Omar Khalid
Food-grade plastic is a type of plastic that is suitable for coming into contact with food and beverages. It is deemed non-toxic and safe for food interaction, but it is important to note that not all food-grade plastics are automatically considered food-safe. Food-grade plastic is manufactured to meet stringent safety and quality standards, ensuring it does not contain any hazardous substances or materials that could pose a risk to human health. To identify food-grade plastic, look for recycling symbols with numbers 1, 2, 4, and 5, which are generally considered safe. These symbols indicate the type of plastic and its suitability for food contact. It's important to be aware of the potential health risks associated with certain chemicals in plastics, such as BPA and phthalates, which can disrupt hormones and create serious health risks.
| Characteristics | Values |
|---|---|
| Plastic type | Polyethylene Terephthalate (PET or PETE), High-Density Polyethylene (HDPE), Polyvinyl Chloride (PVC), Polypropylene (PP), Polycarbonate |
| Recycling codes | 1, 2, 4, 5 (generally safe); avoid 3 and 7 if seeking BPA-free plastics |
| Safety | Food-grade plastic is deemed non-toxic and suitable for food interaction, but may not be safe for all uses (e.g. heat may cause chemical breakdown and release of toxins) |
| Toxin prevention | Chemical-resistant, tough materials are used to prevent toxins from leaching into food |
| FDA approval | Food-grade plastics are reviewed and studied by the FDA's Division of Food Contact Notifications, which includes scientists, chemists, and toxicologists |
| BPA | Bisphenol A (BPA) is a chemical found in some plastics that may have adverse health effects; it is still authorised for use by the FDA |
| Practicality | Food-grade plastics are designed to be easily cleaned and resistant to staining and odours |
| Intended use | Food-grade plastic must be used for its intended purpose to be considered food-safe (e.g. dry food storage vs. hot food storage) |
| Heavy metals | Food-grade plastics do not contain heavy metals |
| Dyes and additives | Food-grade plastics do not contain dyes or additives |
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What You'll Learn
Check the recycling codes on the bottom of containers
One of the most reliable ways to determine if a plastic container is food grade is to check the recycling codes on the bottom. The universal recycling symbol is a triangle made up of three arrows, with a number inside. Food-safe plastics are typically numbered 1, 2, 4, or 5.
Number 1 plastics include Polyethylene Terephthalate (PET) items, which are safe for one-time usage only. They become unsafe and leak toxins if reused or stored in the sun. Number 2 plastics are High-Density Polyethylene (HDPE), a robust and versatile plastic extensively used in food packaging. Number 4 plastics are Low-Density Polyethylene (LDPE), used for food items such as bread bags, frozen food bags, and squeezable bottles for mustard and honey. Number 5 plastics are Polypropylene (PP), commonly used for containers that hold ketchup, syrup, and yogurt.
Other recycling symbols to look out for are numbers 3 and 7, which may contain Bisphenol A (BPA), an industrial chemical that can seep into food and beverages, potentially causing damaging health effects.
In addition to checking the recycling codes, look for explicit ""food grade" or "food safe" labelling on the container or its packaging. Many food-grade containers will also display a cup and fork symbol to indicate they are safe for food contact.
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Avoid plastics with BPA
When it comes to food storage, it is important to identify food-grade plastic and understand how to avoid plastics with BPA. Food-grade plastic is considered anything that is safe to consume or come into direct contact with food. It is important to note that not all food-grade materials are food-safe. Food-safe materials are those that are used according to their intended purpose. For example, a plastic container meant for dry cereal may not be safe for storing hot soup, as heat can break down the chemical bonds in the plastic, causing toxins to contaminate the food.
To avoid plastics with BPA, there are several measures you can take:
- Avoid plastics with recycling symbols 3 and 7, as these may contain BPA. If there is a leaf symbol next to these numbers, it indicates that the plastic is BPA-free.
- Do not heat food in plastic containers, as heat can cause chemicals to seep into your food. Instead, use glass or metal containers.
- Choose products that are marked "BPA-free".
- Avoid handling receipts printed on thermal paper, as they often contain BPA, which can transfer to your hands and body.
- Reduce your consumption of canned food and plastic water bottles, as these often contain BPA. Opt for fresh or frozen produce and use reusable stainless steel, glass, or ceramic bottles for water.
- Avoid plastic or coated roasting and steaming bags, as well as plastic water bottles with resin recycling code 1.
- Be cautious when using other consumer items and look out for Prop 65 warnings, which indicate the presence of BPA and/or other hazardous chemicals.
By following these guidelines, you can minimize your exposure to BPA and its potential health risks, especially for pregnant individuals, unborn babies, infants, and children.
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Look for FDA-approved plastics
When it comes to food safety, it's essential to understand the difference between "food-safe" and "food-grade" materials. Every food-safe material is food-grade, but not every food-grade material is food-safe. Food-grade materials are those that are okay to either consume or come into direct contact with food. However, they are only considered food-safe if they are used as intended. For example, a plastic container meant for dry food may not be safe for storing hot liquids.
