It depends on your local post office and their level of ineptitude.
Example I had to mail eliquid to a few friends a couple weeks ago. The conversation went like this:
me: "I need these 3 packages marked fragile/liquid. They're wrapped in bubblewrap, packing peanuts and this is a weight rated box."
her: What kind of liquids.
me: "E-liquids."
her: "Ew liquids? What are those?"
me: (thinking this will be interesting) "E-liquids, not ew liquids. Food safe flavors in a viscous liquid base of propylene glycol, nicotine, and vegetable glycerin"
her: "I don't think you can mail hazardous substances. Let me get my boss."
me: "oy...ok"
Postmaster: "What are you trying to mail, you can't mail body parts."
me: "Nope no body parts, just e-liquid. You've delivered 30 of these packages to me this year, why are you saying I can't mail them?"
PM: "What's in it? She said you're trying to mail hazardous liquids"
me: Nicotine, propylene glycol, vegetable glycerin and food safe flavorings in glass bottles, wrapped in individual zipper bags, bubble wrap, outer zipper bags, and packing peanuts. Actually those 2 - have nicotine in them, the 3rd one contains just the other 3 ingredients.
PM: "Hmm - none of those things are listed on the hazardous list. Go ahead this time.
me: "so you're telling me you won't let me ship this stuff in the future?"
PM: "What is it used for?"
me: "These liquids are used to refill e-cigarette tanks so that people can quit smoking." (While this has gone on one of the town cops - who vapes comes in to pick up the PD's mail)
Cop: "There's no USPS prohibition on mailing what she's trying to mail, your lack of being informed, doesn't mean she can't mail what you're harassing her about."
me: "To answer the PM again - the ingredients - save for the nicotine are also used in sex lubricants, I can mail those right?"
PM: "uh yep." (to the postal teller) "Just mail it, nothing in it is hazardous, and know that she'll be back in, in a week with more to mail. She's more informed than I am on a lot of regulations, I trust her."
(I've dealt with our post master on lots of weird things, she's right, I know more than she does, and she has a $28.00/hour job, I can't get a job there, likely because I know too much info)
If all else fails - tell your local postal worker that its flavored sex lube. They'll blush and be happy to ship it for you.
Things to know:
a. Flammable liquid means a liquid that has a flashpoint of not more than 141°F (60.5°C), or any material in a liquid phase that has a flashpoint at or above100°F (38°C). (anything that will catch fire, with a spark between 100-141°F.)
b. Combustible liquid means any liquid that does not meet the definition of any other hazard class and has a flashpoint above 141°F (60.5°C) and below 200°F (93°C). (anything that will flash at 141-200 F)
PG's flashpoint is 210.2°F in a closed container (above the limit for prohibited mailings)
VG's flashpoint is 320 F in a closed container (even more well above prohibited mailings)
Nicotine base at 100mg/ml is not flammable or combustible - per wizard labs msds
Most flavors that have ethyl alcohol in their ingredient list - will have a very low flashpoint - but not enough to throw off a high vg mix to being hazardous to ship. I pulled up 2 flavors at random from TFA's MSDS List - absinthe has a 48 F flashpoint; Dairy/Milk has a >200F flashpoint - the former would have to be shipped in straight flavor form - using UPS ground only; the latter is usps priority safe to mail.
Lots of math, chemistry and rules to know, but in our usual diluted portions - its perfectly safe to mail - unless you're mixing in a lot of ethyl alcohol as a diluent.
Hopefully that helps. If you ever need shipping help - for vape gear or other stuff - feel free to pm me and ask for help. I'll give you the info I have, or point you where to ask.
kidding. I can send you money for it via paypal if you like.
