What Is Krypton Gas Used For?

Krypton gas is mainly used for lighting, including halogen bulbs and fluorescent lights. It is also added to double-glazed windows for increased insulation, and its isotopes can be used to diagnose various diseases.

WestAir supplies krypton across California and Arizona.

Lighting Applications

Krypton is commonly used in specialized lighting applications where high performance and longevity matter. When electrically excited, krypton emits a bright bluish-white to green-yellow glow. In practical lighting applications, krypton is used as a fill gas in incandescent and halogen bulbs, allowing filaments to burn hotter and brighter, which makes it valuable for high-intensity lighting systems. And because krypton barely reacts with anything, the lighting hardware lasts longer.

Krypton also shows up in aviation lighting, including airfield and runway systems. Krypton-85 (a radioactive isotope) has been studied specifically for these applications. It’s not the only noble gas that works here, but its brightness and reliability give it an edge in high-performance setups.

Cutting-Edge Laser Solutions

Krypton-based lasers deliver precise, concentrated beams—this is useful for applications like laser light shows and industrial cutting tools.

A Krypton Fluoride (KrF) laser can be used for various purposes, such as:

• Semiconductor production
• Photolithography
• Laser surgery

Window Manufacturing

Krypton gas is about three times heavier than air, making it an exceptional insulator in modern window manufacturing. When sealed between glass panes in double or triple-glazed windows, krypton can provide up to 40% better thermal insulation than standard air-filled windows.

That matters most in extreme climates where temperature control can have a big impact on your energy bill. Buildings with krypton-filled windows typically see significant reductions in heating and cooling costs year-round.

Medical Imaging and Diagnostics

Krypton uses are significantly expanded by its isotopes, which have become valuable tools for diagnostic procedures and research.

For example, krypton-85 is essential for studying blood flow patterns and lung function.

Krypton isotopes are used in various medical imaging applications, primarily for studying pulmonary function and blood flow. That precision helps healthcare providers catch problems earlier and make better treatment calls.

Some isotopes go even further into specialized territory. For example, krypton-81m has been used instead of xenon-133 to evaluate regional lung ventilation in patients. 

Semiconductor Manufacturing

In the semiconductor industry, krypton is sometimes used in the production of 3D NAND flash memory used for solid-state drives (SSDs).

Specifically, manufacturers use krypton in plasma etching processes to improve efficiency and precision in semiconductor fabrication.

Some manufacturers choose krypton over xenon because it is less expensive—while still offering comparable performance in certain manufacturing applications.

Research and Development

Krypton gas is used by scientists and researchers in electromagnetic calorimeter experiments and nuclear fusion research.

This isn’t new territory. The U.S. Naval Research Laboratory started developing electron beam-pumped KrF lasers for inertial fusion power as early as the 1970s.

Further Reading: Is Krypton Flammable?

Nick Vasco

Nick is an experienced B2B writer who brings his skill for crafting clear, easily digestible content to the industrial gas space.