The incident happened around 12:30 a.m. at the Tyger Scientific building located on Stokes Road.
Fire crews were called to the report of light smoke coming from a research lab inside the plant.
Officials then called a hazmat team to the scene from Trenton, New Jersey.
The fire was placed under control and there were no reports of injuries.
The state Department of Environmental protection is on location to assess the damage and potential danger.