So I’ve been looking at the boxes of my consumer fireworks more carefully and noticed they all have these UN numbers on them. UN0336, UN0337, etc. I know they relate to hazard classification but I’m not sure what the difference is.

My understanding is UN0336 is for 1.4G and UN0337 is for 1.4S? But then I see some boxes with UN0431 or UN0432 and those seem to be for professional/salute stuff.

Can someone explain what each UN number means and why it matters? Also does it affect how I can transport or ship them?

Just trying to understand the labeling better so I know what I’m actually buying.