Tyler Brooks
Candles are a popular way to create a cosy atmosphere, but are they harmful to our health and the environment? The short answer is yes, candles are a source of indoor air pollution. When candles burn, they release hydrocarbons, such as toluene and benzene, into the air, which can be irritating to the eyes, nose, throat and skin, and cause headaches, dizziness and even anxiety. In addition, candles release soot, which can stain walls and furniture and enter your home's ventilation system. Certain types of candles, such as paraffin wax candles, are worse than others, as they are derived from petroleum and release carcinogenic chemicals. However, the impact of candles on our health is debated, with some arguing that the small amounts of pollutants released by candles are not enough to cause significant harm to most people.
| Characteristics | Values |
|---|---|
| Candles are pollutants | Yes, candles are a source of indoor air pollution. |
| Types of candles that pollute | Paraffin wax candles are the biggest offenders. Scented candles are worse than unscented candles as they create more soot. |
| Chemicals released | Benzene, toluene, formaldehyde, acetaldehyde, hydrocarbons, carbon dioxide, and soot. |
| Health risks | Candles can irritate the eyes, nose, throat, and skin. They can also cause headaches, dizziness, confusion, and anxiety. Studies suggest a link between candle burning and bladder cancer. |
| Alternatives | Electric space heaters, woodsy-smelling essential oils, reed and steam diffusers, and fragranced wax melts. |
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What You'll Learn
Candles release hydrocarbons, which can cause respiratory issues
Candles are a source of indoor air pollution. Burning candles release hydrocarbons, such as toluene and benzene, into the air. These hydrocarbons are chemical compounds consisting of hydrogen and carbon. While the amount of these compounds released by candles is small, their presence can irritate the eyes, nose, throat, and skin, as well as cause headaches, dizziness, confusion, and anxiety.
Toluene is commonly found in paint thinners and adhesives. Without proper ventilation, exposure to toluene can be harmful. Benzene is a gas emitted by forest fires, volcanoes, and burning coal or oil. It is mostly used in industrial and pharmaceutical settings, but the majority of exposure occurs through smoking.
The release of these hydrocarbons can be especially harmful to individuals with chronic lung conditions, such as chronic obstructive pulmonary disease (COPD). Dr. Farooq suggests that burning candles may be linked to bladder cancer, as the hydrocarbons accumulate in the blood and are excreted through the bladder.
To minimize the impact of candle pollutants, proper ventilation is key. Additionally, soy- or beeswax-based candles are recommended over paraffin wax candles, as they burn cleaner and produce fewer harmful chemicals. Candle warmers and electric space heaters are also suggested as alternatives to traditional candles, providing the same pleasant scent without the soot, smoke, or chemical emissions.
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Paraffin wax candles are the biggest offenders
Candles are a source of indoor air pollution. Burning any candle causes incomplete combustion, which releases water, carbon dioxide, and tiny black particles of carbon soot into the air. This soot can stain walls and furniture and contaminate ventilation systems. It can also irritate the eyes, nose, throat, and skin, causing headaches, dizziness, confusion, and anxiety.
Paraffin wax candles, derived from petroleum, are the biggest offenders when it comes to indoor air pollution. They release carcinogenic chemicals such as benzene, toluene, formaldehyde, and acetaldehyde—the same toxic pollutants found in diesel fuel. These chemicals accumulate in the blood and are eventually excreted through the bladder, which has been linked to bladder cancer. In addition to these harmful chemicals, paraffin wax candles also produce more soot than other types of candles, and scented paraffin candles create even more soot due to the synthetic fragrances they contain.
The alternative to paraffin wax candles is soy- or beeswax-based candles, which burn cleaner and release fewer harmful chemicals. Electric alternatives, such as candle warmers and wax melts, are also recommended as they emit pleasant scents without producing soot, smoke, or chemicals.
While the science is not strong enough to suggest that we should stop using candles entirely, it is important to be mindful of the potential risks associated with indoor air pollution and take steps to mitigate these risks, such as ensuring proper ventilation and choosing candles made from alternative materials.
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Scented candles are worse than unscented candles
It is well-known that candles emit pollutants. Burning a candle releases hydrocarbons, chemical compounds consisting of hydrogen and carbon, into the air. These include toluene, benzene, acetaldehyde, formaldehyde, acrolein, and naphthalene. While the amounts released are small and are not considered a significant health risk for most people, they can be problematic for those with chronic lung conditions or bladder cancer.
