Microwave Safety: Is Pyrex Safe in the Microwave

Is Pyrex Safe in the Microwave

Pyrex is safe for use in the microwave. Pyrex is specially designed to withstand high heat, and it’s safe to use in the microwave.

Pyrex dishes are made of tempered glass and can withstand sudden temperature changes. So, you can safely reheat your leftovers or cook your food in a pyrex dish in the microwave. Pyrex dishes are also dishwasher safe, which makes cleaning up easy.

Additionally, you can use pyrex dishes for baking, broiling, and storing leftovers. Pyrex is a reliable and safe brand that has been a household name for over a century. In this article, we will discuss the advantages of using pyrex in the microwave and the safety precautions you need to take while using it.

Is Pyrex Safe in the Microwave
Is Pyrex Safe in the Microwave




Myth #1: Pyrex Dishes Cannot Handle High Temperatures

Explanation Of Myth And How It Started

Pyrex dishes have been around for over 100 years, and one of the most common myths surrounding them is that they shatter or explode when exposing them to high temperatures. This myth started when the company changed its formulation for manufacturing pyrex from using borosilicate glass to soda-lime glass in the 1980s.

The change led to reports of pyrex dishes breaking when exposed to high temperatures in the oven or microwave.

Disputing The Myth Through Facts And Research

Contrary to popular belief, pyrex dishes aren’t prone to breakage when exposed to high temperatures, as long as they’re used properly. Here are some facts and research to dispute this myth:

  • Pyrex is heat-resistant and can handle high temperatures of up to 932°f (500°c) without warping or breaking.
  • Pyrex dishes are made with tempered glass, which undergoes a special process to increase its strength and durability.
  • The american-made pyrex dishes, as well as the original uk pyrex dishes, are still made with borosilicate glass, which is highly heat-resistant.
  • Reports of pyrex dishes breaking likely stem from improper use, such as placing a pyrex dish directly on a hot stovetop or heating an empty dish in the oven.
  • Pyrex dishes can develop cracks or break when exposed to sudden temperature changes, such as transferring a hot dish directly from the oven to a cold surface.

Information On The Safe Temperature Range For Pyrex Dishes In Microwaves

When using pyrex dishes in microwaves, it’s essential to follow the manufacturer’s instructions and guidelines. Here’s what you need to know about the safe temperature range for pyrex dishes in microwaves:

  • Pyrex dishes are safe for use in the microwave, but not all pyrex dishes are microwave-safe. Check the manufacturer’s label or instructions before using a pyrex dish in the microwave.
  • The safe temperature range for pyrex dishes in microwaves is 300-350°f (149-177°c). Use caution when heating dishes to avoid sudden temperature changes.
  • When heating liquids or foods in pyrex dishes in microwaves, it’s essential to use a microwave-safe cover or lid to prevent splatters or spills.
  • Avoid using damaged pyrex dishes or those with cracks, chips, or scratches, as they’re more prone to breaking or shattering.

Pyrex dishes are safe for use in the microwave, and they can handle high temperatures of up to 932°f (500°c) when used correctly. To avoid breaking or shattering, handle pyrex dishes with care, follow the manufacturer’s instructions, and use caution when heating dishes in the microwave.

Myth #2: Pyrex Dishes Are Prone To Shattering In Microwaves

Explanation Of Myth And How It Started

There’s a commonly held belief that pyrex dishes can shatter in the microwave, but where did this myth come from? The short answer is that there’s no one cause behind it. Some theories include:

  • Pyrex dishes used to be made from soda lime glass, which was more prone to shattering than the borosilicate glass used today.
  • Some consumers may have used pyrex dishes improperly, causing cracks that later led to shattering.
  • Over time, microwaves have become more powerful, and this could be a contributing factor to pyrex dishes shattering.

Disputing The Myth Through Facts And Research

While there’s no one cause behind the myth, it’s important to note that pyrex dishes are safe for use in the microwave. This has been backed up by research studies. Here are some other important points to consider:

  • In 2008, consumer reports conducted tests on pyrex dishes and found that they broke “from every direction” when dropped on the ground, but they did not shatter when placed in the microwave.
  • In 2010, the good housekeeping research institute conducted tests on pyrex dishes and found that they did not shatter in the microwave, even when the dishes had cracks or chips.
  • There are now pyrex dishes specifically designed for microwave use. These dishes have a vented lid that allows steam to escape and prevents the build-up of pressure that could lead to shattering.

