COSORI 9Qt 8-in-1 Dual Air Fryer
Skip until Cosori discloses nonstick coating chemistry or offers verification.
The COSORI dual air fryer coats its baskets and trays with nonstick material Cosori won't describe. No lab testing or PFAS-free statements exist for this product.
The better-graded swap
Big Boss
Big Boss Oil Less Fryer Air Fryer 16 Quart Replacement Clear Glass
75/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Nonstick-coated basket and trays; coating type undisclosed
Lab data
No public lab test
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What COSORI 9Qt 8-in-1 Dual Air Fryer is made of, ingredients and materials
The COSORI 9Qt features nonstick-coated baskets and trays, but the manufacturer has not publicly disclosed whether the coating is Teflon-type coating-based, ceramic, or proprietary. This opacity is the core safety concern. The fryer body is stainless steel and plastic housing; heating elements reach 400F+, which can degrade nonstick coatings if scratched or overheated. No published materials indicate lead or cadmium in any ceramic glazes or enamels, but the lack of third-party testing or brand certification means this cannot be ruled out.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Non-stick, chemistry undisclosed
Marketed as non-stick without stating the coating chemistry.
Teflon-type coating fume risk (nonstick coating degradation)
Nonstick coating type undisclosed by Cosori. If Teflon-type coating-based and heated above 400F or mechanically damaged, degradation can release fumes (polymer fume fever risk). No published incidents recorded for this model, but risk exists if coating integrity is compromised.
Coating flaking and particle inhalation
Repeated heating cycles and utensil contact gradually wear nonstick surfaces on baskets and trays. Flaked particles are a concern if ingested or inhaled over time, particularly in enclosed dual-chamber designs with less ventilation than traditional fryers.
Bacterial growth in hard-to-clean dual chamber
The dual-basket design creates crevices and narrow sections where oil residue and food particles can accumulate; if not thoroughly cleaned after each use, microbial growth is a mild hygiene concern rather than acute toxicity risk.
What’s reassuring
Aluminum leaching (if aluminum substrate exposed)
Basket and tray construction materials are not publicly detailed; if aluminum substrate is used and coating degrades, leaching into fatty foods is theoretically possible. No evidence this is occurring with Cosori products, but the material opacity prevents confirmation of risk.
Plastic housing off-gassing
Exterior plastic components may emit volatile organic compounds (VOCs) during initial use or with heat exposure near exhaust vents. No specific testing or complaints have been documented for this model; risk is typical for this product category.
How is this PFAS grade calculated?
The brand's record and disclosure
Cosori has maintained silence on PFAS content and nonstick chemistry across product lines, which is a transparency red flag in an industry where many competitors now offer Teflon-type coating-free or PFOA-free certifications. No major recalls specific to nonstick coating failures or toxic fume incidents have been publicly documented for this model. The brand does not appear to hold certifications from independent bodies (NSF, UL, GREENGUARD) that would verify coating safety or chemical absence.
How it compares in its category
Most competing dual air fryers in this size class (Ninja, Cosori, GoWISE USA) use similar undisclosed nonstick coatings, making Cosori not an outlier. However, premium brands like Misen and some Instant Pot models now advertise Teflon-type coating-free ceramic or proprietary coatings and provide ingredient transparency. Budget alternatives often have the same opacity issue, so this product's safety profile mirrors many peers rather than standing out as higher or lower risk.
If you buy it
Never preheat to maximum temperature (400F+) continuously; operate at 375F or below for routine cooking to slow coating degradation. Use only wooden, silicone, or soft plastic utensils; metal forks or abrasive scrubbers accelerate nonstick wear and can expose base materials. Inspect the basket and trays every 6-12 months; if coating flakes, peels, or visibly wears, replace or discontinue use to avoid inhalation of degraded particles. Hand wash with mild soap; dishwasher cycles can accelerate coating breakdown.
What is not known about PFAS in this product?
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Cosori has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to COSORI 9Qt 8-in-1 Dual Air Fryer?
- borosilicate glass, bare uncoated
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- Thermal shock and fracture
2 hazards checked on this product, all on its full breakdown.
- borosilicate glass
- We found no PFAS statement from the brand
- Aluminum leaching from base/housing
4 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- glass bowl, stainless steel exterior
- We found no PFAS statement from the brand
- Thermal stress and glass breakage
2 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonMore air fryers grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.