The substance tends to polymerize. BAM currently has no information on the temperature of the self-accelerating polymerisation (SAPT) in the various containment types as well as on the heat of reaction.

If the substance, when transported in packagings, intermediate bulk containers (IBCs) or tanks, has a self-accelerating polymerisation temperature (SAPT) not exceeding 75°C and a heat of reaction exceeding 300 J/g, it shall be assigned to

UN No. 3532 POLYMERIZING SUBSTANCE, LIQUID, STABILIZED, N.O.S. 

of Class 4.1. 

For carriage in packagings or intermediate bulk containers (IBC) with a SAPT not exceeding 50°C or in tanks not exceeding 45°C, assignment to

UN No. 3534 POLYMERIZING SUBSTANCE, LIQUID, TEMPERATURE CONTROLLED, N.O.S.

shall be made in Class 4.1.

In the case of a SAPT greater than 75°C or a heat of reaction not exceeding 300 J/g, the substance is not subject to the UN Model Regulations.