: For liquid nitrogen, check with local cattle farm supply chains or artificial insemination centers ; they often stock it for storing biological samples. Buying Online

To buy pure nitrogen, you can choose between compressed gas cylinders (typical for welding or industrial use) and liquid nitrogen (common for cooling or cryogenics). Where to Buy Locally

Online retailers generally sell smaller, disposable "calibration gas" cylinders or specialized storage equipment like dewars. Most pure nitrogen gas products ship only to verified business addresses due to safety regulations.

: Sells various sizes of 99.999% pure nitrogen calibration gas, ranging from 17-liter disposable cylinders (~$54) to 650-liter refillable options (~$1,349).

: Offers both compressed nitrogen (>99.998% purity) and refrigerated liquid nitrogen.

Local industrial gas suppliers are the most reliable source for both high-pressure gas cylinders and liquid nitrogen refills. They typically offer rental or purchase options for cylinders.

: A major national supplier providing high-pressure gas cylinders, liquid nitrogen cylinders, and bulk delivery.

: Buying liquid nitrogen requires a specialized vacuum-insulated container called a Dewar . Many suppliers will not fill a container that hasn't been recently inspected.