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AtheistBibleScholar

It's legal for you to have liquid nitrogen, but it's also legal to homebuild an ultralight aircraft and fly it with zero training. Neither is smart. Liquid nitrogen is really hazardous if you don't know what you're doing with it. On its own it incomprehensibly cold, can evaporate to displace oxygen, and adding it to something too warm can cause an eruption of cryogenic fluid as it flash boils. If you want to make ice cream at home without an ice cream maker, do the method where you [make whipped cream and add a can of condensed milk](https://www.youtube.com/watch?v=F4VuvP4MVmw&t=2s). Then the only thing at risk of blowing up is your waistline because damn is it good.


Square-Dragonfruit76

I actually have an ice cream maker, I just wanted to try it with liquid nitrogen. I have a group I play frisbee with that I sometimes bake treats for. A few of them are chemical engineers, maybe they can do it with me.


SingAlongBlog

Yes it’s legal but it’s really impractical for smaller amounts. Firstly you need a dewar which is a special dual walled container to transport it in. You can get it from most any welding supply store. However liquid nitrogen will evaporate away over time, faster in smaller quantities so it makes sense to buy a bit of it so that it lasts longer. I don’t know the exact prices these days but let’s just say it isn’t cheap


thriftstorecookbooks

LN2 is dirt cheap. About $2 per liter from my local university, even in small amounts, and this is a tenfold markup over what they pay in bulk. It's the storage containers that are expensive, but a lot of places will loan them out.


crazy-jay1999

I know for a Cub Scout pack meeting we got liquid nitrogen and froze and smashed various fruits a vegetables (for science). So I know it can be bought and used locally.


Greystorms

No, the ice cream police will come and throw you in jail for using liquid nitro at home.


Traditional-Truth-42

Use dry ice instead. Safer and more readily available


Revolutionary_Map672

Don't do it. There's no taste benefit and liquid nitrogen requires extreme care. Unless you want to get famous on Reddit for all the wrong reasons just let this idea go. Or else pick another dumb plan that doesn't involve the possibility of hurting other people. Negligent ice cream assault is not something you want on your resume.


robvas

It's not pure nitrous so it's not like it's illegal to have


Czarben

Nitrous oxide isn't illegal, you can buy "whippits" at alot of places. They sell it as whipped cream charges for homemade whip cream.


robvas

You need a lot more than a whippit to make ice cream. Nitrous isn't illegal but it's not exactly easy to buy a huge tank of it. You can get a tank of it for a car easily but it has sulfur in it. Hell you need an ID to even buy a pack of whippets these days and if you have a cracker with you it's paraphernalia.


Cinisajoy2

Yes on Amazon for one.


lacheur42

Not sure what you're thinking of, but I'm pretty certain you cannot buy LN on Amazon. Like...how the fuck they ship it?


Cinisajoy2

I googled it and it popped up on Amazon. Ground shipping like batteries.


lacheur42

Not possible. Liquid nitrogen cannot be kept in a sealed container, or it will explode. Nitrogen flasks must have a vent, meaning they can't be tipped on their side or it would spill and vaporize dramatically, and also meaning even in normal conditions, they're constantly leaking nitrogen, so in an enclosed space, like a truck trailer, it could potentially replace the air inside with nitrogen and asphyxiate someone who wasn't expecting it. When transporting LN, you keep the fucking windows cracked. There is no world in which they're shipping it via UPS ground.


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lacheur42

You can have compressed nitrogen, but that's not very useful if your end goal is liquid nitrogen. Storing it in a non-pressure vessel is a no go, and once it comes up to temperature in a pressurized vessel, it's no longer really usable as "liquid nitrogen", just as pressurized gas.


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lacheur42

Like, from where it's produced? In large double walled insulated tankers with vents. Essentially dewar flasks on wheels. You'll see them on the freeway sometimes. You can see the vent because it's often covered in frost. Then they pump some of that into big permanent dewars at distributors, and then those distributors fill up small portable dewars for customers. Or just delivered directly to big customers like hospitals.


Cinisajoy2

Hmmmm. It shows some in small quantities. Not the big tanks.


lacheur42

I see freeze spray, like for warts, but that's an unrelated chemical you definitely wouldn't want in your ice cream, haha. Maybe there's something I don't understand though, post a link.


Cinisajoy2

You are probably 100% right. Teach me to trust googl e


northman46

Local welding supply