Lemon oils are amongst the highest volume and most frequently traded of the flavor and fragrance essential oils. Citronellal and citral are considered the key components responsible for the lemon note with citral (neral + geranial) preferred. Of the myriad of sources of citral. the Australian myrtaceous tree. https://www.spidertattooz.com/Estes-C6-5-ENGINE-BULK-PACK/