All of my chemicals I bought from Photographer's Formulary came either in heat sealed small pouch (that sometimes leaked) or in a plastic bottle and taped up seam. I would NOT try to take these on an airline... All it takes is someone to question something and there's no way for me to prove anything. A small leak can cause a big panic too.

From security personnel's stand point, there is no guarantee what's on the label is what's inside the bottle. They won't know the company, chemical, or its purpose. It's not like a ruggedly sealed foil package of D76 with big KODAK name on it (which everyone knows). We are in a climate someone will flip out because your shampoo bottle is too large and these are chemicals that are unknown to common people.

I would just ship it. Not worth the hassle and potential loss or worse.