In that it doesn't melt your skin off or melt through protective gear, isn't neon green, isn't stored in silly glass beads, and usually isn't stored in active f

In that it doesn't melt your skin off or melt through protective gear, isn't neon green, isn't stored in silly glass beads, and usually isn't stored in active form at all but rather binary agents that are combined as late as possible. It's nasty stuff no doubt but the movie version that OP recreated is a made up weapon that just happens to use the same name, and they probably recreated it because it's an intentionally cool looking prop, not because they think actual chemical weapons are cool.