Methylmercury

Methylmercury (MeHg) is an organomercury compound and a well-known neurotoxin. It is a bioaccumulative environmental toxicant.

Introduction

Methylmercury is a highly toxic form of mercury. It is a potent neurotoxin that builds up in fish and shellfish. Humans are exposed to methylmercury almost entirely by eating contaminated fish and wildlife that are at the top of aquatic foodchains.

Chemistry

Methylmercury is a derivative of mercury (II) cation. It consists of a mercury atom bonded to a methyl group, with the chemical formula CH3Hg+. Methylmercury is a strong electrophile, and it reacts with many substances, including thiols.

Toxicity

Methylmercury is a dangerous compound that is harmful to many organisms. It is a potent neurotoxin, and exposure can lead to serious health effects. The nervous system is very sensitive to all forms of mercury. Methylmercury and other compounds are even more dangerous because they are more likely to reach the brain.

Exposure and effects

Exposure to methylmercury can occur through the consumption of fish and shellfish contaminated with methylmercury. The effects of methylmercury exposure can vary depending on several factors, including the dose, the duration of exposure, the route of exposure, and the age of the person exposed.

Prevention and treatment

Prevention of methylmercury toxicity involves avoiding or limiting consumption of fish and shellfish that are known to contain high levels of methylmercury. Treatment for methylmercury poisoning is limited and often involves supportive care and management of symptoms.

See also

• Mercury poisoning
• Minamata disease
• Environmental toxicology