Patchoulol (patchouli alcohol) is the "coeur" element of patchouli oil. After trials and tests of products from all the major suppliers, the Ventos patchoulol comes out miles ahead. It has absolutely no off notes. Small amounts can sweeten patchouli oil, while large overdoses can add a wonderfully novel new woody earthy character to a fragrance.  This product is 100% natural according to ISO 9235 standards and can be used in all natural perfumes.