Chlorine rail car crash renews rail and homeland security concerns.(United States/Americas)

The recent Norfolk Southern rail car crash near Graniteville, SC has given added emphasis to concerns about security and rail transportation service, two of the chemical industry's top priorities. The January 14 accident at Aiken, SC, which killed nine and caused the evacuation of more than 5,000 people, is the deadliest train wreck involving hazardous materials in more than 20 years. Preliminary federal inquiries show the accident may have been caused by an improper switch change by a rail employee.

Olin, which leased the rail car and produced the chlorine involved in the wreck, says it is premature to comment on the crash until the National Transportation Safety …