NEVER use Easy Off Oven Cleaner on your pipes! It may look great now but the stuff "keeps on ticking" and working the chrome till months later start to bubble from the inside out. :newsmile040:
What's in "Easy Off":
What's Inside: Foamalicious, Vaporlicious Easy-Off Oven Cleaner
The butane, sodium hydroxide, monoethanolimine and diethanolamine I would not worry about so much. Aside from butane, they are all "basic" (high pH) and would not cause as much corrosive issues with metal, unlike an acid and anything with iron. They all will feel "soapy" if you get them on your skin, well, because they are turning the fats in you skin into soap.
Diethylene Glycol Monobutyl Ether: pay attention to this one. Again as a component of brake fluid and we all know that can be nasty stuff. Also, remember that ethylene glycol is used in engine coolant, so this stuff is similar (sweet taste, lowers boiling points other solvents, viscous), but it is in relatively small amounts compared to the other constituents of the can.
Sometimes you have to use what you need to, but be sure to use plenty of water afterwards. What I would suggest is rinsing the area with water, then misting some 50/50 vineagar and water from a spritzer bottle and then more water. The acid will cancel all the basic stuff and it will help break up the glycol as a rinse agent. My chemistry isn't that strong to know the reactions involved, but if somthing is going to potentially "de-bond" chome plating, it needs to attack the metal underneath (at typical "room" temperatures that we live in). If Diethylene Glycol Monobutyl Ether gets to the iron under the chrome through micro scratches OR it is left on when the pipe gets really hot: problem.