Safety Concerns of Using Stainless Steel Utensils in Cooking

Issues with the Use of Stainless Steel Cutlery

Hello, doctor.
I would like to ask if there are safety concerns with frequently placing 304 stainless steel utensils (chopsticks, spoons, forks) in a rice cooker for heating (three times a day).
Also, can silicone sponges really withstand temperatures up to 230 degrees Celsius? If I directly place them in boiling water for disinfection, will they release harmful substances? Since I have never used them before, I am not very clear about this.
Additionally, could you please tell me if tap water from the faucet is treated and whether it may still contain Helicobacter pylori?

Mr. Li, 20~29 year old female. Ask Date: 2023/05/24

Dr. Xie Peiru reply Nutrition

Dear Mr.
Lee,
1.
It is recommended not to use steel brushes to clean stainless steel, as this can easily cause scratches that trap dirt and lead to rust.
Additionally, avoid storing highly acidic or alkaline foods, as they can cause corrosion and potentially leach heavy metals.
The heating temperature should not exceed 100-200 degrees Celsius for prolonged baking (the temperature of commercial dish warmers is typically between 55-70°C), which should be safe.
2.
Can silicone sponges really withstand temperatures up to 230°C? If the manufacturer is reputable, they should be able to withstand that temperature safely.
However, it is advisable to soak them in boiling water for 3-5 minutes.
Wishing you good health!
Nutrition Department, Qiyi Medical Center

Reply Date: 2023/05/24

More Info

When it comes to the safety of using stainless steel utensils, particularly those made from 304 stainless steel, there are several important factors to consider. The 304 series is known for its durability and resistance to corrosion, making it a popular choice for kitchen utensils such as chopsticks, spoons, and forks. Using these utensils in a rice cooker or steamer multiple times a day, as you mentioned, is generally safe. However, there are a few precautions to keep in mind.

Firstly, while 304 stainless steel is resistant to rust and corrosion, it is still advisable to avoid exposing it to highly acidic or alkaline foods for extended periods, as this can lead to pitting or corrosion over time. Additionally, while heating stainless steel utensils, it is recommended to keep the temperature below 200 degrees Celsius (392 degrees Fahrenheit) for prolonged periods. Short bursts of heat, such as those encountered in a rice cooker, should not pose a significant risk, provided the utensils are in good condition and not scratched or damaged.

Regarding silicone scrubbers, they are often marketed as heat-resistant, with many claiming they can withstand temperatures up to 230 degrees Celsius (446 degrees Fahrenheit). If the manufacturer is reputable and the product is certified for such temperatures, it should be safe to use. However, when it comes to sanitizing silicone scrubbers in boiling water, it is advisable to soak them for a few minutes rather than leaving them submerged for extended periods. This practice minimizes the risk of any potential leaching of harmful substances, especially if the scrubbers are made from lower-quality silicone.

As for tap water safety, in the United States, municipal water supplies are typically treated to remove contaminants and pathogens, including bacteria like Helicobacter pylori. However, the effectiveness of this treatment can vary based on local water quality and infrastructure. While most tap water is safe for consumption, it is always a good idea to stay informed about your local water quality reports. If you have concerns about specific contaminants, including H. pylori, using a water filter that meets NSF/ANSI standards for microbial reduction can provide an additional layer of safety.

In summary, using 304 stainless steel utensils in cooking is generally safe, provided you follow the recommended guidelines for temperature and food types. Silicone scrubbers can be effective and safe if used correctly, and tap water is typically treated to ensure safety, although local conditions may vary. If you have ongoing concerns about your kitchenware or water quality, consulting with a local health department or a food safety expert can provide further reassurance and guidance.

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