Alkylmercury compounds having methyl groups. Includes both mono- and dimethylmercury.
methylmercury is not a compound in itself but a cation,
CH3Hg+, which forms one part of methylmercury compounds;
usually methylmercury salts.
Dimethylmercury is one methylmercury
compound that is not a salt. The methylmercury cation is normally associated
with either a simple anion, like chloride (Cl-), or a large
molecule (e.g. a
protein) with negative and positive
charges. The methylmercury cation is the most
toxic form of mercury, able to inhibit fetal
brain development, which results in the behavioural changes and reduced
cognitive and motor ability.