I work with a lab occasionally and get asked often if a chemical is safe to breathe, how hazardous is it if it lands on skin, etc. For the most part, I'll try to go to an SDS and look it up. The pictograms and diamond are what I search for, so I try to give a general answer based on that. I'm never entirely confident in what I suggest, though.
We had a lab supervisor who could tell us something like, "You don't want that on your skin for a long time, but if it falls on you, don't worry about it too much, just wash your hands thoroughly when you can." I'd like to be able to give answers like that without going over the top.
Do you have any suggestions, or could you point me to some other sources that go more in depth?