If you have ever noticed a faint chemical smell coming from a new air fryer during its first few uses, part of what you are smelling may be flame retardant chemicals releasing from heated plastic. Every kitchen appliance sold in the US and EU must meet flammability safety standards - UL 858 in the US and IEC 60335 in Europe - and manufacturers achieve compliance by adding flame retardant chemicals directly into the plastic housing, internal brackets, wiring insulation, and circuit board materials.
These chemicals serve a legitimate safety purpose: they slow the spread of fire if an electrical fault ignites the appliance housing. The problem is that many of the most widely used flame retardants are now linked to serious health effects, particularly for developing children. And unlike a plastic container sitting in a cabinet, air fryer housings routinely reach elevated temperatures during normal cooking cycles, which accelerates the release of these chemicals into your kitchen air.
What Are Flame Retardants and Why Are They in Your Air Fryer
Flame retardants are not a single chemical. They are a broad class of additives - over 175 individual compounds are in commercial use - designed to make materials resist ignition or slow the spread of fire. In appliance plastics, two major families dominate:
Brominated flame retardants (BFRs) include polybrominated diphenyl ethers (PBDEs), hexabromocyclododecane (HBCD), and tetrabromobisphenol A (TBBPA). BFRs were the industry standard for decades because they are highly effective at suppressing combustion in polystyrene, polypropylene, and other thermoplastics. PBDEs are now restricted under the EU RoHS directive and the Stockholm Convention on Persistent Organic Pollutants, but TBBPA remains widely used in circuit boards and some housing plastics. BFRs are persistent - they accumulate in household dust, human tissue, and breast milk.
Organophosphate flame retardants (OPFRs) are the primary replacements for restricted BFRs. Common OPFRs include TCPP (tris(1-chloro-2-propyl) phosphate), TDCIPP (tris(1,3-dichloro-2-propyl) phosphate), and TPP (triphenyl phosphate). OPFRs are now found at higher concentrations in household dust than BFRs in many studies, because they have replaced restricted compounds without equivalent regulatory scrutiny. TDCIPP is listed under California Prop 65 as a known carcinogen.
Both families work by interfering with the chemical chain reactions that sustain combustion. Unfortunately, neither bonds permanently to the plastic matrix. They are additive chemicals - mixed in, not chemically bonded - which means they migrate out of the plastic over time, especially when heated.
Where Flame Retardants Are Found in Air Fryers
Not every component of an air fryer contains flame retardants, but several key areas typically do: