Disodium methanearsonate |
![]() Last updated: 18/01/2021 |
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(Also known as: disodium methyl arsonate; DSMA) |
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An arsenical herbicide used for post-emergence weed control mainly on turf | |
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Crabgrass; Stiltgrass; Barnyardgrass; Goosegrass | |
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Turfgrass; Ornamental turf; Turf grown for sod; Golf courses and sports turf; Cotton; Roads and rights-of-way | |
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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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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Chemical structure |
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CH₃AsNa₂O₃ | |
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C[As](=O)([O-])[O-].[Na+].[Na+] | |
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No data | |
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SDIXRDNYIMOKSG-UHFFFAOYSA-L | |
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InChI=1S/CH5AsO3.2Na/c1-2(3,4)5;;/h1H3,(H2,3,4,5);;/q;2*+1/p-2 | |
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Yes |
General status |
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Herbicide | |
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Arsenical compound | |
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Synthetic | |
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Interferes with ATP production and cell division | |
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144-21-8 | |
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205-620-7 | |
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013802 | |
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8947 | |
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183.93 | |
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disodium methyl-dioxido-oxoarsorane | |
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Possible groundwater contaminat; PAN bad actor chemical | |
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Not known | |
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Not known | |
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Not applicable | |
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Not applicable | |
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Formulations |
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43200 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
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135 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
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165 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
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5.01 X 10-06 | Calculated | - | |||||||
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-5.3 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) 3 = Unverified data of known source |
Low | ||||||||
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4.1 | 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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269 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
Persistent | |||||||
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Best available data | ||||||||||
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Soil adsorption and mobility |
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Slightly mobile | |||||||
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1680 | ||||||||||
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Fate indices |
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1.88 | Calculated | Transition state | ||||||||||||||||||||||||||
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7.11 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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High | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - |
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Low risk | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Based on LogP < 34 = Verified data |
Low risk | |||||||
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821 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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4695 | 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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> 114 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Oncorhynchus mykiss4 = Verified data |
Low | ||||||||
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153.0 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Daphnia magna4 = Verified data |
Low | ||||||||
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72.7 | P3 P = Other governments and regulators Lemna gibba 14 day3 = Unverified data of known source |
Low | ||||||||
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366 | 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 |
Low | ||||||||
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> 20.7 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) 4 = Verified data |
Moderate | |||||||
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General |
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High (class III) | - | - | ||||||||
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821 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
Moderate | ||||||||
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10000 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Mouse3 = Unverified data of known source |
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22.1 | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Rat3 = Unverified data of known source |
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Intraperitoneal LD₅₀ > 1000 mg kg⁻¹ | V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM ) Mouse3 = Unverified data of known source |
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Health issues |
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Highly toxic Liver, kidney, renal and cardiovascular system toxicant May cause anemia, leucopenia and thrombocytopenia May damage muscular coordination |
Handling issues |
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No information available | |||
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T - Toxic: R23/25 N - Dangerous for the environment: R50/53 |
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S20/21, S28, S45, S60, S61 | |||
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NL (Not listed) | |||
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disodium methanearsonate | ||
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Record last updated: | 18/01/2021 |
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 |