'NEW YORK, Sept. 17 --- Greenpeace today released the results of a scientific study showing that toys made of soft polyvinyl chloride (PVC), or vinyl, contain toxic chemicals that can leach when chewed or sucked on by children.
The tests were conducted on 63 PVC toys from the United States and 16 other countries, which are designed to be put in young childrens' mouths, such as teething rings. All of the toys contained between 10 and 40 percent by weight of toxic chemical additives used to make the toys soft and flexible. These softeners belong to a group of chemicals called phthalates and are known to leak from PVC products during use, especially when pressure is applied, such as when a small child sucks or chews on a PVC teething ring.
The dominant chemical found in the tested toys is toxic when ingested by animals, with health effects ranging from tumors and liver and kidney damage to reproductive abnormalities. Several of the softeners have been identified as possessing the ability to disrupt the hormone system, a phenomenon known as endocrine disruption. '
http://www.birdsnways.com/wisdom/ww18eiv.htm
I read this today whilst researching PVC piping, its insane! As you can read its saying the soft teething rings contain traces of lead and over harmful chemicals. on a baby teething ring! I gave my parrot some soft teething keys which I have imediately removed, you would think baby things would be safe!if you visit the website it lists toys that contain chemicals, but don't panic the harder PVC seem to be fine!