Horng Lairapo, the medical and legal manager for the Cambodian Acid Survivors Charity, said Sim Yi, 42, died of his injuries at 6 p.m. Friday at Preah Kosamak Hospital in Phnom Penh after being transferred there from a provincial hospital, The Phnom Penh Post reported.
About half of Sim's body had been burned in the attack in Kampong Cham province's Pumron village, Horng said.
Srei Leak, 19, identified as Sim's girlfriend, suffered burns to about 20 percent of her body and underwent the first of a series of skin grafts Friday at the Children's Surgical Center in Phnom Penh, Horng said. He said she may not recover normal sight in her right eye.
Sim's wife, Chheng Mao, 50, allegedly doused him and Srei with acid Friday morning after her husband took the younger woman back to the couple's house, Memot district police officer Him Sarak said. He said Chheng fled after the attack and had not been arrested.
Sim became the first person to die of an acid attack since passage of a Cambodia law in November that makes acid attacks punishable by up to life in prison.