C2H4OS is the chemical formula for a compound known as thioacetaldehyde. It consists of two carbon atoms, four hydrogen atoms, one oxygen atom, and one sulfur atom. Thioacetaldehyde is a colorless liquid with a strong odor and is used in various chemical reactions and industrial applications. This compound is significant in organic chemistry and can be synthesized from other chemicals. It is often studied for its potential uses in the production of pharmaceuticals and agrochemicals, contributing to the development of new materials and compounds in the field of chemistry.