Pyrex · Dutch Ovens
Corning Ware Pyrex Spice Of Life 5 Quart Casserole A - 5 - B With Lid Dutch Oven
Lower PFAS concern, borosilicate glass cookware carries no known Teflon-family coating or intentional PFAS risk.
Pyrex's borosilicate glass casserole is made from inert glass, which does not require or use PFAS-based nonstick coatings or water-resistant treatments. No lab evidence of PFAS contamination in Pyrex glass cookware is publicly documented. This product poses lower concern compared to traditional nonstick aluminum or ceramic cookware.
Shop Pyrex on Amazon →Material
borosilicate glass with glass lid
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
This casserole is borosilicate glass, a silica-based material engineered to withstand thermal shock and resist chemical leaching. Unlike ceramic-glazed or enameled cast iron cookware, borosilicate glass does not use lead or cadmium-containing glazes and produces no Teflon-family coating fumes at normal cooking temperatures. The glass lid is also borosilicate, avoiding concerns with polycarbonate or other polymers that might leach during heating.
The brand's record and disclosure
Pyrex, owned by Corning, has a long-established reputation for safety in borosilicate glassware and maintains transparent product recall and safety protocols. The brand does not advertise PFAS-free status (common among glass manufacturers, as PFAS is not intentionally used in borosilicate cookware). Corning publishes safety data sheets and has not faced major recalls specifically tied to leaching or chemical hazards in borosilicate cookware lines.
How it compares in its category
Borosilicate glass Dutch ovens are among the safest cookware options for chemical exposure because the material is inert and non-reactive across normal cooking pH and temperature ranges. Unlike enameled cast iron (which can chip, exposing underlying metal), ceramic-coated aluminum (which may shed particles), or non-stick coatings (Teflon-type coating degradation risk above 500F), glass poses no coating integrity or leaching concerns. They trade durability and heat retention for transparency and chemical safety.
If you buy it
Avoid sudden temperature swings (cold liquid into a hot vessel) as borosilicate glass, while durable, can crack from thermal shock. Do not use on direct flame or electric coil stovetops; transfer to an oven or use on induction with a heat diffuser. Hand wash or use the top rack of a dishwasher. Inspect the rim and lid regularly for small chips; minor damage does not leach but larger cracks warrant replacement to prevent breakage during use.
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
Borosilicate glass is durable but can crack if exposed to rapid temperature changes (e.g., pouring cold liquid into a hot vessel or moving from oven to stovetop). This is a mechanical rather than chemical hazard.
Lead or cadmium in glass or glaze
Borosilicate glass formulations do not use lead or cadmium as colorants or stabilizers, and no recalls or test results for Pyrex borosilicate cookware have documented these metals above safe thresholds in normal use.
Teflon-type coating or non-stick coating degradation
This product is uncoated borosilicate glass with no Teflon-type coating, ceramic non-stick, or other polymeric coatings; no fume risk or coating shedding applies.
Microplastics or polymer leaching from lid
The lid is borosilicate glass, but the lid handle or knob (if plastic) could theoretically shed microplastics if directly immersed or heated above 100C repeatedly. Standard use (oven and stovetop) minimizes this risk.
Rim and edge shedding after chipping
If the glass rim or lip becomes chipped during use, small glass fragments can contaminate food or cause mouth cuts. Inspect regularly and replace if significant damage is visible.
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.
More dutch ovens 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.