THE LABEL FILES · Air Fresheners
What's Actually in Your Air Freshener
A device that runs in your closed bedroom all night legally discloses exactly one ingredient: “Fragrances.”
A Febreze plug-in runs continuously in your enclosed room, and its official ingredient disclosure is a single word: 'Fragrances.' No solvent, no preservative, no individual chemicals named, for a product whose entire job is to fill the air you breathe for hours. Of every category in the Label Files, this is the one where you're told the least about the most continuous exposure.
The one-word black box
Air fresheners and candles are barely regulated for disclosure. Glade discloses dozens of fragrance chemicals; Febreze's plug-in discloses one word. Inside that box can sit phthalates, endocrine disruptors used as fragrance fixatives that the US never requires on a label. You can't avoid what you're not allowed to see, and a plug-in gives you the maximum dose of exactly that.
The formaldehyde you make in your own living room
Here's the part almost nobody knows: limonene and linalool, common 'fresh' and 'floral' scent chemicals, react with the ozone already in your indoor air to form formaldehyde, a Group 1 carcinogen. It's not in the bottle; your room manufactures it. Chamber studies measured it forming during normal air-freshener use. The pleasant citrus smell is, chemically, a reaction in progress.
Candles aren't innocent either
A paraffin candle is petroleum wax, and burning it releases soot and trace VOCs including aldehydes. The honest framing matters: an occasional candle in a ventilated room is low-risk. A plug-in or candle burning continuously in a closed bedroom is where the exposure quietly accumulates. Ventilation, not abstinence, is the actual fix.
The teardowns
Febreze Plug Air Freshener →
One word on the label. No carrier solvent named. No preservative. No fragrance components. A continuously operating device with the most opaque disclosure reviewed.
Glade PlugIns Scented Oil →
SC Johnson voluntarily names every fragrance chemical. The story is what those chemicals do when ozone is in the room: terpene oxidation produces formaldehyde, a Group 1 carcinogen.
Yankee Candle Scented Candle (jar, all fragrances) →
The Yankee Candle SDS names ‘aldehydes, wax fumes and smoke’ as hazardous decomposition products. Combustion chemistry, not ingredient fear, but ventilation is non-negotiable.
The ingredients, graded
Editorial analysis of publicly listed labels and regulatory/peer-reviewed sources. Not medical advice. Verdicts are evidence-graded, we flag what the data flags and clear what it clears.