... camphor oil is used and has a clear and fresh smell. The brown and yellow camphor is toxic and carcinogenic since ... branches and is then rectified under vacuum and filter pressed.The main chemical components are a-pinene, camphene, b-pinene, ... caryophyllene, borneol, piperitone, geraniol, safrole, cinnamaldehyde, methyl cinnamate and eugenol.The brown and yellow camphor oil has a very high safrole ...