... and yellow camphor is toxic and carcinogenic since it contains safrole and is not used in aromatherapy.The camphor tree ... linalool, bornyl acetate, terpinen-4-ol, caryophyllene, borneol, piperitone, geraniol, safrole, cinnamaldehyde, methyl cinnamate and eugenol.The brown and yellow camphor ... oil has a very high safrole content, with yellow having between 10 - 20 % and the ...