District 15 State Police say the fire was reported around 12:15 a.m. Wednesday on Interstate 88 near Route 47.
The westbound lanes were closed for hours, but authorities have now reopened one lane.
Authorities say the truck was carrying phosphate and chlorate.
No injuries were reported.
One lane remained blocked as of noon Wednesday.
Viewers with disabilities can get assistance accessing this station's FCC Public Inspection File by contacting the station with the information listed below. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, 888-835-5322 (TTY), or firstname.lastname@example.org.