The following list identifies a number of reasons why soy wax candles are preferable to paraffin wax candles: No carcinogens are produced from burning soy wax. Soy wax is non-toxic.   Soy wax will not discolor your walls or furniture with petroleum byproducts. Soy wax is a renewable resource; petroleum is limited. Burning soy wax candles helps support the American farmer. Soy wax holds color and scent better than paraffin.                      Soy wax burns 30% to 50% longer than paraffin.