Emergency crews responded to what they are calling a minor chemical explosion in a lab at 435 Winchester Avenue in New Haven at 10:17 a.m.
Less than an ounce of 3 hexane was found, officials said.
The explosion was confined to a hood. The employee was not injured and did not require medical treatment.
The state Department of Energy and Environmental Protection will be notified to follow up with P2 Science, the company involved.
P2 Science is a bio-refining company, according to its Web site. http://www.p2science.com/