A warm and complex scent, Birchwood brings fresh, woodsy notes, paired with hints of musky Tobacco. Why burn soy candles vs. paraffin? Soy wax is non-toxic and burns cleaner than paraffin, resulting in less soot and carcinogens. Soy candles burn slower and cooler than paraffin wax, creating a longer burning candle. Soybeans are a renewable source, unlike paraffin, which consists of petroleum.