This tag is for the human health label for the stuff inside the fire extinguisher. This one would be that the chemical is a dust, nuisance, and irritant. It is not flammable or will not react with other chemicals.
First step, break off the tag that keeps the pin in and says that the tank has chemical in it. A fire extinguisher is only good for one use and then it needs to be reserviced.
Pull out the pin so that the handle can be squeezed.
Take off the hose from the clip and it is ready to go.
Dad made a fire in the fire pit for us to practice on. Dancer is spraying it low because the fire doesn't go out unless all the area where there is flame is sprayed with the chemical. I would have thought one puff would have done it but it didn't, the flame came right back up where there was no chemical.