Two specific multi-product allocation scenarios were investigated. Firstly, the purified αpinene stream was considered equally valuable to the β-pinene product, and accordingly, the impacts of CST separation were allocated by mass to both streams (allocation scenario 2). For this scenario, LCIA results show that the environmental impacts of β-pinene production are comparable to those of benzene, which is reflected in columns 1 and 3 of Figure . Secondly, the α-pinene, β-pinene and mixed terpene streams were considered as three equally valuable products, and thus the impacts of CST separation were allocated by mass to all three terpene streams (allocation scenario 3). Here, LCIA results show that the environmental impacts of βpinene production are significantly lower than those of benzene, as reflected in columns 1 and 4 of Figure . A detailed description of the employed allocation strategies is given in SI Section S8.1. Thus, the presented LCIA results confirm that β-pinene obtained from the investigated technologies for CST production and separation incurs fewer environmental impacts than benzene production if economically equivalent valorisation opportunities can be established for all three terpene product streams.