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This article is considered accurate for the current version (Launch Update).

Gases are substances that expand to fill their container.

Mechanics[edit | edit source]

  • Gases will precipitate into a liquid if cooled past their condensation point.
  • Unlike liquids, gases will always spread to nearby vacuum tiles (unless less than 1 microgram of the gas is present).
  • Elements with a lower density tend to rise above others. In the case of gases with the same density (e.g. Oxygen and Polluted Oxygen), they tend to group together and form different layers.
  • Duplicants can breathe Oxygen and Polluted Oxygen.
  • Unless specified, Critters do not breathe, and may survive in any gas as long as other conditions are met.
    • They can also survive in a vacuum.
    • Airborn Critters can fly/float in a vacuum.
  • Gases will be destroyed when exposed to space, unless protected by Drywall.
  • Gas can be stored in a Gas Reservoir.
  • Duplicants can be scalded by hot Gases like Steam. Wearing an Atmo Suit will protect them.

List of Gases[edit | edit source]

Gases tend to stratify (separate by height) as follows, from lightest to heaviest:

 Name Description Condensation point
Transition Specific Heat Capacity
Thermal Conductivity
HydrogenHydrogen (H) Hydrogen is the universe's most common and atomically light element in a Gaseous state. -252.15 Liquid Hydrogen 2.400 0.168 1.00794
Helium (unused) (He) Helium is an atomically lightweight, chemical Gas. -268.93 Liquid Helium 0.140 0.236 4
Gas Carbon (C) Carbon is an abundant, versatile element heated into a Gaseous state. 4826.85 Liquid Carbon 0.710 1.700 12.0107
Polluted OxygenPolluted Oxygen (O2) Polluted Oxygen is dirty, unfiltered air.
It is breathable.
-182.96 Liquid Oxygen 1.010 0.024 15.9994
OxygenOxygen (O2) Oxygen is an atomically lightweight and breathable Gas, necessary for sustaining life.
It tends to rise above other gases.
 -182.96 Liquid Oxygen 1.005 0.024 15.9994
Natural GasNatural Gas Natural Gas is a mixture of various alkanes in a Gaseous state.
It is useful in Power production.
-161.5 Methane 2.191 0.035 16.044
SteamSteam (H2O) Steam is a water that has been heated into a scalding Gas. 99.35 Water 4.179 0.184 18.01528
Sour Gas Sour Gas is a hydrocarbon Gas containing high concentrations of hydrogen sulfide.
It is a byproduct of highly heated Petroleum.
-161.5 Methane 1.898 0.018 19.044
Gas Phosphorus (P) Phosphorus is a chemical element in a Gaseous state.  280.45 Liquid Phosphorus 0.770 0.236 30.973762
Gas Sulfur (S) Sulfur is a common chemical element and byproduct of Natural Gas production.
This selection is in a Gaseous state. 
337 Liquid Sulfur 0.700 0.200 32
ChlorineChlorine (Cl) Chlorine is an extremely toxic chemical in a Gaseous state.  -34.6 Liquid Chlorine 0.480 0.008 34.453
Carbon DioxideCarbon Dioxide (CO2) Carbon Dioxide toxic, atomically heavy chemical compound in a Gaseous state.
It tends to sink below other gases. 
-48.15 Liquid Carbon Dioxide 0.846 0.015 44.01
Propane (unused) (C3H8) Propane is a natural alkane Gas.
It is useful in Power production. 
-42.15 Liquid Propane 2.400 0.015 44.1
Rock Gas Rock Gas is rock that has been superheated into a Gaseous state.  2356.85 Magma 1.000 0.100 50
Salt Gas (NaCl) Salt Gas is an edible chemcial compound that has been superheated into a Gaseous state. 1464.85 Molten Salt 0.880 0.444 50
Gas Steel Steel is a superheated Metal Gas composed of iron and carbon.  3826.85 Liquid Steel 0.490 1.000 54.97
Gas Iron (Fe) Iron is a common industrial Metal, heated into a Gas.  2749.85 Liquid Iron 0.449 1.000 55.845
Gas Copper (Cu) Copper is a conductive Metal heated into a Gas.  2560.85 Liquid Copper 0.386 1.000 63.546
Gas Aluminum (Al) Aluminum is a low density Metal. 2470 Molten Aluminum 0.910 2.500 63.546
Gas Niobium (Nb) Niobium is a Rare Metal.
This selection is in a Gaseous state. 
4743.85 Liquid Niobium 0.265 1.000 92.9
Gas Tungsten (W) Tungsten is a superheated crystalline Metal.
This selection is in a Gaseous state. 
5929.85 Liquid Tungsten 0.134 1.000 183.84
Gas Ethanol (C2H5OH) Ethanol is a high toxic chemical compound. It can be used as highly effective fuel source when its burned. 78.35 Ethanol 2.148 0.167 183.84
Gas Super Coolant Super Coolant is an industrial grade Fullerene coolant.
This selection is in a Gaseous state. 
436.85 Super Coolant 8.440 1.200 190
Gas Gold (Au) Gold is a conductive precious Metal, heated into a Gas.  2855.85 Liquid Gold 0.129 1.000 196.966569
Gas Lead (Pb) Lead is a soft yet extremely dense Refined Metal. 1749 Molten Lead 0.128 3.500 196.966569
Gas Mercury (unused) (Hg) Mercury is a toxic Metal heated into a Gaseous state.  356.75 Mercury 0.140 8.300 200.59