The Food and Drug Administration (FDA) plays a crucial role in ensuring the safety of food production, storage, and packaging. They set stringent guidelines and standards for consumable items, preparation equipment, and packaging materials, including plastic. To be "FDA compliant" or "FDA-approved," a material must meet all the FDA's guidelines for safe, direct contact with food. This includes being able to withstand the environment it will be used in, such as high temperatures.
When selecting plastics for food contact, it's important to consider the potential presence of BPAs or Bisphenol A, an industrial chemical that may seep into food and beverages. While the FDA continues to authorize the use of BPA, concerns have been raised about its potential health effects. To avoid BPAs, look for plastics with recycling symbols other than 3 and 7, as those items may contain the chemical.
Some common FDA-approved plastics for food contact include:
- HDPE (High-Density Polyethylene): Marked with the recycling triangle number 2, HDPE is known for its strength, durability, and resistance to chemicals and moisture. It is commonly used for milk jugs, water bottles, and food packaging.
- LDPE: LDPE is similar to HDPE but less rigid, making it suitable for squeeze bottles and plastic film. It is chemically resistant and does not leach harmful toxins when storing food at various temperatures.
- PET or PETE (Polyethylene Terephthalate): Designated by the recycling triangle number 1, PET is widely used for packaging water and soft drinks due to its strength, lightweight, and transparent nature. It also has excellent barrier properties that protect food from oxygen and moisture.
- PP (Polypropylene): PP is safe for microwave use and is commonly used for medication bottles, dairy containers, and food storage boxes. It has high heat tolerance, ensuring it will not leak toxins when breaking down.
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Understand the difference between food-grade and food-safe
Plastic is widely used for storing food, but some plastics contain harmful chemicals, such as BPAs, which are unsafe for human consumption. This has led to concerns about which plastics are safe for storing food.
Food-grade plastic is any plastic material deemed safe for use with foods. It must meet strict requirements and is regulated by higher standards than plastic used for other purposes. Food-grade plastic must be produced using safe materials in a safe environment. It must be protective, durable, and chemically safe. It must not contain dyes, additives, or harmful products.
Food-safe plastic, on the other hand, is a type of food-grade plastic that is utilized per its intended purpose to prevent safety hazards. For example, a plastic container manufactured for dry cereal may not be safe for storing hot soup, as heat can break down the chemical bonds of the plastic, causing toxins to contaminate the food.
To identify food-grade plastic, look for the recycling codes embossed on the bottom of plastic containers. These range from 1 to 7, with 2, 4, and 5 being the safest for food storage. Examples of food-grade plastics include PET or PETE (recycling number 1), HDPE (number 2), PVC (number 3), LDPE (number 4), PP (number 6), and bioplastics (number 7).
While food-grade plastic is safe for direct contact with food, it is important to note that not all food-grade plastic is food-safe. It is crucial to use these plastics according to their intended purposes to ensure food safety.
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Choose plastics with high heat tolerance
When selecting plastics for food storage, it is essential to choose those with high heat tolerance to prevent chemical leaching. Some plastics have higher heat resistance than others, making them safer for storing hot foods and beverages. Here are some key considerations when choosing plastics with high heat tolerance:
First, look for plastics with a high melting point. Polypropylene (PP) has a high melting point, typically ranging from 160°C to 170°C. This makes it less likely to melt or break down when exposed to high temperatures, reducing the risk of toxic chemical leaching. PP plastic is ranked 5 on the recycling number chart and is considered safe for food storage. It is often used for medication bottles, dairy containers, and food storage boxes.
Secondly, consider the intended use of the plastic. Even if a plastic is generally safe for food use, it may not be suitable for all types of food. For example, a plastic container designed for dry foods like cereal may not be safe for storing hot liquids like soup. Heat can break down the chemical bonds in some plastics, causing toxins to contaminate the food. Therefore, it is crucial to match the plastic to its intended use.
Additionally, opt for plastics with high thermal resistance. Polycarbonate (PC) plastics are known for their excellent heat resistance, making them suitable for hot applications. They are FDA-compliant for food storage and are often used in applications where glass or other materials would be traditionally used. PC plastics are strong, durable, and impact-resistant, making them a safe choice for food storage.
Another plastic with high heat tolerance is High-Density Polyethylene (HDPE), which has a wide temperature range. It is considered safe for short periods at temperatures up to 248°F (120°C) and for long periods up to 230°F (110°C). HDPE is marked with the recycling triangle number 2 and is commonly used for milk jugs, water bottles, and food packaging. It has high chemical resistance and is unaffected by food acids, making it a popular choice for food applications.
When choosing plastics with high heat tolerance, it is also important to consider the potential presence of harmful chemicals like Bisphenol A (BPA). While BPA is still authorised by the FDA at low levels, new studies suggest that it may be more detrimental to health than previously believed. To avoid BPA, stay away from plastics with recycling symbols 3 and 7, as these may contain the chemical.
In summary, selecting plastics with high heat tolerance involves choosing those with high melting points, matching the plastic to its intended use, and opting for materials with excellent thermal resistance. Always check the recycling numbers on the bottom of containers to ensure they are safe for food storage and avoid potential toxin ingestion.
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