Firefighters in hazmat suits and the ambulance service were called to a farm in Romsley, between Bridgnorth and Kidderminster, around 1.30pm today following reports of a hazardous substance spillage.
The fire service scrambled two fire engines from Bridgnorth and Telford Central with hazmat officers in attendance.
A spokesperson for the Shropshire Fire and Rescue Service said the incident was caused by a spillage from a small bottle of chemicals in the back of a van.
An ambulance was also called due to a casualty on the scene.
A spokesperson for West Midlands Ambulance Service said: "We were called at 1.25pm to a chemical incident at a farm in Romsley, Bridgnorth.
"An ambulance, paramedic officer and the Trust’s Hazardous Area Response Team were sent to the scene where, on arrival, crews found one male patient with serious injuries. He was treated by ambulance staff at the scene before being taken to hospital for further treatment."
The incident was declared over at 2.50pm after fire crews used a hose reel jet to make the spillage safe.