Calphalon Signature Hard-Anodized Nonstick Wok, Is It Non-Toxic?
Avoid this Teflon-type coating nonstick cookware; better options exist.
This Calphalon wok uses traditional Teflon-type coating nonstick coating, a Teflon-family coating that contains or releases PFAS. The brand offers no PFAS-free claim or independent testing.
The better-graded swap
Our Place
Our Place Carbon Steel Wok
100/100 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
Hard-anodized aluminum with Teflon-type coating-based nonstick coating
Lab data
No public lab test
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Is Calphalon Signature Nonstick Wok non-toxic? What it is made of
This wok uses hard-anodized aluminum as its base layer, a process that creates a dense oxide surface making the metal harder and more corrosion-resistant than bare aluminum. The nonstick surface is Teflon-type coating-based (polytetrafluoroethylene, commonly known as Teflon), a Teflon-family coating applied over the anodized layer. Hard-anodized aluminum itself does not leach aluminum into food under normal cooking conditions because the oxidation layer acts as a barrier. However, the Teflon-type coating is where chemical concerns arise, Teflon-type coating manufacturing and degradation can involve PFAS compounds, and overheating (above 500 degrees Fahrenheit) can cause the coating to break down and release fumes.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
PTFE / Teflon confirmed
Uses Teflon-type coating (Teflon), a Teflon-family coating in the PFAS family.
Teflon-type coating degradation and fume inhalation
Teflon-type coating breaks down above 500 degrees Fahrenheit, releasing fumes that can cause polymer fume fever (flu-like symptoms in humans and acute toxicity in birds). This product carries standard Teflon-type coating risk if overheated.
Coating peeling and microparticle ingestion
Extended use or damage to the Teflon-type coating layer can result in flaking particles entering food. While Teflon-type coating itself is inert if ingested, the coating's degradation indicates loss of nonstick protection and potential for metal exposure.
PFAS
Teflon-type coating-based nonstick coatings are manufactured using PFOA and other PFAS compounds, and residual PFAS or breakdown products may remain; Calphalon has not disclosed or verified PFAS levels. This is graded separately per instructions but remains the primary chemical hazard.
Source, ATSDR ↗What’s reassuring
Aluminum leaching from base metal
Hard-anodized aluminum's oxide barrier effectively prevents aluminum from leaching into food under normal cooking conditions; this hazard is not documented for properly maintained hard-anodized cookware.
Heavy metals
This wok uses Teflon-type coating nonstick only, not ceramic glazes or enamel, so lead or cadmium in decorative coatings is not a concern for this specific product.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Calphalon (owned by Groupe SEB) has not published a detailed public stance on PFAS content or elimination timelines for its nonstick cookware lines. The company has not sought third-party certifications (such as Greenguard or similar) for this product category to verify low-chemical formulations. Calphalon has faced no major recalls specifically for chemical contamination in nonstick cookware, though the broader Teflon-type coating nonstick industry has faced scrutiny from public health advocates regarding PFAS exposure pathways. The brand's silence on PFAS disclosure is typical of mainstream cookware manufacturers but represents a gap compared to brands actively phasing out Teflon-type coating.
How it compares in its category
In the wok category, hard-anodized aluminum with Teflon-type coating nonstick is a mid-market standard offering comparable in price and performance to other mainstream brands (T-fal, Circulon, etc.). Ceramic-coated woks and stainless steel woks exist as lower-PFAS alternatives but often have less durable nonstick performance and higher price points for quality versions. Cast iron woks offer zero nonstick coating hazards but require seasoning and maintenance that Teflon-type coating users avoid. Calphalon's Signature line sits at the conventional end of the spectrum, not differentiated by reduced-chemical formulations.
If you buy it
Never preheat an empty wok or exceed 400 degrees Fahrenheit to avoid Teflon-type coating breakdown and fume release; use medium to medium-high heat only. Hand-wash gently with soft sponges to avoid scratching the coating, which accelerates degradation and potential PFAS particle shedding. Replace the wok if the nonstick surface shows visible peeling, scratches exposing the aluminum base, or discoloration, as these are signs the coating is failing. Store with a paper towel between the wok and lid to prevent friction damage.
What is not known about PFAS in this product?
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Calphalon 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 Calphalon Signature Hard-Anodized Nonstick Wok?
- carbon steel (bare metal, no coating)
- The brand calls it PFAS-free, which we have not verified
- Iron leaching from bare metal surface
2 hazards checked on this product, all on its full breakdown.
- Stainless steel with no nonstick coating
- Metal leaching (chromium, nickel, iron)
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- ceramic non-stick coating (ceramic-type)
- The brand calls it PFAS-free, which we have not verified
- Ceramic coating degradation and substrate exposure
3 hazards checked on this product, all on its full breakdown.
More woks 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.