What sort of chemical hazard is thalidomide?

Thalidomide is classified as a teratogenic chemical hazard, meaning it can cause developmental malformations in a fetus if taken during pregnancy. Originally marketed as a sedative and for treating morning sickness, it led to severe birth defects when its risks were not adequately understood. Thalidomide is now used under strict regulations for certain conditions, such as multiple myeloma and leprosy, highlighting the importance of careful monitoring in its use.