The main use of Thiomersal offered by Euclid is as an antiseptic and antifungal agent for its oligodynamic effect. This organomercury compound is also sold under the trade name Merthiolate given by a reputed pharma company. It finds use in several formulations in the pharma industry as a preservative. It is also added in tattoo inks. Majority of the eyedrops and contact lens disinfecting solutions also has Thiomersal working as a preservative. It has mild toxicity.