CHOLINESTERASE INHIBITING PESTICIDES

CAS number: See Table 1 

Synonyms: There are many organophosphates and carbamates and many thousands of formulations and trade names. See Table 1 for common names and CAS numbers for Cholinesterase inhibitors with Threshold Limit Values (TLVs^®). 

Chemical formulae: 

Organophosphate Insecticides: There are six classes of organophosphate insecticides based on the differing alkyl phosphate structures shown below (Maroni, 1986). In the general formulas, R₁ and R₂ denote alkyl groups, which can be aliphatic or aromatic. Frequently, R₁ and R₂ are identical. The nature of the X varies widely and can include alkyl, aromatic, halogen, or nitrile groups. 

Carbamates: Carbamates are nitrogen-substituted esters of carbamic acid. Insecticides contain a methyl group in the R₁ position (Maroni, 1988). Herbicides contain an aromatic group at the R₁ position. Fungicides contain a benzoimidazole group in the R₁ position. Fungicide carbamates do not inhibit acetylcholinesterase. 

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