A trace amount of titanium tetrachloride was released at DuPont's DeLisle plant Monday morning.
Plant officials sounded the alarm, and Harrison County Sheriff's Deputies closed a portion of Kiln-DeLisle Road, which runs in front of the plant. By 10:15 am, the road was reopened to traffic.
Tickle, as the chemical is commonly called, can cause a burning sensation if breathed in.
The incident happened about 9:30 Monday morning, and the all-clear was given about 45 minutes later. Plant Manager Mark Holman says no injuries were reported, and no evacuations were ordered.