Where to Buy Liquid Nitrogen: A Simple Buying Guide

Quick summary: Liquid nitrogen (LN₂) is sold by major industrial gas companies like Airgas, Linde, Air Products, and Matheson, as well as by local welding supply stores and specialty science retailers. Most sellers require you to bring your own approved container (called a dewar), and some ask for proof of safe handling knowledge before they'll sell to you. This guide explains where to find liquid nitrogen, what to expect when buying it, and the safety rules you need to know before handling it.

What Is Liquid Nitrogen, and Why Do People Buy It?

Liquid nitrogen is nitrogen gas that has been cooled down to about -196°C (-321°F), turning it into a liquid. It's colorless, odorless, and once it's stored in a proper container, it stays extremely cold for hours or even days.

People buy liquid nitrogen for many reasons, including:

• Cryotherapy and skincare — removing warts or skin lesions
• Food and beverage — making instant ice cream, flash-freezing food, or creating fog effects for drinks
• Science and education — classroom demonstrations, freezing experiments
• Cryopreservation — storing biological samples, sperm, or embryos
• Industrial use — cooling equipment, shrink-fitting metal parts, or removing rust
• Pest control — freezing out bee hives or rodent nests in hard-to-reach areas

Because it's used for so many different purposes, the "right" place to buy it depends heavily on how much you need and what you're using it for.

Where to Buy Liquid Nitrogen

1. Major Industrial Gas Suppliers

The large majority of liquid nitrogen in the United States comes from a handful of major producers, who sell both directly and through branch locations:

• Airgas (an Air Liquide company) — the largest packaged-gas distributor in the U.S., with more than 1,100 locations nationwide.
• Linde — the world's largest industrial gas company, with a coast-to-coast network of branches.
• Air Products — offers bulk and "microbulk" delivery services for smaller regular users.
• Matheson — operates numerous air separation plants and delivers nationwide.
• Messer Americas — supplies liquid nitrogen across the U.S. with over a century in the industry.

These companies mainly serve businesses, labs, hospitals, and schools, but many local branches will also sell smaller quantities to individuals who show up with an approved container. It's best to call ahead, since policies vary by branch.

2. Local Welding Supply Stores

Independent welding and gas supply shops often carry liquid nitrogen or can order it for you. These smaller, local stores are frequently easier to deal with for one-time or small purchases than a large national supplier's corporate account system. A quick search for "welding supply near me" or "industrial gas near me" is often the fastest way to find one.

3. Specialty and Science Retailers

Some laboratory and science-education suppliers sell smaller quantities of liquid nitrogen, sometimes packaged specifically for classroom demonstrations or hobbyist use. These are a good fit if you only need a small amount for a one-time project rather than a recurring supply.

4. Local Ice Cream Shops, Cryotherapy Spas, or Universities

If you only need a small amount for something like a science fair project or a special event, it's worth calling:

• A local university chemistry or physics department
• A cryotherapy or wellness spa
• A nitrogen ice cream shop

Some may be willing to sell or give you a small amount, even if they aren't a formal gas supplier. This isn't guaranteed, but it's a common workaround for very small one-time needs.

5. Hospitals and Medical Gas Distributors

For cryopreservation-grade or medical-grade nitrogen, distributors like Airgas Healthcare supply hospitals and clinics directly. This channel typically requires a medical gas license or an equivalent professional account, so it isn't a practical option for personal or small business use.

What You'll Need Before You Can Buy It

Because liquid nitrogen is classified as a hazardous material, most suppliers won't just hand it over the counter. Be ready to provide:

1. An approved container. Liquid nitrogen must be stored in a vented, insulated container called a dewar. You cannot store it in a sealed container of any kind — pressure builds up as it evaporates, and a sealed container can rupture or explode.
2. Proof of appropriate use, in some cases. Depending on the supplier and local regulations, you may need to explain what you're using it for, especially for larger quantities.
3. Payment and, sometimes, an account. Larger suppliers often prefer setting up a business account, though many local branches will do a one-time cash or card sale for walk-in customers.

If you don't already own a dewar, most of the suppliers listed above also sell or rent them.

How Much Does Liquid Nitrogen Cost?

Pricing varies by region and quantity, but liquid nitrogen itself is relatively inexpensive — it's the container, delivery, and any rental fees that usually make up most of the cost for small buyers. Prices are typically quoted per liter or per gallon, and buying in bulk brings the per-unit cost down significantly. Because pricing differs so much by location and supplier, it's best to call a couple of local options and compare quotes directly rather than relying on a single published price.

Safety: What You Must Know Before Handling Liquid Nitrogen

Liquid nitrogen is not flammable and not toxic, but it is genuinely dangerous if handled carelessly. According to OSHA safety guidance, liquid nitrogen presents two main hazards: extreme cold and oxygen displacement, and general precautions include avoiding eye or skin contact and never handling it with bare hands [1].

