4-7.6 mL g⁻¹, Kfoc range 413-760 mL g⁻¹, 1/n range 0.820-0.901, Soils=4; Other literature studies: Kf range 0.70-25.73 mL g⁻¹, Kfoc range 259-4175 mL g⁻¹, 1/n range 0.79-1.25, Soils = 25 | ||||||||||
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Fate indices |
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1.51 | Calculated | Low leachability | ||||||||||||||||||||||||||
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3.36 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - |
Key metabolites |
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Soil | 0.820 | Major fraction, Relevant | |||||
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Animal | - | Relevant |
Other known metabolites |
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tetraethyl pyrophosphate (Ref: ENT 18771 ) | TEPP | Not applicable | - | - | |||||
O,O,O,O-tetraethyl-thiopyrophosphate | O,S-TEPP | Not applicable | - | - | |||||
O,O,O,O-tetraethyl-dithiopyrophosphate | S,S-TEPP | Not applicable | - | - | |||||
2-(1-hydroxy-1-methyl)-ethyl-4-methyl-6-hydroxpyrimidine (Ref: GS 31144) | - | Rat (Urinary); Animal; Soil | - | - | |||||
O,O-diethyl O-(2-isopropyl-4-methylpyrimid-6-yl)phosphate Note: CAS = 962-58-3; Toxic |
diazoxon | Animal | - | - | |||||
- | diazinon hydroxylate | Animal | - | - | |||||
2-(1-hydroxymethyl)-ethyl-4-methyl-6-hydroxypyrimidine (Ref: CL-XIX-29) | - | Animal | - | - | |||||
2-isopropyl-4-hydroxymethyl-6-hydroxypyrimidine (Ref: JAK-III-57) | - | Animal | - | - |
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500 | 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 ) (Other literature log BCF range 0.7-3.5 (R3))5 = Verified data used for regulatory purposes |
Threshold for concern | |||||||
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2 | - | |||||||||
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1139 | 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 |
Moderate | ||||||||
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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 ) Rat5 = Verified data used for regulatory purposes |
High | |||||||
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35 | - | |||||||||
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1.44 | 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 ) Anas platyrhynchos5 = Verified data used for regulatory purposes |
High | ||||||||
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8 mg kg bw⁻¹ day⁻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 ) Anas platyrhynchos5 = Verified data used for regulatory purposes |
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3.1 | 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 ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.7 | 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 ) Oncorhynchus mykiss5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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0.001 | 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 magna5 = Verified data used for regulatory purposes |
High | ||||||||
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0.00056 | 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 magna5 = Verified data used for regulatory purposes |
High | ||||||||
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0.0042 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Americamysis bahia3 = Unverified data of known source |
High | ||||||||
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0.023 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Chironomus riparius4 = Verified data |
High | ||||||||
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6.4 | 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 ) Unknown species4 = Verified data |
Moderate | ||||||||
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> 10 | Q1 Q = Miscellaneous internet resources Unknown species1 = Estimated data with little or no verification |
Low | ||||||||
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0.13 | 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 |
High | |||||||
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0.09 | 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 |
High | ||||||||
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0.007 | R4 R = Peer reviewed scientific publications Megachile rotundata4 = Verified data |
High | |||||||
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Contact | ||||||||||
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0.12 | R4 R = Peer reviewed scientific publications Nannotrigona perilampoides4 = Verified data |
High | |||||||
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Contact | ||||||||||
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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 |
Moderate | ||||||||
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811 | 48 hour 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 ) Aphidius rhopalosiphi5 = Verified data used for regulatory purposes |
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0.153 | 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: No significant adverse effect Carbon mineralisation: No significant adverse effect |
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: 80 mg kg⁻¹ soil 28 days |
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0.0024 | 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 ) Fish5 = Verified data used for regulatory purposes |
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General |
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High (class III) | - | - | ||||||||
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1139 | 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 |
Moderate | ||||||||
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2000 | 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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> 5.0 | 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 ) Rat5 = Verified data used for regulatory purposes |
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Intraperitoneal LD₅₀ = 65.0 mg kg⁻¹ | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
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Intratracheal LD₅₀ = 210 mg kg⁻¹ | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
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0.0002 | 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 ) Dog SF=1005 = Verified data used for regulatory purposes |
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0.025 | 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 ) Rat SF=1005 = Verified data used for regulatory purposes |
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0.0002 | A2 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 ) Dog SF=1002 = Unverified data of unknown source |
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1.7-40.0 | 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 ) concentration dependent5 = Verified data used for regulatory purposes |
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List I; List II | - | - | ||||||||
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Possible risk to bystanders by inhalation | |||||||||
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Risk of exposure by dermal and inhalation routes Personal protection clothing and equipment must be worn |
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Health issues |
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IARC Group 2A carcinogen; USEPA - not likely to be a human carcinogen Endocrine issues - Estrogenic effect |
Handling issues |
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Not explosive IMDG Transport Code is usually 6.1 |
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Health: H302 Environment: H400, H410 |
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Xn - Harmful: R22 N - Dangerous for the environment: R50, R53 |
|||
|
S2, S24/25, S60, S61 | |||
|
II (Moderately hazardous) | |||
|
Usually 2783 or 2810 | |||
|
Packaging Group III (minor danger) |
|
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|
|
||
---|---|---|---|
|
diazinon | ||
|
diazinon | ||
|
Diazinon | ||
|
diazinon | ||
|
diazinone | ||
|
diazinon | ||
|
diazinon | ||
|
diazynon | ||
|
diazinon | ||
|
diazinon | ||
|
diazinon |
Record last updated: | 11/01/2021 |
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 |