Xenon (Xe) is a colorless, odorless, non-flammable and chemically inert noble gas with atomic number 54. It is one of the rarest gases recovered commercially — occurring in the atmosphere at only about 0.087 ppm by volume — yet it underpins a remarkable range of high-value technologies: semiconductor photolithography, HID lighting, satellite ion propulsion and medical imaging. This reference summarizes verified physical and chemical properties, industrial applications, purity grades, production, market context and safe handling of xenon, drawing on gas-safety data, producer specifications and 2025–2026 market research.
Identification & Key Specifications
| Property | Value |
|---|---|
| Chemical name | Xenon |
| Symbol / formula | Xe (monatomic) |
| Synonyms | Xe |
| Atomic number | 54 |
| Group | 18 (noble gas) |
| CAS Number | 7440-63-3 |
| UN Number | 2036 |
| EINECS Number | 231-172-7 |
| Molecular weight | 131.29 g/mol |
| DOT Hazard Class | 2.2 (Non-flammable gas) |
| Atmospheric abundance | ≈ 0.087 ppmv |
Physical & Chemical Properties
| Property | Typical value |
|---|---|
| Appearance | Colorless, odorless gas |
| Boiling point | ≈ -108.1 °C |
| Melting point | ≈ -111.8 °C |
| Density | ≈ 4.8 × air (≈ 5.9 kg/m³ at STP) |
| Odor | Odorless |
| Flammability | Non-flammable |
| Toxicity | Non-toxic; simple asphyxiant at high concentration |
| Chemical nature | Noble gas, monatomic, inert under normal conditions |
| Reactivity | Forms compounds with F/O only under extreme conditions (e.g., XeF₂) |
| Greenhouse / ozone effect | Not a greenhouse gas; not covered by F-gas regulation |
What Is Xenon Used For?
Xenon combines inertness, high atomic mass and a bright, white-blue emission spectrum, making it valuable where performance and purity matter:
- Lighting (HID & specialty lamps) — xenon short-arc lamps for cinema projection, xenon flash tubes in photography, and specialty automotive HID headlamps that produce intense daylight-like white light.
- Semiconductor manufacturing — excimer lasers (e.g., KrF, ArF mixtures containing xenon) for photolithography, and xenon difluoride (XeF₂) for selective silicon etching in advanced nodes.
- Aerospace ion propulsion — the propellant of choice for electric thrusters (ion and Hall-effect) on satellites and deep-space probes, thanks to its high atomic mass and low ionization energy.
- Medical — anesthetic gas (where approved), and imaging/contrast and neuroprotection research, including emerging studies on neurodegenerative disease.
- Scientific research & calibration — NMR spectroscopy, proportional counters/radiation detectors, calibration gas standards and quantum-computing/atomic-clock cooling media.
Xenon in Semiconductors and Advanced Manufacturing
In semiconductor fabs, xenon enables two critical steps. First, it is a component of excimer laser gas mixtures used in deep-ultraviolet (DUV) photolithography, which patterns the finest features on advanced logic and memory wafers. Second, xenon difluoride (XeF₂) is used as a selective, isotropic etchant for silicon in MEMS and advanced packaging. Because advanced nodes demand ever-tighter impurity control, fabs increasingly specify N5 (99.999%) and higher xenon, and some leading-edge processes move toward 99.9999% grades.
Purity Grades
| Grade | Purity | Typical use |
|---|---|---|
| N4.5 | 99.995% | General lighting, flashlamps, industrial use |
| N5 (Electronic / high-purity) | 99.999% | Semiconductor photolithography, excimer lasers, medical imaging |
| 6N (Ultra-high purity) | 99.9999% | Advanced lithography, high-end research |
Production & Supply
Xenon is obtained as a by-product of air separation units (ASUs) that produce oxygen and nitrogen, then purified by cryogenic distillation. Because atmospheric abundance is only about 0.087 ppmv and recovery scales with overall industrial gas output, xenon supply is inherently limited and can be cyclical. This scarcity — not toxicity or regulation — is the main reason xenon commands a premium price and why reliable, certified supply matters for buyers in semiconductors, aerospace and medical fields.
Market Overview (2025–2034)
Third-party market research (2025–2026) sizes the global xenon gas market at roughly USD 260–300 million in 2025, with estimates ranging to about USD 320–470 million by 2034 at a CAGR of about 2–5% depending on the source and scope. Estimates vary, but the findings consistently show:
- Asia Pacific dominates with a roughly 35–37% share in 2025, led by China, Japan, South Korea and India (satellites, electronics, semiconductors).
