The substance is assigned to packing group II under UN No. 3342 but may also be assigned to packing group III in accordance with 2;4.3.3 of this regulations after the appropriate tests have been carried out or may not be subject to the provisions of Division 4.2 at all in accordance with Special condition A3. In the latter case, the substance may have to be classified as environmentally hazardous according to the criteria of Class 9.