I think it's sad how modern natural perfume books (teaching material) have so little information with regard to raw materials' safety. Redirecting the reader/student elsewhere, away from the book or teaching manual, isn't a responsible route to take as the book should be comprehensive enough to use without outside backup.
If you're a student of natural&botanical perfumery it is wise to acquaint yourself with those raw materials which should be used with caution, or, in some cases, not at all.
I don't have a current comprehensive list (that I can share) of raw materials which cause phototoxicity, sensitivities, are carcinogenic or toxic irritants. The folks at IFRA can't decide what underwear they want to wear today let alone what's on or off the restricted/use with caution list, it's hard keeping up with their shenanigans . . . take them with a cup of salt, but do become informed in this neglected area of natural&botanical perfumery education.