Ivan's weblog

Today I saw a fire extinguisher that had the equivalent of this NFPA diamond:

This is a standard code to tell firefighters about the risks of specific substances. The areas covered are health hazards, flammability, and reactivity.

Now, what is ironic is that, when fighting a fire, the last thing I would worry about is the hazardous (?) substances contained in the fire extinguiser itself (and I would certainly not expect them to be flammable!). But don’t worry, the 1/0/0 diamond above means “may cause irritation", and is the same as the one assigned to substances such as sodium chloride. So, in the end, this is almost like looking at the nutritional information label on a water bottle…

Disclaimer: fire extinguishers can be hardazous if misused–always use the appropriate fire extinguiser according to the fire source and conditions! (And while we are at it, don’t try this at home, eat fruits and vegetables, and talk to your doctor.)