Information On The Cause Of Shattering And How To Prevent It

While pyrex dishes are safe for use in the microwave, shattering can still occur in certain circumstances. Here are some tips for preventing shattering:

  • Don’t use pyrex dishes that are visibly cracked, chipped, or damaged in any way.
  • Avoid sudden temperature changes. For example, don’t take a pyrex dish straight from the fridge and put it into the microwave. Let it come up to room temperature first.
  • Don’t put hot pyrex dishes on cold or wet surfaces, such as a granite countertop or a wet dish towel.
  • Make sure your pyrex dish is microwave safe. Look for the microwave-safe symbol on the bottom of the dish before using it in the microwave.

By following these tips, you can safely use pyrex dishes in the microwave without fear of shattering.



Myth #3: Pyrex Dishes Release Harmful Chemicals When Heated

Explanation Of Myth And How It Started

Pyrex dishes are a kitchen staple, but over the years, several myths about their safety have emerged. One of the biggest myths is that pyrex releases harmful chemicals when heated in the microwave or oven. But is it true?

The myth possibly emerged due to a 2010 incident in oklahoma where a pyrex dish suddenly shattered, injuring a woman. It was said that the dish broke due to a manufacturing defect. However, some reports suggested that the reason for the breakage was that the dish was heated on the stove or exposed to sudden temperature changes.

Nonetheless, this unfortunate incident brought concerns over the safety of pyrex dishes.

Disputing The Myth Through Facts And Research

Studies and experiments have been conducted to determine if pyrex dishes release any harmful chemicals when heated. Research has indicated that pyrex is safe to use in the microwave and oven, and does not release any dangerous chemicals when exposed to heat.

In fact, pyrex has been designed to withstand high temperatures and sudden temperature changes. This has been made possible due to the borosilicate glass that is used in making pyrex. Borosilicate glass is resistant to thermal shock, which means it is less likely to crack or break when exposed to sudden change in temperature.

Explanation Of The Safety Standards Pyrex Dishes Undergo Before Being Made Available For Use

Pyrex has been manufacturing cookware for over a century, and they have standards in place to ensure the safety of their products. Before being sold to the public, pyrex dishes undergo several safety tests, including thermal shock resistance and temperature stress test.

Pyrex is also compliant with fda regulations, which ensure that the materials used in their products are safe for food use. This means that pyrex dishes are free of lead and cadmium, which are harmful to health. Moreover, pyrex dishes are dishwasher safe, making cleaning and maintenance much easier.

Pyrex dishes have been a trustworthy and safe option for homeowners for many years. The myth that pyrex dishes release harmful chemicals when heated has been debunked through research. Pyrex undergoes several safety tests and is compliant with fda regulations, which ensure the safety of the materials used.

As long as pyrex dishes are used and maintained correctly, they can be safely used in the microwave or oven without any concerns.

Myth #4: Any Glass Dish Can Be Used In The Microwave

Explanation Of Myth And How It Started

Microwaving food has become an inevitable part of our daily lives. One of the common misconceptions that people have come to believe is that any glass dish can be used in the microwave. This myth dates back to the time when pyrex dishes were introduced in the market.

People assumed that since pyrex dishes are made of glass, they are safe to use in the microwave. This is where the problem began.

Disputing The Myth Through Facts And Research

It is not entirely true that any glass dish can be used in the microwave. Pyrex dishes may be made of glass, but that does not necessarily mean that they are microwave safe. Here are some facts and research to dispute this myth:

  • Pyrex dishes made before 1998 have a higher chance of cracking in the microwave due to changes in their manufacturing process.
  • Even pyrex dishes made after 1998 may not be microwave safe if they have any cracks, chips or scratches on them because microwave radiation can seep into the dish and cause it to break.
  • Glass dishes that are not specifically tested and labeled as microwave-safe can absorb microwave radiation, which may cause them to shatter or explode.

