Farmers use liquid nitrogen for artificial insemination, so cattle supply chains often carry it.
Some university science departments sell small amounts to the public, often at lower rates than commercial distributors.
Although you do not need a license to buy it, suppliers typically require you to meet specific conditions before they will complete a sale: is it legal to buy liquid nitrogen
Large companies like Airgas and Messer supply gases to both businesses and individuals.
Many local distributors (e.g., welding supply shops) may require you to review safety protocols or sign a liability waiver. Farmers use liquid nitrogen for artificial insemination, so
Local independent welding shops are often the most accessible source for small quantities.
Suppliers will not dispense liquid nitrogen into standard thermoses or unapproved containers. You must provide or purchase a Dewar , a specialized vacuum-insulated flask designed to safely vent gas as the liquid boils. Many local distributors (e
Liquid nitrogen is not typically sold over-the-counter in retail stores. Common sources include: