Eight people have been treated by paramedics following a "chemical incident" at Melbourne airport on Wednesday morning.

Ambulance Victoria Regional Health Commander Jon Byrne said paramedics were called to the airport about 9.30am.

"Two ambulances, an ambulance bus, an ambulance vehicle with extra protective equipment and a health commander were sent to the airport," he said.

"We have assessed eight people who were nearby."

The chemical spill occurred in a cargo area of the airport and no Melbourne airport staff were involved in the incident, according to an airport spokesman.

It is believed the chemical was hydrofluoric acid.

One person has been taken to The Royal Melbourne Hospital in a stable condition.

Seven others were taken to The Northern Hospital, also in a stable condition.

The airport has tweeted that flights are not being affected by the incident.