Misc Notes on Plastics,might help when looking for a container,the corresponding number that is represented in the arrowed triangles
# 1 Plastics
PET or PETE (polyethylene terephthalate)
#1 plastic leeches phylates and BPA (Bisphenol A) when exposed to temperatures over 78 degrees.
# 2 Plastics
HDPE (high density polyethylene)
HDPE is a versatile plastic with many uses, especially for packaging. It carries low risk of leaching and is readily recyclable into many goods.
# 3 Plastics
V (Vinyl) or PVC
PVC contains chlorine, so its manufacture can release highly dangerous dioxins. If you must cook with PVC, don't let the plastic touch food. Also never burn PVC, because it releases toxins.
Polyvinyl Chloride PVC is unique because it not only resists water penetration it also resists fire. It is flame resistant because it contains chlorine. When PVC is burned it releases the chlorine atoms and chlorine atoms inhibit combustion.
Organizations including the U.S.-based National Toxicology Program, the Environmental Protection Agency, the International Agency for Research on Cancer and the National Institute of Occupational Safety and Health agree that vinyl is one of only 52 chemicals/compounds designated as a confirmed human carcinogen.
The risk is highest when containers start wearing out, are put through the dishwasher or when they are heated (including microwaved). PVC manufacturing can release highly toxic dioxins into the environment, and the materials can off-gas toxic plasticizers into your home.
# 4 Plastics
LDPE (low density polyethylene)
# 5 Plastics
PP (polypropylene)
Polypropylene has a high melting point, and so is often chosen for containers that must accept hot liquid.
#6 Plastics
PS (polystyrene) STYROFOAM
Polystyrene can be made into rigid or foam products -- in the latter case it is popularly known as the trademark Styrofoam. Evidence suggests polystyrene can leach potential toxins into foods. The material was long on environmentalists' hit lists for dispersing widely across the landscape, and for being notoriously difficult to recycle.
Polystyrene is a concern because the chemical styrene can leach from it into food and beverages. According to the EPA, short-term styrene exposure at levels above the Maximum Contaminant Level (used to set drinking-water standards) can cause nervous-system effects such as loss of concentration, weakness, and nausea. Long-term exposure can cause liver and nerve damage and cancer.
# 7 Plastics
Miscellaneous
A wide variety of plastic resins that don't fit into the previous categories are lumped into number 7. A few are even made from plants (polyactide) and are compostable.
Number 7 Other is the real crime in the plastic industry. Number 7 is made from any combination of any kind of plastic. The manufacturer of this