Based on a RAC report (RAC = Committee for Risk Assessment) of the ECHA, the "worst case scenario" is assumed for the inhalation toxicity, which leads to a classification in Class 6.1 (with subsidiary risk of Class 8), packing group II. If the user has information on inhalation toxicity that does not justify classification in Class 6.1, packing group II, the substance must be assigned to UN No. 2922 CORROSIVE LIQUID, TOXIC, N.O.S., Class 8 (6.1), packing group II.