Pyrex · Roasting Pans
Pyrex Rectangular Roaster
Lower PFAS concern, borosilicate glass roaster has no nonstick or water-resistant coatings.
Pyrex Rectangular Roasters are made from borosilicate glass, a material not associated with PFAS use. Glass cookware does not require protective coatings, stain treatments, or water resistance, the primary sources of PFAS in consumer products. No lab data is publicly available, but the material composition itself presents lower concern.
Shop Pyrex on Amazon →Material
borosilicate glass
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cookware is a category where PFAS exposure is more common.
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
The full breakdown
What it's made of and why it matters
Pyrex rectangular roasters are borosilicate glass, a thermal shock-resistant material engineered with silica and boron oxide. This composition makes the glass chemically inert at typical cooking temperatures (up to around 500°F), meaning it will not leach metals, polymers, or chemical additives into food. Unlike ceramic-coated or enameled cookware, there is no glaze layer to degrade, flake, or contaminate food over time.
The brand's record and disclosure
Pyrex (owned by Instant Brands) has a long history as a kitchen staple with no major health or safety recalls tied to its glass roasters. The brand does not publish detailed safety certifications or third-party test results for heavy metals in glass composition, which is typical for glass manufacturers. Pyrex has not formally addressed PFAS or other emerging contaminants in marketing materials, though borosilicate glass roasters inherently carry no PFAS risk due to their material class.
How it compares in its category
Glass roasters are among the safest cookware options available; they carry none of the coating degradation or metal leaching risks of ceramic, enamel, or non-stick alternatives. Compared to stainless steel roasters (which can have nickel leaching concerns with acidic foods) or aluminum roasters (which may leach under acidic conditions), borosilicate glass is chemically neutral. The main trade-off is weight and fragility rather than safety.
If you buy it
Avoid rapid temperature swings (do not transfer directly from freezer to hot oven) to prevent thermal shock fractures. Hand-wash rather than use high-heat dishwasher cycles if possible, as repeated thermal stress can shorten lifespan. Inspect for chips or cracks before use and discard if damaged. These roasters have a 10-15 year lifespan with normal care and will not require replacement due to coating breakdown.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Thermal shock fracture (breakage)
Borosilicate glass is durable but can crack or shatter if exposed to rapid temperature changes (cold-to-hot or hot-to-cold). This is a mechanical failure, not a chemical hazard, but damaged glass can pose laceration risk and potential glass fragments in food.
Heavy metals in glass matrix (lead, cadmium, arsenic)
Borosilicate glass formulations used in modern cookware (Pyrex included) are not known to contain intentional lead or cadmium. No recalls or test results document leaching from intact Pyrex glass roasters into food under normal cooking conditions.
Coating degradation (glaze flaking, enamel chipping)
Pyrex rectangular roasters are uncoated borosilicate glass with no enamel, glaze, or surface treatment. This eliminates the primary degradation hazard that affects ceramic or enameled roasters.
Aluminum or metal leaching
Borosilicate glass roasters contain no aluminum cooking surface and no metal-to-food contact (handles may have metal bands, but these do not contact food). No leaching hazard is established for this material class.
Migration from polymer lids or seals
If the roaster is sold with a plastic or rubber lid, that component may off-gas or migrate volatile organics or phthalates, especially when heated. Check whether lids are silicone (lower risk) or PVC/polycarbonate (higher risk for BPA or phthalate migration). The glass roaster itself poses no risk.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 92% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Roasting Pans
Caraway
Ceramic Rectangle Pan
ceramic nonstick coating
Lower-concern nonstick option with PFAS-free claim and third-party certification; buy with reasonable confidence.
⚠Risky category by default
Caraway
16x13" Roasting Pan With Rack - Non-Stick Ceramic Coated Sage
Ceramic non-stick coating (Teflon-type coating-free, ceramic-based)
Lower PFAS concern, ceramic coating with verified PFAS-free claim and third-party certification.
⚠Risky category by default
Caraway
Home Small Rectangle Pan
Ceramic non-stick coating (Teflon-type coating and PFOA-free)
Lower-concern cookware choice; ceramic coating avoids traditional Teflon-family coating PFAS.
⚠Risky category by default
More roasting pans 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.