Urethane (Standard) is the standard substance of Urethane, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Urethane (Ethyl carbamate; Ethylurethane) is a byproduct formed during the fermentation process of various foods. As an ethyl ester of carbamic acid, it has the ability to inhibit the growth of bacteria, sea urchin eggs, protozoa, and plant tissues, and is commonly used for establishing lung cancer models.