UN No. 1109 AMYL FORMATES allows only the selection of packing group III. According to the data of BAM, the flash-point of isoamyl formate can be below 23°C. Therefore, assignment to a collective entry according to packing group II is possible here. For isoamyl formate with a flash-point of not less than 23°C (packing group III), see BAM No. 497.