In the Höchst industrial park in Frankfurt, white powder leaked out on Wednesday night.
It is non-toxic polyethylene powder that is used for the production of plastic parts, as the fire department announced on Wednesday morning.
The wind distributed the powder partly beyond the plant boundary into the adjacent city area.
There is no danger to the population. How much powder escaped was initially not known. According to the fire brigade, the exit could be stopped. The industrial park announced that fruits and vegetables from the affected area should be washed before consumption.