An Iraqi appeals court on Tuesday upheld a death sentence against one of Saddam Hussein’s main henchmen, known as Chemical Ali, for a genocidal campaign that killed as many as 180,000 Kurds in the 1980s.

The head of the nine-member Iraqi High Tribunal, Arif Abd al-Razaq, said the decision paved the way for the henchman, Ali Hassan al-Majid, a cousin of Mr. Hussein, to be executed within 30 days in accordance with Iraqi law.