Non-Toxic Home Fragrance: 3 Hidden Toxic Compounds in Air Fresheners You Need to Know

Introduction

Air fresheners, scented candles, and reed diffusers have become indispensable in modern households to provide fresh olfactory experiences. This article will investigate the concept of non-toxic home fragrances, focusing specifically on aromatic room sprays, air fresheners, reed diffusers, and scented candles in indoor living spaces.

As consumers have become more aware of the health and environmental risks associated with synthetic fresheners and fragrances, there has been an increasing demand for non-toxic home fragrance products.

The Trio of Hidden Offenders in Home Fragrance Products

Fragrance makes a home feel warm and welcoming. But what if the same products you use for comfort are quietly polluting your indoor air? Scientific studies show that many candles, diffusers, and sprays release toxic compounds linked to respiratory issues, allergies, and even cancer risk.

Here are three offenders you should know about:

1. Formaldehyde

2. Acrolein

3. Synthetic Aldehydes (e.g., 3-Ethylbenzaldehyde)

Formaldehyde - The Silent Carcinogen

Found in emissions from synthetic fragrances and burning paraffin candles.
Health impact: Classified by WHO as a human carcinogen. Even short exposures indoors can exceed recommended safety limits.

Acrolein – The Immediate Irritant

Released during the combustion of paraffin wax and scented oils.
Health impact: Triggers coughing, eye irritation, and asthma attacks. Long-term exposure damages lung tissue.

3-Ethylbenzaldehyde – The Overlooked Allergen

Most studies concur that 3-Ethylbenzaldehyde is a detectable VOC emitted from consumer fragrance products such as plug-in air fresheners and reed diffusers, contributing to indoor air pollution and raising concerns about respiratory irritation.

These three compounds, Formaldehyde, Acrolein, and 3-Ethylbenzaldehyde, can be released and/or synthesised in the surrounding environment through air fresheners, scented candles, and reed diffusers during and after generating a pleasant aroma.

Several studies have successfully identified and quantified Formaldehyde and Acrolein, including 3-Ethylbenzaldehyde emissions from consumer fragrance products using advanced analytical techniques such as gas chromatography-mass spectrometry and passive sampling methods, providing valuable data on indoor concentration ranges and emission sources (Cheng, 2023) (Warburton et al., 2023) (Ali et al., 2024).

Air Fresheners & Room Sprays

While air fresheners may seem like a quick and easy solution to eliminate odours in the home/office, they can actually create a number of health problems for those who are sensitive to synthetic aroma chemicals and solvents. Some people may be more susceptible to the effects of air fresheners than others. It is important for individuals to be aware of their own sensitivities and to take appropriate precautions when using air fresheners and aromatic room sprays.

VOCs & Formaldehyde Precursors

Air fresheners can release harmful volatile organic compounds (VOCs) that may contribute to synthesise formaldehyde in the air and aid to poor indoor air quality. The absence of comprehensive disclosure requirements for the chemical ingredients in these products is a significant issue (Steinemann, 2009).

Some very popular air fresheners also contain propellants, such as, butane and propane.

The Composition of Scented Candles

Scented candles typically contain a blend of waxes, fragrance oils, and sometimes dyes. These waxes include soy, paraffin, coconut, and vegetable-based waxes.

The Emission Characteristics of Scented Candles

When burned, scented candles release volatile organic compounds. Acrolein can be released from scented candles, especially those containing certain fragrances that break down into acrolein when heated.

Burning scented candles can release various pollutants into indoor air, including aldehydes, benzo(a)pyrene, sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter (PM) . These pollutants can affect indoor air quality and potentially pose health risks if exposure is chronic.

The Composition of Reed Diffusers

Reed diffusers utilize essential oils or synthetic fragrance oils suspended in a carrier liquid, such as alcohol, glycol ethers, isopropyl alcohol, and other organic solvents. Reed diffusers are commonly used to disperse fragrances in indoor spaces, and they typically consist of a bottle filled with a fragrance solution and reeds that absorb and release the scent into the air.

The Emission Characteristics of Reed Diffusers

Reed diffusers continuously release their fragrance components into the air, potentially leading to prolonged exposure to volatile organic compounds (Kim et al., 2015) (Guillaume et al., 2021). The studies indicate that 3-ethylbenzaldehyde is one of the main volatile organic compounds (VOCs) emitted from chemically synthesized fragrances used in reed diffusers, which is known to be a strong respiratory irritant.

The exposure to 3-ethylbenzaldehyde and formaldehyde in indoor environments can be a cause of concern as it is known to have adverse effects on human wellbeing (Cheng et al., 2023). Prolonged emissions of 3-ethylbenzaldehyde in indoor environments can further exacerbate indoor air quality issues.

Critical Analysis of Available Scientific Data

Most studies concur that Formaledehyde, Acrolein , and 3-Ethylbenzaldehyde are detectable VOCs emitted from consumer fragrance products such as scented candles, plug-in air fresheners and reed diffusers, contributing to indoor air pollution and raising concerns about respiratory irritation.

There is broad agreement about the need for sensitive analytical methods, predominantly involving GC-MS, for precise identification and quantification of this compound. Health impacts linked to exposure often focus on respiratory and systemic effects, though the level of risk varies depending on emission concentrations and exposure scenarios.

Our Natural Solution: Antioxidant-Enhanced Aromatic Room Spray

We found that incorporating antioxidants like ferulic acid into the spray formulation can decrease the formation of formaldehyde. Belle’Gard Moringa & Ginkgo Room Spray employs this technology using Ferulic acid and G. biloba for indoor environments and bedlinen. This can also aid in neutralizing ozone.

Our beautiful aromatic room sprays contain essential oils with sesquiterpenes, which are larger molecules compared to monoterpenes and generally react more slowly with ozone. This very slow reaction rate affects the concentrations of formaldehyde and other by-products in indoor air.

About the Author

Manoj Jain

Manoj has more than two decades of hands-on experience working at the bench formulating products and active ingredients for personal care.

Manoj's expertise in formulation science is extensive, encompassing areas such as cosmetic chemistry, emulsion science, lipid chemistry, hydrocolloids, antimicrobial and preservation technologies, extraction processes, analytical toxicology, and nutritional bio-chemistry.

He is committed to developing substances that are naturally compatible with the skin, bodily systems, and psyche, thereby promoting the strengthening and restoration of health for the body, mind, and spirit. Through his writing, Manoj translates complex science into clear, practical insights that empower readers to make informed choices about beauty, health, and wellbeing.

Stay Ahead with Evidence-based Beauty & Wellness Tips

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Disclaimer:

This information is intended solely for educational purposes and should not be considered as a substitute for professional health advice.