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For a list of our isotope-labeled gases (includes high-purity gases, calibrants, and mixtures), refer to our Stable Isotope-Labeled Gases catalog. These can be used in a variety of applications. Examples include breath tests, microelectronics, organic light-emitting diodes (OLEDs), nitrogen fixation, quantum computing, and in vivo labeling of plants. Please inquire if an alternate gas, label, or mixture is required to satisfy your research needs.


Stable Isotope-Labeled Gases
Gas Packaging Options


Frequently Asked Questions 

When will a gas liquefy?

A liquefied gas is a gaseous substance at ambient temperature and pressure that undergoes liquefaction by pressurization and/or refrigeration. This process compresses the gas making it suitable for gas carriage. As these gases are typically flammable with inherent safety hazards, these must be handled with care and transported by a suitable gas carrier. Examples of gases that liquefy include ammonia, 1,3-butanediene, carbon dioxide, propane, and ethane.

How do you calculate the approximate pressure in a cylinder at 20°C?

For ideal gases, the pressure can be calculated using the combined gas law: P1V1/T1 = P2V2/T2. To solve for P, factor in the following known values: volume of cylinder (e.g., 3 L), volume ordered (e.g., 20 L), temperature (i.e., standard – 273 K, atmospheric – 293 K), and atmospheric pressure (i.e., 14.7 psi). This equation does not account for the nonideality of gases nor does it apply to gases that liquefy in the cylinder.

Which gases can be refilled?

Examples of gases that can be refilled are carbon dioxide, carbon monoxide, methane, and nitrogen.



Sultana, N.; Zhao, J.; Zheng, Y.; et al. 2019. Stable isotope probing of active methane oxidizers in rice field soils from cold regions. Biol Fert Soils, 55, 243-250.
Apps, S.L.; White, A.J.P.; Miller, P.W.; et al. 2018. Synthesis and reactivity of an N-triphos Mo(0) dinitrogen complex. Dalton Trans, 47(33), 11386-11396. PMID: 30062342
Lynch, L.M.; Machmuller, M.B.; Cotrufo, M.F.; et al. 2018. Tracking the fate of fresh carbon in the Arctic tundra: Will shrub expansion alter responses of soil organic matter to warming? Soil Biol and Biochem, 120, 134-144.
Follett, C.L.; White, A.E.; Wilson, S.T.; et al. 2018. Nitrogen fixation rates diagnosed from diurnal changes in elemental stoichiometry. Limnol Oceanogr.
Liu, Y.; Misztal, P.K.; Xiong, J.; et al. 2018. Detailed investigation of ventilation rates and airflow patterns in a northern California residence. Indoor Air, 28(4), 572-584. PMID: 29665159
Maity, A.; Pal, M.; Maithani, S.; et al. 2016. Molecular hydrogen in human breath: a new strategy for selectively diagnosing peptic ulcer disease, non-ulcerous dyspepsia and Helicobacter pylori infection. J Breath Res, 10(3), 036007.  PMID: 27448107
Ellen Genetti

Ellen Genetti

Product Manager – Gases