No, I'm a girl - buy first, think later!
I've done a quick search on google and found a relatively extensive list of prohibited/questionable items but can't see any reference to HFCs. Seems like most stuff inc various weapons can go in the checked in luggage. I'll declare it to the people on the luggage desk and they can check them if they want. Must remember to have the dirty knickers bag in the other case
silver tabbies
it's ok Vik. I was starting to get paranoid in case there's various 'hot words' in this thread that might attract the attention of the US secret service. And thanks to your input I'm sure of it now
S.
I've hand carried oil field equipment many times on planes (mostly had to check it though) including electronic panels, gauges, funny looking specialist tools and other very dodgy looking stuff including stuff for a TCP perforated well (covered in explosives residue) and had no issues.