Fluid Properties Reference

Physical properties of common process liquids and gases: density, dynamic/kinematic viscosity, specific heat, critical constants, and thermal conductivity for hydraulic calculations.

Physical properties of common gases at 0 °C and 1 bar

Acethylene	C₂H₂	1.171	26.04	319.6	1683	1352	1.25	9.35
Air	Air	1.293	28.95	287	1010	720	1.4	17.3
Ammonia	NH₃	0.771	17.03	488.3	2219	1680	1.37	9.18
Argon	Ar	1.782	39.94	208.5	532	322	1.65	20.9
Butane	C₄H₁₀	2.673	58.12	143.2	1917	1733	1.108	8.1
Carbon Dioxide	CO₂	1.976	44.01	189	837	653	1.3	13.7
Carbon Monoxide	CO	1.25	28.01	297	1047	754	1.4	16.6
Chlor	Cl₂	3.217	70.91	117.3	481	355	1.36	12
Ethane	C₂H₆	1.357	30.06	276.7	1729	1445	1.2	8.5
Ethyl Chloride	C₂H₅Cl	–	64.5	129	1340	1186	1.13	9.4
Ethylene	C₂H₄	1.261	28.05	296.6	1528	1222	1.25	9.85
Helium	He	0.178	4.002	2079	5274	3181	1.66	18.8
Hydrogen	H₂	0.08985	2.016	4125	14,266	10,130	1.407	8.42
Hydrogen Chloride	HCl	1.639	36.47	228	812	583	1.4	146.4
i-Butane	C₄H₁₀	2.668	58.12	143.2	1632	–	1.097	7.47
Krypton	Kr	3.708	83.7	100.3	251	151	1.67	23.2
Methane	CH₄	0.717	16.03	518.8	2225	1700	1.31	10.3
Methyl Chloride	CH₃Cl	2.308	50.48	164.8	741	582	1.28	9.89
Neon	Ne	0.9002	20.18	411.7	1038	620	1.68	29.7
Nitrogen	N₂	1.251	28.02	296.7	1047	746	1.4	17
Nitrogen Oxide	NO	1.34	30.01	277.1	975	696	1.38	17.8
Oxygen	O₂	1.429	32	259.9	913	653	1.4	20.3
Ozone	O₃	2.22	48	173.4	820	–	1.29	–
Pentane	C₅H₁₂	–	72.1	115.2	1717	1575	1.09	8.74
Propane	C₃H₈	2.02	44.06	188.8	1863	1650	1.13	7.95
Propene	C₃H₆	1.914	42.05	198.8	1635	1437	1.17	8.35
R-1234YF	CF₃CF/CH₂	4.3	114.04	72.9	750	600	1.25	10
R-407c	CF₂H₂/CF₃CHF/CF₃CH₂F	4.63	86.2	96.45	816	714	1.143	12.3
R-410a	CF₂H₂/CF₃CHF	3	72.6	114.5	830	706	1.176	13.3
Sulphur Dioxide	SO₂	2.927	64.06	129.8	633	503	1.25	11.7
Sulphur Hydrogen	H₂S	1.539	34.09	244.2	1059	804	1.3	11.66
Tetrafluoroethane HFC-134a	CH₂FCF₃	5.257	102.03	81.486	851	760	1.12	11.7
Xenon	Xe	5.851	131.3	63.84	159	96.3	1.7	21

Reference conditions 0 °C / 1 bar. null = data not available in source. Viscosity converted from Pa·s to µPa·s for readability (1 µPa·s = 10⁻⁶ Pa·s).

About this data

Engineering reference data at 0 °C / 1 bar reference conditions, except the Air, Water, and Steam tables which are temperature-dependent. Values marked – are not available in the source. Verify properties against a qualified property database (e.g. NIST) before use in critical design.