Parchment paper is safe for everyday baking and cooking when used within its rated temperature range, typically 420–450°F. It is not a significant health concern for most people. That said, there are some nuances worth understanding, particularly around the coatings used, the type of parchment you buy, and what happens at very high temperatures.
What Parchment Paper Is Made Of
Parchment paper starts as ordinary paper that gets treated with an acid bath to make it dense, moisture-resistant, and heat-stable. To create a non-stick surface, manufacturers coat it with silicone, a food-grade polymer. This silicone coating is the main reason parchment paper works so well for baking: it prevents food from sticking without added oil or butter.
The silicone used is called polydimethylsiloxane (PDMS), the same type of silicone found in food-grade baking mats, medical devices, and cosmetics. Researchers at a mass spectrometry lab confirmed that PDMS does transfer from parchment paper onto the contact surface of baked cookies and pizzas during normal oven use. The amounts detected were trace-level, and PDMS is broadly considered biologically inert, meaning your body doesn’t absorb or react to it in any meaningful way. It passes through the digestive system without being broken down.
The PFAS Question
A more pressing concern is whether parchment paper contains PFAS, the group of persistent synthetic chemicals sometimes called “forever chemicals.” PFAS are intentionally added to some food-contact paper products to repel water, oil, and grease. A review published in the journal Foods found PFAS in multiple types of food-contact materials, and baking paper was specifically listed among the products tested. Samples of baking paper from Australia and Denmark both showed detectable levels of various PFAS compounds, and migration into food or food simulants was confirmed in Korean testing of baking paper products.
Not all parchment paper contains PFAS. Products coated only with silicone generally do not. The risk is higher with cheaper or less-regulated brands, and with products that emphasize grease resistance rather than simple non-stick performance. Because labeling requirements for PFAS in food-contact paper are still limited, choosing a brand that explicitly states it is PFAS-free is your most reliable option.
Bleached vs. Unbleached Parchment
White parchment paper gets its color from a bleaching process, often using chlorine or chlorine-based compounds. This process can produce dioxins, a class of toxic chemicals that persist in the environment and accumulate in the body over time. The trace amounts of dioxin residue potentially left on bleached parchment paper are extremely small, but they represent an avoidable exposure.
Unbleached parchment paper, the brown or tan variety, skips this step entirely. It performs identically in the oven and carries no dioxin-related concern. If you’re looking for the simplest way to reduce any chemical exposure from parchment paper, switching to unbleached is the easiest change.
Quilon-Coated Paper: A Different Product
Some baking papers are coated with Quilon instead of silicone. Quilon contains chromium, a heavy metal that can leave toxic trace elements, particularly when the paper is incinerated or exposed to very high heat. Quilon-coated papers are less common in consumer products today but still exist, especially in commercial and institutional food service settings. These are not the same as silicone-coated parchment paper, and they carry a higher risk profile. If a product doesn’t specify its coating type, silicone-coated is the safer bet.
What Happens at High Temperatures
Most parchment paper is rated for 420–450°F. Within that range, the primary thing it releases is water vapor, which evaporates off the paper up to about 300°F. Thermal analysis testing shows that at 450°F (230°C), parchment paper begins releasing carbon monoxide, carbon dioxide, and very small traces of methanol and formic acid as the paper itself starts to decompose. These gases dissipate into the oven and out through ventilation. They don’t deposit onto food in meaningful quantities.
If parchment paper exceeds its rated temperature, it won’t suddenly become toxic. It will darken, become brittle, and eventually char. The concern at that point is fire risk, not chemical exposure. In a standard home oven or an air fryer operating at 400°F or below, parchment paper stays well within its safe range.
Parchment Paper vs. Silicone Baking Mats
Reusable silicone baking mats are often suggested as a healthier or more eco-friendly alternative. Thermal testing tells an interesting story here. Parchment paper loses about 5% of its mass during a heating cycle at 450°F, mostly as water and harmless gases. A silicone baking mat loses only 0.4% of its mass under the same conditions, but it releases trace silicone degradation products along with carbon dioxide. Both products are considered safe at normal baking temperatures, and the amounts of any released compounds are very small in both cases.
The practical difference is environmental rather than health-related. Parchment paper is single-use, while a silicone mat can last for years. From a pure chemical-exposure standpoint, neither poses a significant risk during normal baking.
How to Use Parchment Paper Safely
Stay within the temperature printed on the box. Most brands are rated to 420–450°F, but it varies, so check. In an air fryer, always place food on top of the parchment before turning the appliance on. The paper is light enough to blow into the heating element during preheating, which creates a fire hazard. Cut sheets slightly smaller than your pan or basket so hot air can circulate properly, and avoid using parchment with very wet foods, which can make it soggy and tear.
For the lowest possible chemical exposure, choose unbleached, silicone-coated parchment paper from a brand that explicitly states it is free of PFAS and Quilon. This combination avoids dioxin residues from bleaching, forever chemicals from fluorinated coatings, and heavy metals from chromium-based treatments, while still giving you a reliable non-stick surface for everyday cooking.