Plastics Identification Guide

Plastic Identification Code

Type of plastic polymer

Common Applications

Safety Information

Polyethylene Terephthalate
(PET, PETE)

Soft drink, water and salad dressing bottles; peanut butter and jam jars, thermoformed sheets, strapping, and polyester fibers.

GOOD: Not known to leach any chemicals that are suspected of causing cancer or disrupting hormones.

High Density Polyethylene
(HDPE)

Milk, juice and water bottles; trash bags, grocery bags, recycling bins, agricultural pipe, and playground equipment.

GOOD: Not known to leach any chemicals that are suspected of causing cancer or disrupting hormones.

Polyvinyl Chloride (PVC)

Juice bottles, cling films, PVC piping, and fencing.

BAD: To soften into its flexible form, manufacturers add “plasticizers” during production. Traces of these chemicals can leach out of PVC when in contact with foods. According to the National Institutes of Health, di-2-ethylhexyl phthalate (DEHP), commonly found in PVC, is a suspected human carcinogen.

Low Density Polyethylene
(LDPE)

Frozen food bags, squeezable bottles, cling films, flexible container lids, 6 pack rings, tubing, and various molded laboratory equipment.

GOOD: Not known to leach any chemicals that are suspected of causing cancer or disrupting hormones.

Polypropylene
(PP)

Reusable microwaveable ware, kitchenware, yogurt containers, margarine tubs, microwaveable disposable take-away containers, disposable cups and plates, and auto parts.

OK: Hazardous during production, but not known to leach any chemicals.

Polystyrene
(PS)

Egg cartons, packing peanuts, disposable cups, plates, cafeteria trays and cutlery, disposable take-away containers, toys, and video cassettes.

BAD: Benzene (material used in production) is a known human carcinogen. Butadiene and styrene (the basic building block of plastic) are suspected carcinogens. Energy intensive and poor recyclability.

Other (often Polycarbonate Acrylic, Acrylonitrile butadiene styrene or ABS, Fiberglass, Nylon, and Polylactic acid)

Beverage bottles, baby milk bottles, electronic casing, eating utensils, microwave ovenware, and plastic coating for metal cans.

BAD: Polycarbonates are made with Bisphenol-A, a chemical invented in the 1930s in search for synthetic estrogens. A hormone disruptor. Simulates the action of estrogen when tested in human breast cancer studies. Can leach into food or beverages as container ages or is heated.


Other plastics in this category are not known to leach any chemicals that are suspected of causing cancer or disrupting hormones.

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