In Appendix VI of Regulation (EC) No 1272/2008 (CLP Regulation), the substance is classified as not environmentally hazardous. However, because the substance 2,4,4-trimethylpent-1-ene present in the mixture of isomers is environmentally hazardous, and BAM does not have exact concentrations for this mixture, it is up to the user to decide whether the substance could be environmentally hazardous after all.