“It appears to be some sort of reaction,” Dalton said.
“The chemical has been isolated and the site has been returned back to Victoria University.”
Public health staff also attended the incident.
A university spokesman said a science lab remained temporarily closed following a “minor incident” this afternoon.
“The rest of the campus is open. The incident triggered a fire alarm and people who were in the lab at the time left the building. There are no reports of injury. The incident is under control. Emergency services remain on site to complete investigations into the cause of the incident.”
Wellington City Council said a nearby intersection was closed while emergency services responded to the incident.
“A chemical spill at Vic Uni has meant police have closed intersection of Kelburn Parade, Fairlie [Terrace] and Glasgow so alternative routes recommended in meantime.”
The road has now been reopened.