Updated: 4/30/2013 6:10 P.M.
That was the suspicious substance found last week at a campus building, which forced evacuations at Ohio University.
The university said Tuesday the substance was used to seal an envelope which had been mailed to the school from a West Virginia prison.
The substance was tested at a state department of health laboratory in Columbus, after it was found not to be harmful.
The discovery of the envelope forced the evacuation of a bank and campus office, and an employee was taken to a hospital as a precaution.
A scary situation on the campus of Ohio University Thursday.
As one office at the school has been evacuated, because of a letter containing a white, powdery substance.
According to an alert on the school's website, an employee opened the letter, which came by mail.
Campus police quickly evacuated the Legal Affairs and People's Bank sections of the West Union Street Office Center.
And took other steps to isolate the potentially affected area.
it is believed to be an isolated incident and authorities are working to identify the substance.
No other details are being released at this time.