Thimerosal

**Definition:** An ethylmercury-sulfidobenzoate that has been used as a preservative in VACCINES; ANTIVENINS; and OINTMENTS. It was formerly used as a topical antiseptic. It degrades to ethylmercury and thiosalicylate.

**Tree numbers:** - D02.691.750.100.347.850

**Synonyms:** - Mercurothiolate - Thiomersal - Thiomersalate - Sodium Ethylmercurithiosalicylate