Explanation Of The Difference Between Microwave-Safe And Non-Microwave-Safe Glass Dishes

It is essential to understand the difference between microwave-safe and non-microwave-safe glass dishes. Here is what you need to know:

  • Microwave-safe dishes are specifically designed and tested to handle the heat generated by the microwave. They are usually labeled with a microwave-safe symbol, which typically looks like a microwave with three wavy lines above it.
  • Non-microwave-safe dishes are not tested or designed to handle the heat generated by a microwave. They may contain small air pockets, bubbles, or scratches that can expand and contract due to the heat produced by the microwave, causing the dish to shatter or explode.

It is crucial to ensure that you use microwave-safe dishes when heating food in the microwave. Although pyrex dishes may be appealing and versatile, it is advisable to check that they specifically labeled as microwave-safe before using them in your microwave.

Stay safe and enjoy your food!

Tips For Safe Use Of Pyrex Dishes In Microwaves

Explanation Of The Proper Way Of Handling Pyrex Dishes In Microwaves

Pyrex dishes are a popular choice in many homes due to their durability and versatility. However, using them in a microwave requires proper handling to ensure safety. Here are some key points:

  • Always check the pyrex dish for cracks or scratches before use, as these can cause it to break in the microwave.
  • Avoid using pyrex dishes with metallic trims or decorations, as these can cause sparks in the microwave.
  • Place the pyrex dish on a microwave-safe plate or tray to prevent heat from damaging the turntable.
  • Use oven mitts or a thick towel when handling a pyrex dish from the microwave, as it can become hot to the touch.

Tips For Maintaining The Longevity Of Pyrex Dishes

Like any product, pyrex dishes require proper care to last longer. Here are some tips to help you maintain the longevity of your pyrex dishes:

  • Do not place hot pyrex dishes on a cold surface or submerge them in cold water, as this can cause them to shatter.
  • Avoid using abrasive sponges or cleaners on your pyrex dishes, as they can scratch the surface and cause damage.
  • Store your pyrex dishes in a cool, dry place away from direct sunlight or extreme temperatures.

Remember, proper care and maintenance can significantly extend the lifespan of your pyrex dishes.

Explanation Of The Importance Of Following Instructions On Pyrex Dishes And Microwaves For Better Safety

Reading the instructions on your pyrex dish and microwave may seem like a hassle, but it is essential for maintaining safety. Here are some reasons why:

  • Pyrex dishes are made with different materials and designs, each with specific instructions for use.
  • Microwaves also vary in features and power, and incorrect use can cause damage to the microwave or even start a fire.
  • Following the instructions on both the pyrex dish and microwave can prevent damage to both the equipment and the food being heated.

Taking the time to read and follow instructions can help prevent accidents and ensure that your pyrex dishes and microwave last longer. So, always take the instructions seriously and follow them as directed for better safety.

Frequently Asked Questions For Is Pyrex Safe In The Microwave

Is Pyrex Safe In The Microwave?

Yes, pyrex is safe to use in the microwave. Pyrex glass is made from borosilicate glass, which can withstand a lot of heat and temperature variations.

Can Pyrex Explode In The Microwave?

Pyrex can explode in the microwave if it has a chip, crack, or scratch on its surface. To prevent this, inspect your pyrex before use and avoid using it if it has any damage.

What Is The Maximum Temperature For Pyrex In The Microwave?

Pyrex can withstand temperatures up to 450°f (230°c) in the microwave. It’s best to check your specific pyrex product’s safety instructions for specific temperature limits.

Can Pyrex Go Straight From The Freezer To The Microwave?

Yes, pyrex can go from the freezer to the microwave or oven, but it should be at room temperature before cooking or reheating. Rapid temperature changes can cause the glass to crack or break.

Is Pyrex Better Than Plastic For The Microwave?

Yes, pyrex is a better option than plastic for the microwave because it is non-toxic and can withstand high temperatures without warping or melting. It is also better for the environment as it is reusable and recyclable.


Based on the research conducted in this blog post, it is safe to assume that pyrex is generally safe to use in a microwave. However, there are certain precautions that need to be taken to ensure maximum safety. It is important to note the age and condition of the pyrex before microwaving, as well as avoiding sudden temperature changes.

If you follow these guidelines, pyrex can be a reliable option to use in your microwave. It’s always a good idea to read and understand the manufacturer’s instructions before use. Pyrex is safe in the microwave as long as proper safety measures are taken.

So whether you are reheating your leftovers or cooking a new dish, pyrex can be a convenient and safe option for your microwave needs.


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