OK, guys, gather round... As someone who works with dangerous chemicals on a daily basis, let me explain this to you.
Do NOT waste time trying to figure out if the chemical is acid or base (caustic). Get to running water, and rinse, rinse, rinse. After that, rinse some more.
If someone gets acid (or whatever) in his eyes, he may have to be held down to rinse his eyes. The eyelids must be pryed open and the eyes rinsed well. Do not use forcefully squirting water from a nozzle, a gentle running water flow is fine. But rinse.
Remove any contaminated clothing. I don't care if you are in the middle of downtown, strip it off. RINSE.
Oh, and rinse some more.
Now you can worry about medical help. If you wait, you risk more damage.
Safety glasses at a minimum for many activities. If you KNOW you are to be working with dangerous liquids, goggles and/or face shield are indicated. Rubber apron, slicker suit, long rubber gloves, rubber boots may also be indicated, as the job requires.
Do not even crack the cap on liquid chemicals until you have located a method of washing (eye wash, shower, garden hose, sink, gallon jug of water, something).
No, I am not being alarmist, or overly dramatic. I mean it. Do it.
OK, now you can go back to whatever you were doing before.