How are Scented Candles Made?
Though they seem safe, regular scented candles are a huge source of indoor air pollution and they put off chemicals that are considered just as dangerous as second-hand smoke. Paraffin is a petroleum waste product and has to be deodorized and chemically bleached before it can be made in to wax. (source)
Most candles are made of paraffin wax, which creates highly toxic benzene and toluene when burned (both are known carcinogens). In fact, the toxins released from paraffin candles are the same as those found in diesel fuel fumes.
On top of that, many scented candles also have wicks that contain heavy metals like lead, and even a few hours of burning them can create levels of airborne heavy metals that are much higher than the acceptable limits. In the US, candle wicks are supposed to be made of cotton or paper, but studies have found that as much as 30% of candles contain heavy metals in the wicks.
“A candle with a lead-core wick releases five times the amount of lead considered hazardous for children and exceeds EPA pollution standards for outdoor air, says the CPSC, which is why they banned lead wicks in 2003. Exposure to high amounts of lead has been linked to hormone disruption, behavioral problems, learning disabilities, and numerous health problems.” (source)
“Other toxic chemicals that may be present in the paraffin mixture and released through burning include: Acetone, Trichlorofluoromethane, Carbon Disulfide, 2-Butanone, Trichloroethane, Trichloroethene, Carbon Tetrachloride, Tetrachloroethene, Chlorobenzene, Ethylbenzene, Styrene, Xylene, Phenol, Cresol, Cyclopentene. Some of the toxins are found in other products such as paint, laquer and varnish removers– that’s potent and powerful stuff!”
Additionally:
“Petro-soot from paraffin candles gives off the same soot as the exhaust of a diesel engine, and is considered just as dangerous as second hand smoke, causing problems from headaches to lung cancer. Paraffin fumes have been found to cause tumors in the kidneys and liver of lab animals.” (source)
When I first realized all the problems with scented (and unscented paraffin based candles) candles, I was really disappointed. Thankfully, there are some great alternatives. If you would like some in depth information on what to look for when shopping for candles read this article which explains which wax, wicks, and fragrances are the safest and most non toxic choices.