Scented candles, in particular, have been found to produce higher emissions of certain pollutants, especially some light hydrocarbon species. A study in the Journal of Hazardous Materials found that toxic compounds like formaldehyde were emitted in large quantities from scented candles, especially when lit. Another study found that scented candles produced nitrogen dioxide (NO2), acrolein, and benzopyrenes above the levels considered safe by groups such as the World Health Organization and the US Environmental Protection Agency. The synthetic fragrances in scented candles also create more soot than unscented varieties, which can stain walls and furniture and contaminate ventilation systems.
Additionally, while not directly related to pollution, it is worth noting that scented candles can trigger allergic reactions and asthma attacks in some individuals.
Therefore, while all candles release pollutants, scented candles are worse than unscented candles in terms of the amount and variety of pollutants emitted. To minimize the impact on indoor air quality, it is recommended to choose candles wisely, burn them responsibly, and ensure proper ventilation.
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Burning candles causes incomplete combustion
Candles are a source of indoor air pollution. They emit hydrocarbons, specifically toluene and benzene, into the air. While the amount of these chemicals released is small, it can be a cause for concern in certain situations. For example, Dr. Farooq suggests that there may be a link between candle burning and bladder cancer due to the accumulation of hydrocarbons in the blood. Additionally, people with chronic lung conditions should be mindful of the levels of air pollution in their homes.
Several factors can contribute to incomplete combustion in candles. One factor is the quality and materials of the candles. Low-quality candles may contain impurities that interfere with the burning process, resulting in unstable burning and the production of black smoke. The length of the wick can also play a role, as a wick that is too long or too short can affect the combustion process.
Environmental conditions, such as poor air circulation or excessive humidity, can also impact the completeness of combustion. Moisture in the air can affect the melting point and characteristics of soy wax, causing the flame to become unstable. Additionally, the stability of the flame can be affected if the first burn of a new candle is insufficient, typically recommended to be at least 1-2 hours. An uneven burn can be corrected by gently moving the wick with tweezers, wick trimmers, or heat-resistant tools to allow it to burn evenly in all directions.
To minimize the impact of incomplete combustion, it is important to choose candles wisely and burn them responsibly. Soy- or beeswax-based candles are known to burn cleaner and release fewer harmful chemicals than paraffin wax candles. Additionally, candle warmers can be used as an alternative to traditional candles, providing the same pleasant scent without the soot, smoke, or chemicals associated with combustion.
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Safer alternatives to scented candles
Candles are a source of indoor air pollution. The combustion of candles releases hydrocarbons, such as toluene and benzene, into the air. While the amount of these chemicals released by candles is small, certain individuals may still be at risk. For example, those with chronic lung conditions or bladder cancer may want to avoid burning candles. Additionally, scented candles are worse than unscented candles as the synthetic fragrances create more soot, which can stain walls and furniture and enter your lungs.
- Reed diffusers: Reed diffusers are a longer-lasting alternative to scented candles. They typically consist of a vessel filled with fragrance oil and thin reeds. The reeds soak up the fragrance and release it into the air through evaporation. A 6-ounce reed diffuser can last up to 4 months, while a 15-ounce reed diffuser can last up to a year.
- Room sprays: Room sprays made from essential oils are a more eco-friendly way to fragrance your home. You can make your own room sprays with ingredients like vodka or witch hazel, or you can purchase non-toxic, essential oil-based room sprays.
- Electric wax warmers: Electric wax warmers slowly melt scented wax melts, releasing fragrance into the air without the need for a lit wick. You can find wax melts made from renewable waxes and natural fragrances like essential oils.
- Potpourri: Making your own blends of potpourri is an easy and effective way to scent your home. You can create different blends depending on your preference, such as a fall mix of dried oranges and spices or a Christmas blend of peppermint leaves and cinnamon sticks.
- Natural fragrances: Bringing natural elements into your home is a great way to add fragrance without any harmful chemicals. You can decorate your home with fragrant dried spices like nutmeg, cloves, and cinnamon, or dried fruits like lime, orange, and lemon. Pine branches and flowers can also add a light and fresh scent to your home.
- Beeswax candles: If you still want to use candles, opt for beeswax candles instead of paraffin wax candles. Beeswax candles burn cleaner and release fewer harmful chemicals.
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Frequently asked questions
Yes, burning candles release hydrocarbons into the air, causing indoor air pollution. However, the amount released is usually not enough to pose a significant health risk.
The small amounts of toluene, benzene, and other hydrocarbons released by candles are only cause for concern in certain situations. For example, people with bladder cancer or chronic lung conditions like COPD may want to avoid burning candles.
Paraffin wax candles, derived from petroleum, release carcinogenic chemicals like benzene, toluene, formaldehyde, and acetaldehyde. Scented candles are also worse than unscented candles as the synthetic fragrance creates more soot. Soy or beeswax candles burn cleaner and release fewer harmful chemicals.
