A good article by By Anne Marie Helmenstine, Ph.D. for About.com Guide on household products that should not be mixed.
| Some of the common chemicals found in your home shouldn't be mixed together. It's one thing to say "don't mix bleach with ammonia", but it's not always easy to know what products contain these two chemicals. Here are some products you may have around the home that shouldn't be combined. I also have a list of dangerous household chemicals that may be helpful. |
The full article can be read here