Dalapon |
![]() Last updated: 07/01/2021 |
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(Also known as: 2,2-DPA) |
SUMMARY |
Dalapon is an organochlorine herbicide and plant growth regulator that is not approved for use in the EU. It is highly soluble in water and relatively volatile. Data suggests it is moderately persistent in soil systems. Dalapon is relatively non-toxic to mammals but does appear to have a high potential for bioaccumulation. It has a low toxicity to birds and fish but is moderately toxic to honeybees. |
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A herbicide used to control annual and perennial grasses including couch. Usually used as the sodium salt. | |
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Bluegrass; Crabgrass; Quackgrass; Bermudagrass Johnsssongrass; Cattails; Rushes; Barnyardgrass; Couch | |
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Cotton; Fruit including currants, plums, apricots, cherries, citrus; Potatoes; Sugarcane; Carrots; Alfalfa; Asparagus; Flax; Lucerne; Non-crop situations including domestic houses, commerical and industrial sites | |
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Current | |
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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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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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 |
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Chemical structure |
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C₃H₄Cl₂O₂ | |
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CC(C(=O)O)(Cl)Cl | |
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No data | |
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NDUPDOJHUQKPAG-UHFFFAOYSA-N | |
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InChI=1S/C3H4Cl2O2/c1-3(4,5)2(6)7/h1H3,(H,6,7)/f/h6H | |
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Yes |
General status |
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Herbicide, Plant growth regulator | |
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Organochlorine | |
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Synthetic | |
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Selective, systemic absorbed through leaves and roots. Inhibition of lipid synthesis. | |
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75-99-0 | |
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200-923-0 | |
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52 | |
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028901 | |
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6418 | |
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143.0 | |
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2,2-dichloropropanoic acid | |
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2,2-dichloropropionic acid | |
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2,2-dichloropropanoic acid | |
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Z | |
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0 | |
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Not applicable | |
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Not applicable | |
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Colourless liquid |
Formulations |
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502000 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
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185 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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6.03 X 1000 | Calculated | - | |||||||
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0.78 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low | ||||||||
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1.74 | 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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0.01 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Low volatility | ||||||||
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Degradation |
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35 | G3 G = Extension Toxicology network database EXTOXNET (click here ) 3 = Unverified data of known source |
Moderately persistent | |||||||
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General literature states DT₅₀ 2-8 weeks | ||||||||||
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36.9 | R3 R = Peer reviewed scientific publications 3 = Unverified data of known source |
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Birdsfood trefoil foliage, n=1 | ||||||||||
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Soil adsorption and mobility |
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Fate indices |
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Cannot be calculated | - | - | |||||||||||||||||||||||||
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Low risk | Q3 Q = Miscellaneous internet resources Based on LogP < 33 = Unverified data of known source |
Low risk | |||||||
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9330 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Rat4 = Verified data |
Low | ||||||||
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> 5000 | G3 G = Extension Toxicology network database EXTOXNET (click here ) Anas platyrhynchos3 = Unverified data of known source |
Low | ||||||||
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> 105 | G3 G = Extension Toxicology network database EXTOXNET (click here ) Lepomis macrochirus3 = Unverified data of known source |
Low | ||||||||
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11.44 | P4 P = Other governments and regulators Chlamydomonas moewusii 3 day4 = Verified data |
Low | ||||||||
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> 50 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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9330 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Rat4 = Verified data |
Low | ||||||||
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5000 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
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List I | - | - | ||||||||
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Health issues |
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May cause conjunctivitis or corneal damage |
Handling issues |
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Corrosive IMDG Transport Code is normally 6.1 |
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Health: H315, H318 Environment: H412 |
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Xn - Harmful: R22, R41 Xi - Irritant: R38 N - Dangerous for the environment: R52, R53 |
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S2, S26, S39, S61 | |||
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U (Unlikely to present an acute hazard) | |||
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2996 | |||
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dalapon | ||
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dalapon | ||
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Dalapon | ||
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dalapon | ||
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dalapon | ||
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dalapon | ||
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dalapon | ||
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dalapon | ||
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dalapon | ||
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dalapon | ||
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dalapon |
Record last updated: | 07/01/2021 |
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 |