Arsenicals 
Monosodium Methanearsonic Acid (MSMA) 
Soil microorganisms degraded MSMA to CO 
9 and arsenate. No other 
products were observed (1455). 
After treatment of Johnsongrass (Sorghum halepense) with cl4- 
methanearsonic acid, two metabolites were observed. One appeared as an 
unidentified form of arsenic; the other was an unidentified complex (1279). 
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