Who has inernet access all over the place.
I have a book: I believe it is titled "Haz Mat".
It gives the codes and a whole bunch of other info like the evacuation distance, and in some cases emergency treatment if exposed, and such. Standard in every police officer's case... Also for Dispatchers like me.
And in a genuine emergency I know who to call too. (Hint.. My office, 9-1-1)