limonene Search Term: limoneneSource Category: ASSISTLimonene is on the Recommended Chemicals list for Australian schools. Synonyms: DL-limonene, (±)-limonene, dipentene, citrus skin extract , citrus terpene; CAS Number: 138-86-3; Signal Word: Warning. Tags: 138-86-3DL-limonene(±)-limonenedipentenecitrus skin extractcitrus terpene