- N5 (99.999%) grade holds the largest purity-segment share, driven by imaging, lighting, medical and satellite demand.
- Growth drivers: AI and 5G chip expansion, satellite mega-constellations using ion propulsion, medical imaging/anesthesia, HID lighting and nuclear/quantum research.
- Major suppliers include Linde, Air Liquide, Air Products, Taiyo Nippon Sanso, Messer, Iceblick, Praxair (Linde), and regional rare-gas specialists.
Packaging & Supply
For industrial supply, xenon is shipped as a compressed gas in seamless steel cylinders. Common configurations include 8 L to 50 L cylinders, with fill volumes around 1,200–1,300 L per 8 L cylinder and up to about 10 m³ per 50 L cylinder, fitted with valves such as G5/8 or CGA 580. Buyers should confirm cylinder size, fill weight and valve type with the supplier.
Safety & Handling
- Asphyxiant: xenon is non-toxic but can displace oxygen in confined spaces and cause rapid suffocation; monitor oxygen before entering enclosed areas.
- Non-flammable: classified DOT 2.2 (UN 2036). Under fire exposure, container pressure rises and may rupture; keep cylinders cool with water spray.
- Storage: keep cylinders secured upright in a cool, well-ventilated area away from heat sources; use compatible pressure regulators (e.g., CGA 580 / G5/8).
- Cold contact: escaping compressed gas can cause frostbite on skin or eye contact.
- No chemical hazard: xenon is inert under normal conditions and is not a greenhouse gas or ozone-depleting substance.
Frequently Asked Questions
What is xenon gas?
Xenon (Xe) is a colorless, odorless, non-flammable and chemically inert noble gas with atomic number 54. It is a monatomic gas that occurs naturally in Earth’s atmosphere at only about 0.087 ppm by volume, making it one of the rarest commercially recovered gases. Its CAS number is 7440-63-3 and UN number is 2036.
What is xenon used for?
Xenon has high-value applications across several industries: HID and specialty lighting (automotive headlamps, cinema projection, photographic flash); semiconductor manufacturing (excimer lasers such as KrF/ArF for photolithography, and xenon difluoride XeF2 for silicon etching); aerospace ion propulsion (satellite and deep-space thrusters); and medicine (anesthetic gas and imaging/contrast research). It is also used in scientific research, calibration gases and NMR spectroscopy.
Is xenon toxic or flammable?
Xenon is non-toxic and non-flammable. It is classified as a DOT Class 2.2 non-flammable compressed gas (UN 2036). Its main hazard is simple asphyxiation: in confined spaces it can displace oxygen and cause suffocation. Unlike some fluorinated gases, xenon is not a greenhouse gas and is not regulated under F-gas legislation.
What purity grades of xenon are available?
Commercial xenon is typically supplied at N4.5 (99.995%) for general lighting and industrial use, N5 (99.999%) for semiconductor photolithography, excimer lasers and medical imaging — the largest market segment — and ultra-high-purity grades up to 99.9999% (6N) for the most advanced lithography and research. Newradar supplies xenon at 99.99%–99.9999% depending on grade.
How is xenon produced and why is it costly?
Xenon is captured as a by-product of large-scale air separation units (ASUs) that produce oxygen and nitrogen, then purified by cryogenic distillation. Because atmospheric abundance is only about 0.087 ppmv and recovery depends on overall industrial gas output, supply is limited and cyclical, which keeps xenon pricing higher than common industrial gases and makes reliable long-term supply important for buyers.
How is xenon gas supplied and packaged?
Xenon is shipped as a compressed gas in seamless steel cylinders. Common configurations range from 8 L to 50 L cylinders, with fill volumes around 1,200–1,300 L per 8 L cylinder and up to about 10 m3 per 50 L cylinder, fitted with valves such as G5/8 or CGA 580. Buyers should confirm cylinder size, fill weight and valve type with the supplier.
References
- Newradar Gas — Xenon (Xe) product page (nrdgas.com/xe-xenon-gas-product/)
- Newradar Gas — “What Is Xenon? Properties, Uses, and Market Overview”
- WestAir Gases — “Is Xenon a Noble Gas?” (properties, atmospheric abundance, safety)
- Air Water America — Rare & Speciality Gas: Xenon (commercial purity, applications)
- Fortune Business Insights — Xenon Market Size & Forecast, 2026–2034
- IMARC Group — Xenon Gas Market Report, 2026–2034
Looking for xenon gas supply? Visit the product page for specifications, packaging and a quote: Xenon (Xe) Gas.
Post time: Jul-23-2026