TRAFFIC on the Kwinana Freeway has been brought to a standstill as emergency services work to clean up a chemical spill.

The Department of Fire and Emergency Services reported sulphuric acid was believed to have leaked from a vehicle travelling south on the freeway between Mill Point Road and South Terrace.

The freeway exit at South Terrace has been closed.

Anyone who has driven through the area was advised to should hose down their vehicle.

Motorcyclists should also immediately hose down their clothing.

The incident was reported at 4pm.