Police had identified four bodies earlier. Another body was today identified as the factory's Executive Director, Sanjoy Das, they said.
Das's wife was shown the body yesterday but she could not identify it.
"She identified the body through a ring that her husband used to wear. She brought photographs and the ring in the finger of Das in photo and ring on the charred body were similar," Superintendent of Police (City) Dinesh Yadav said.
Meanwhile, an National Disaster Relief Force team today searched the premises.
"Our search will continue tomorrow too," said Rakesh Raka of the NDRF team.