3: Can cause serious or permanent injury.
4: Will vaporize and readily burn at normal temperatures.
1: Normally stable. High temperatures make unstable.
~~W~~: Reacts violently or explosively with water.
I mentioned nothing of lithium batteries. I simple noted factual information in relation to the Hazardous material signage. Why do you bring up the idea of lithium batteries? Your propagating the very slide you appear to be frustrated about.