MO’s Working Group on the Evaluation of Safety and Pollution Hazards of Chemicals (ESPH 19), meeting at IMO Headquarters from October 21-25, has agreed to classify high-viscosity PIB (Polyisobutylene) as category X for carriage by ship, thereby prohibiting the discharge of cargo residues into the sea. The categorization and carriage requirements for high-viscosity PIB will be included in the annual MEPC.2/Circular on the Provisional categorization of liquid substances, usually issued by IMO on 17 December each year and will be proposed for inclusion in the next edition of the International Code for the Construction and Equipment of…