Risk managers may have difficulty complying with new security regulations designed to prevent terrorist access to more than 300 chemicals, according to a panel held yesterday by a brokerage concern.

The group's viewpoint was voiced during a seminar on “Chemical Industry Security Risks” presented by Marsh, the insurance brokerage subsidiary of Marsh & McLennan Companies.

Fabrice Lebourgeois, leader of Marsh's chemicals practice, said that after Sept. 11, 2001 and other terrorism incidents in the United States, concerns over attacks employing chemical ingredients were raised and remain a high-security risk in this country.