It’s actually an implicit two-place predicate. Part of what’s meant by “chemical” is that it’s suspicious, and whether something’s suspicious or not depends on what you know about it. How things are labelled on food packages is related to their safety in such a way that treating “P-Menthane-3,8-diol” as more suspicious than “lemon eucalyptus extract” is actually correct.
It’s actually an implicit two-place predicate. Part of what’s meant by “chemical” is that it’s suspicious, and whether something’s suspicious or not depends on what you know about it. How things are labelled on food packages is related to their safety in such a way that treating “P-Menthane-3,8-diol” as more suspicious than “lemon eucalyptus extract” is actually correct.