So would I. Reading the label is required. You can't trademark a number, so anyone can make any product and include "12" in the name.

Intel had the same problem with their processors, and learned their lesson only after the 486 line. Now they all have names, but there are numbers attached, that are supposedly invalid. Good luck with that, is what I say.

The same goes for letters in any language. DEC had a processor popularly called Alpha, but its actual designation was AXP. It was internally called Alpha before it the designation AXP was ever conceived.

The issue with refrigerants is more complex though, since R12 or R134a actually describe chemical properties, so the product developer didn't really assign these at random (as opposed to their trade names, Freon and Suva). Then these shysters come up with these junk products and include 12 in the name, with impunity.