1. Frostbite and Cold Burns

Direct skin or eye contact with liquid nitrogen can cause frostbite almost instantly. Always use insulated cryogenic gloves and a face shield or safety goggles when handling it, and never touch surfaces that have been in contact with it.

2. Asphyxiation Risk

This is the most serious hazard, and it's easy to underestimate because liquid nitrogen has no smell or color. As it warms up, one liter of liquid nitrogen expands to roughly 700 liters of nitrogen gas. In a small or poorly ventilated space, this can push out enough oxygen to cause dizziness, unconsciousness, or death — often without any warning signs, since the body doesn't reliably sense low oxygen the way it senses smoke or heat.

A 2021 accident at a Georgia poultry plant illustrates just how serious this risk is: a freezer malfunction released liquid nitrogen into a work area, and six workers died from oxygen displacement in the room. The incident led federal investigators to call for stronger national safety standards specifically addressing liquid nitrogen handling [3].

Always use liquid nitrogen in a well-ventilated space, and never in a closet, walk-in cooler, elevator, or other small enclosed room.

3. Pressure Buildup and Explosion Risk

Never store liquid nitrogen in a sealed, airtight container. As it evaporates, the pressure inside a sealed container can build to the point of rupture or explosion. Only use containers specifically designed for cryogenic liquids, which include proper venting.

4. Material Damage

Materials like rubber, plastic, and some metals can become brittle and shatter after contact with liquid nitrogen. Keep this in mind when choosing what container or tools to use around it.

Basic Safety Checklist for First-Time Buyers

• Use only a proper vented dewar — never a sealed bottle, thermos, or jar
• Wear cryogenic gloves and a face shield when transferring or handling it
• Only use it in open or well-ventilated areas
• Never transport it in a closed vehicle cabin with passengers — use a trunk or cargo area with ventilation, or a well-ventilated van
• Never place it in a passenger elevator with people; send it alone if you must use an elevator
• Keep it away from children and pets
• Read the Safety Data Sheet (SDS) provided by your supplier before your first use

Frequently Asked Questions

Can I buy liquid nitrogen without a business account?

Often, yes, especially from local welding supply shops or branch locations of larger suppliers. Policies vary, so it's worth calling ahead to ask about walk-in or one-time purchases.

Do I need a special license to buy liquid nitrogen?

For general industrial or personal use, typically no. Medical-grade liquid nitrogen sold through healthcare distributors is the exception, since it usually requires a medical gas license.

Can I store liquid nitrogen at home? Small amounts can be stored short-term in a proper dewar in a well-ventilated space, such as a garage with the door open. It should never be stored in a sealed container or in a small, enclosed room like a closet.

How long does liquid nitrogen last once purchased?

This depends on the container. A well-insulated dewar can hold liquid nitrogen for days to weeks, though some of it will slowly evaporate over time even in a good container. This evaporation is normal and is part of why sealed storage is dangerous.

Is it dangerous to swallow or ingest liquid nitrogen?

Yes, and this should never be attempted. There have been documented cases of severe internal injury from swallowing liquid nitrogen, including in novelty food and drink contexts. It should never be added directly to food or drinks meant for immediate consumption.

Conclusion

Buying liquid nitrogen is usually straightforward — major suppliers like Airgas, Linde, Air Products, and Matheson cover most of the country, and local welding supply shops often fill in the gaps for smaller or one-time purchases. The real work isn't finding a seller; it's handling the product safely once you have it. Because liquid nitrogen has no smell, no color, and can silently displace oxygen in an enclosed space, most serious accidents come from simple mistakes: poor ventilation, sealed storage containers, or skipping proper protective gear. If you follow basic safety steps — a vented container, good ventilation, and the right protective equipment — liquid nitrogen is a manageable and useful tool for a wide range of everyday and professional applications.

References

1. Occupational Safety and Health Administration (OSHA). Laboratory Safety Cryogens and Dry Ice — QuickFacts. https://www.osha.gov/sites/default/files/publications/OSHAQUICKFACTS-LAB-SAFETY-CRYOGENS-DRYICE.pdf
2. Washington State Department of Labor & Industries. Dry Ice and Liquid Nitrogen Can Cause Injuries or Death — Hazard Alert. https://lni.wa.gov/safety-health/preventing-injuries-illnesses/hazardalerts/DryIceAndLiqudNitrogen.pdf
3. Safety+Health Magazine (National Safety Council). Safety Board Calls for an OSHA Standard on Liquid Nitrogen , reporting on the U.S. Chemical Safety Board's investigation of the January 2021 Foundation Food Group incident. https://www.safetyandhealthmagazine.com/24986-safety-board-calls-for-an-osha-standard-on-liquid-nitrogen/
4. Airgas (an Air Liquide company). Nitrogen Gas & Liquid Nitrogen — Find a Branch or Buy Online. https://www.airgas.com/industrial-gases/nitrogen
5. Linde plc. Nitrogen — Gases and Equipment. https://www.lindeus.com/what-we-offer/gases/nitrogent