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Why Are Candle Additives Dangerous? Facts and Safety Guidelines | Oyasumi
Why are additives in scented candles dangerous and should you not buy them?
The scented candle market has grown significantly in recent years. With it, a trend has emerged for candles decorated with accessories: dried herbs, flowers, coffee beans, cinnamon sticks, stones, and shells. While such products are often eye-catching, aesthetics often conflict with safety and legality.
This post was created to provide a factual and fact-based explanation of why additives in scented candles are potentially dangerous and why responsible manufacturers never use them.
A scented candle is a product with an open flame.
A fundamental point that's easy to forget is this: a candle is a source of open flame . Every element placed inside it interacts directly with the flame, high temperature, and melted wax.
According to fire safety regulations, no flammable or thermally unstable materials should be placed near the flame. This is just a start.
Dried flowers and herbs – risk of ignition
Dried plants are one of the most common decorative additions. The problem is that:
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are flammable ,
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they can move towards the wick,
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may ignite directly from the flame.
- They can significantly increase the temperature of the container
In practice, this means the risk of sudden, uncontrolled ignition , which is not designed for in the candle's design.² Even if the herb is initially located far from the wick, it may shift position as the wax melts during burning.
Herbs, coffee, cinnamon and flowers – unpredictable chemical mixtures
Every scented candle is a chemical mixture subject to strict requirements. We calculate each mixture by analyzing numerous documents to ensure that combustion will not result in a reaction that could cause COPD, asthma, or cancer. When adding herbs, coffee, or cinnamon, those who do so often "forget" that most of these ingredients can release very harmful compounds upon combustion. The wonderful scent of cinnamon is a prime example.
Did you know that the safe concentration of cinnamic aldehyde in a candle is 0.01%?
Stones, shells and crystals – risk of cracking and shattering
Mineral additives are sometimes perceived as "safe because they don't burn." This is a very false assumption! Stones and shells:
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may contain microcracks,
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they heat up unevenly,
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may burst or explode under the influence of temperature ⁴.
Wax reaches a much higher temperature than you might think, and a sudden release of voltage in the stone can cause a splatter of hot wax. Nobody wants to be hit by a piece of stone that has exploded due to the heat.
Why are these candles still sold?
The reason is simple: they look impressive in photos . Social media values aesthetics over safety. Many such candles:
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does not pass safety tests - which is legally required!
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does not meet the performance standards - which is legally required!
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are sold without appropriate technical knowledge, as "collector's" candles - which is illegal!
It is worth remembering that the responsibility for the safety of the product rests with the manufacturer – but the risk and consequences are borne by the user .
How to recognize a safe scented candle?
Safe scented candle:
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does not contain additives embedded in the wax,
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has a stable wick,
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has a clear warning label - ALWAYS
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is designed for controlled combustion.
Aesthetics versus responsibility
At Oyasumi, we consciously forgo decorative additions in our candles. We believe that:
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fragrance should be an experience, not a risk,
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a candle is supposed to bring peace, not uncertainty,
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safety is an element of quality, not a compromise.
If a candle requires instructions like "be careful, something inside may catch fire", a "collector's candle" then it has not been designed properly .
Frequently asked questions about candle additives
Are additives in candles legal?
There is no direct ban, but many such products absolutely do not meet operational safety standards¹.
Can you burn a candle with additives very carefully?
You can also carefully walk on a rope over the abyss :)
Do additives improve the scent of a candle?
No. The scent comes from the fragrance composition, not from the herbs or spices.
Summary
Additives such as dried herbs, coffee, cinnamon, or stones in scented candles are not safe and do not enhance the quality of the fragrance. Their presence serves solely aesthetic and marketing purposes, often at the expense of the user's safety. Choosing a candle wisely means choosing a product designed for a calm, controlled burning experience.
Footnotes
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National Fire Protection Association (NFPA), Candles and Fire Safety
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National Candle Association, Why candles should be free of combustible materials
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IFRA, Guidelines on candle formulation and safe burning behavior
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Consumer Product Safety Commission (CPSC), Hazards associated with decorative elements in candles
