Pyrex · Roasting Pans
Pyrex Basics Glass Bakeware 4 QT Roaster
Lower PFAS concern, plain borosilicate glass has no chemical coatings.
Pyrex Basics Glass Bakeware is made from borosilicate glass with no nonstick or protective coating, meaning no Teflon-family coating or PFAS chemistry involved. Glass cookware is a well-established lower-concern material for food contact. Pyrex does not market PFAS-free claims because the product category inherently avoids such chemicals.
Shop Pyrex on Amazon →Material
borosilicate glass, no coating
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.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
This roaster is borosilicate glass, a thermal-resistant silicate formulation designed to withstand oven temperatures without leaching. Unlike soda-lime glass, borosilicate contains silica and boron compounds that fuse at higher temperatures, creating an inert, non-porous surface. No ceramic enamel, non-stick coating, or glaze is applied to this product, eliminating common sources of lead, cadmium, or synthetic chemical leaching into food.
The brand's record and disclosure
Pyrex (currently owned by Instant Brands) has maintained a long-standing reputation for glass cookware safety without major recalls related to chemical contamination. The brand does not publicly market PFAS-free status, likely because borosilicate glass is inherently free of fluorinated compounds. No established controversies regarding heavy metals or coatings in Pyrex Basics line products are on record.
How it compares in its category
Borosilicate glass roasters like this Pyrex model are among the safest roasting pan materials available. Metal roasters (steel, aluminum, cast iron) can leach iron or aluminum under acidic conditions; ceramic-coated versions may harbor lead in older stock or decorative glazes. Glass roasters eliminate these risks entirely, though they are heavier and more prone to breakage than metal alternatives.
If you buy it
Use this roaster on oven racks at temperatures up to the stated limit (typically 425-500F depending on Pyrex line). Avoid rapid temperature changes (e.g., moving from freezer to hot oven) to prevent thermal shock and cracking. Hand wash to extend life; dishwasher use is generally safe but can dull surfaces over time. Replace if chips or cracks appear, as they can propagate and compromise structural integrity.
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 and fracture
Borosilicate glass is more resistant to thermal shock than soda-lime glass but can still crack if subjected to rapid temperature changes. This is a mechanical safety hazard rather than chemical, but creates sharp edges and potential glass fragments in food.
Heavy metal leaching from glass
Borosilicate glass formulations do not inherently leach lead, cadmium, or arsenic under normal cooking conditions. No recalls or published test failures for Pyrex Basics roasters on heavy metal contamination are on record.
Manufacturing residue or surface contaminants
Pyrex glassware undergoes industrial annealing and quality control. No established incidents of mold, bacterial biofilm, or manufacturing chemical residue on uncoated glass roasters from this brand.
Coating degradation (not applicable)
This product has no applied coating, eliminating risks of enamel chipping, non-stick layer breakdown, or particulate ingestion. The risk class does not apply to uncoated borosilicate.
Allergen or fragrance exposure
Glass roasting pans do not incorporate fragrance compounds, dyes, or flame retardants. No off-gassing or volatile organic compound emissions are associated with plain borosilicate glass.
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.