Cacodylic acid |
![]() Last updated: 04/01/2021 |
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(Also known as: dimethylarsenic acid; arsecodile; DMAA; Agent blue; hydroxydimethylarsine oxide) |
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A highly toxic obsolete arsenical herbicide that was used as a cotton defoliant and for weed control in non-cropping situations. | |
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Defoliant; Total vegetation control | |
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Cotton; Non-cropped areas; Utility qpplications | |
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Obsolete | |
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UK regulatory status |
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Not approved | ||
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Not applicable | ||
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No UK approval for use |
EC Regulation 1107/2009 (repealing 91/414) |
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Also used in |
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Chemical structure |
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C₂H₇AsO₂ | |
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C[As](=O)(C)O | |
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No data | |
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OGGXGZAMXPVRFZ-UHFFFAOYSA-N | |
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InChI=1S/C2H7AsO2/c1-3(2,4)5/h1-2H3,(H,4,5) | |
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Yes |
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Common Name | Relationship | Link |
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cacodylic acid | - | ![]() |
General status |
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Herbicide, Defoliant | |
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Organometal | |
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Synthetic | |
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Non-selective, contact action | |
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75-60-5 | |
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200-883-4 | |
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012501 | |
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2513 | |
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138.00 | |
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dimethylarsinic acid | |
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dimethylarsinic acid | |
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As,As-dimethylarsinic acid | |
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Heavy metal; PAN Bad Actor Chemical; Potential groundwater contaminant | |
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None allocated | |
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None allocated | |
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Not applicable | |
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Not applicable | |
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White crystalline powder |
Formulations |
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Usually formulated as a liquid concentrate |
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667000 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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192 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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200 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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Not expected to self ignite; Not highly flammable. | - | - | ||||||||
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1.1 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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1.57 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
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Degradation |
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Soil adsorption and mobility |
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Fate indices |
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644 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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> 5620 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Colinus virginianus4 = Verified data |
Low | ||||||||
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> 100 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Lepomis macrochirus4 = Verified data |
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> 10.0 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Pseudokirchneriella subcapitata4 = Verified data |
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General |
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High (class III) | - | - | ||||||||
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644 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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2000 | 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 |
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4.9 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Rat 4 hr4 = Verified data |
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Intraperitoneal LD₅₀ = 500 mg kg⁻¹ | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Mouse3 = Unverified data of known source |
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High risk - PPE/PPC essential | ||||||||||
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Health issues |
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Highly toxic by ingestion, inhalation, or skin contact Heart, CNS, bladder, thyroid, kidney and liver toxicant USEPA - probable human carcinogen |
Handling issues |
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Will emit toxic fumes if heated Mildly corrosive Hygroscopic Not compatible with strong oxidising or reducing agents IMDG Transport Code 6.1 |
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T+ - Highly toxic: R26/27/28, R40 | |||
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1572 | |||
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Packaging Group II (medium danger) |
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cacodylic acid | ||
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acide cacodylique | ||
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Record last updated: | 04/01/2021 |
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 |