Are blends or adulterated oils suitable for aromatherapy?

Aromatherapy relies on the naturally occurring elements in essential oils.

Most blended oils and adulterated oils, unless otherwise specified on the label, are not entirely made with essential oils. Many of them have some portion that is made up of chemicals that mimic the scent of the herb (etc.) that they claim is in it.

The chemically produced scents do not have the phenols, terenes, esters, ketones, and other properties that essential oils have, rendering them ineffective for aromatherapy.