2-Propene-1-thiol, commonly referred to as allyl mercaptan, is an organosulfur compound characterized by its distinct, pungent odor reminiscent of garlic and onions. Identified by CAS number 870-23-5, this clear to pale yellow liquid is a highly reactive thiol featuring a terminal alkene group. Its dual functionality makes it a versatile building block in organic chemistry, enabling a wide range of transformations involving both the sulfur atom and the carbon-carbon double bond.
In industrial and research settings, 2-propene-1-thiol is valued for its role as a synthetic intermediate. Due to its high volatility and low odor threshold, it requires specialized handling and storage conditions, typically involving inert atmospheres and light-protected containers to prevent oxidation or polymerization. Its chemical profile allows it to participate in various addition and substitution reactions, making it essential for producing complex sulfur-containing molecules.