Safer choices are coded 1, 2, 4 and 5.
Avoid 3, 6 and most plastics labeled 7.
Here’s what you should know about each code:
CODE 1: PET OR PETE (NYLON)
Qualities: Thin, clear
Common usage: Bottles for water, cooking oil, peanut butter, soda
Studies indicate that this plastic is safe for one-time use. As a precaution, however, these bottles should not be reused or heated. This plastic can be recycled once into new secondary products such as fabric, carpet or plastic lumber.
CODE 2: HDPE (HIGH-DENSITY POLYETHYLENE)
Qualities: Thick, opaque
Common usage: Milk and water jugs, juice bottles, containers for detergent, shampoo and motor oil, and toys
Limit how often you refill containers made of HDPE. It can be recycled one time into products similar to those made of recycled Code 1 plastic.
CODE 3: PVC (POLYVINYL CHLORIDE)
Qualities: May be rigid or flexible
Common usage: Bibs, mattress covers and commercial-grade plastic wrap, as well as a few types of food and detergent containers
Avoid it. The manufacture of PVC creates dioxin, a potent carcinogen that contaminates humans, animals and the environment. PVC may also contain phthalates to soften it. These hormone disrupting chemicals have been linked to male reproductive problems and birth defects. PVC is not easily recycled, but some recycling plants may accept it. More from http://www.nblinhua.com/.