where can i buy liquid nitrogen

2 min read 16-03-2025

Liquid nitrogen (LN2) is a versatile cryogenic liquid with various applications, from medical procedures to food preservation and industrial processes. But where can you actually buy this fascinating substance? The answer depends on your needs and location. This guide explores your options for purchasing liquid nitrogen.

Understanding Your Liquid Nitrogen Needs

Before diving into where to buy, consider these factors:

Quantity: Do you need a small amount for a single experiment, or large quantities for industrial use? The supplier and purchase method will vary greatly depending on volume.
Purity: The purity level of LN2 impacts its applications. High purity is crucial for medical and scientific uses. Industrial applications may tolerate lower purity levels.
Delivery: Will you pick up the liquid nitrogen yourself, or do you need delivery? Delivery options and costs vary depending on location and quantity.
Frequency of Purchase: Are you a one-time buyer, or will you need regular LN2 deliveries? Establishing a relationship with a supplier is beneficial for repeat purchases.

Where to Buy Liquid Nitrogen

Several avenues exist for purchasing liquid nitrogen, each catering to different needs:

1. Industrial Gas Suppliers

These are your primary source for large-scale LN2 purchases. Companies like Airgas, Praxair (now Linde), and Air Liquide are major players in the industrial gas market. They offer various delivery options, from bulk tanks to smaller dewars, and often provide ongoing maintenance and supply contracts.

Pros: Large quantities, various delivery options, reliable supply.
Cons: Typically higher minimum order quantities, potentially higher costs for smaller amounts.

2. Welding Supply Stores

Many welding supply stores also carry liquid nitrogen, often in smaller quantities suitable for smaller projects or hobbyists. This is a good option if you need a smaller amount and don't require high purity.

Pros: Convenient location for smaller purchases, readily available.
Cons: May not offer the same purity levels as industrial suppliers, limited delivery options.

3. Scientific Supply Companies

If you're conducting scientific experiments or research requiring high-purity LN2, scientific supply companies like Fisher Scientific or VWR are excellent choices. They often offer a wider range of container sizes and purity levels.

Pros: High-purity LN2 available, specialized containers and equipment.
Cons: Higher prices, often require accounts or purchase orders.

4. Online Retailers

While less common for larger quantities, some online retailers sell smaller quantities of liquid nitrogen in specialized dewars. Always carefully check seller reviews and certifications before purchasing online. Exercise extreme caution when handling liquid nitrogen; it's extremely cold and can cause severe injuries.

Pros: Convenience, potentially competitive pricing for smaller quantities.
Cons: Shipping restrictions and potential safety concerns, limited quantity options.

Safety Precautions: Handling Liquid Nitrogen

Liquid nitrogen is extremely cold (-196°C or -321°F). Improper handling can lead to serious injuries, including frostbite and cryogenic burns. Always follow these safety precautions:

Wear appropriate safety gear: This includes gloves, safety glasses, and a lab coat.
Work in a well-ventilated area: Liquid nitrogen can displace oxygen.
Use proper containers: Dewars are designed to minimize LN2 loss and prevent spills.
Never seal LN2 containers: Pressure buildup can cause explosions.
Consult safety data sheets (SDS): These sheets provide detailed information on safe handling and disposal.

Finding a reliable supplier for liquid nitrogen depends on your specific requirements. Carefully weigh your needs against the pros and cons of each option and always prioritize safety when handling this cryogenic liquid. Remember to research local regulations and licensing requirements before purchasing.