Hydrogen sulfide

H₂S
CAS Number 7783-06-4
UN1053 (gas)

Molecule
Properties
Applications
Safety & Compatibility
Learn More

Click & drag to move the 3D molecule

Liquid / Gas Volumes

Calculate the volume or mass of a quantity of gas or liquid

Liquid Phase

At boiling point at 1.013 bar

m³ (Volume)

kg (Mass)

Gas Phase

In standard conditions (1.013 bar, 15°C)

m³ (Volume)

kg (Mass)

Physical Properties

Download the set of data (XLS - 73.73 KB)

General Properties
Solid Phase
Liquid Phase
Gas Phase

Molecule phase diagram showing the transition phases between solid, liquid and gas as a function of temperature and pressure

Pressure (bar)

- Molar mass 34.081 g/mol
- Content in dry air /
Critical Point
- Temperature 100.38 °C
- Pressure 89.6291 bar
- Density 346.00 kg/m³
Triple Point
- Temperature -85.45 °C
- Pressure 2.32E-1 bar

Pressure 1.013 bar

Latent heat of fusion (at melting point)	69.731 kJ/kg
Melting point	- 85.7 °C

Pressure 1.013 bar

Boiling point	- 60.3 °C
Latent heat of vaporization (at boiling point)	546.41 kJ/kg
Liquid density (at boiling point)	949.2 kg/m³

Pressure 1.013 bar

0 °C
15 °C
25 °C

Compressibility factor Z	9.8989E-1
Cp/Cv ratio γ	1.337
Gas density	1.5357 kg/m³
Gas/(liquid at boiling point) equivalent	618.09 vol/vol
Heat capacity Cp	1.0116 kJ/(kg.K)
Heat capacity Cv	7.5658E-1 kJ/(kg.K)
Specific gravity	1.19
Specific volume	6.512E-1 m³/kg
Thermal conductivity	12.65 mW/(m.K)
Vapor pressure	10.3288 bar
Viscosity	1.1298E-4 Po
Gas density (at boiling point)	1.997 kg/m³

Compressibility factor Z	9.9148E-1
Cp/Cv ratio γ	1.3333
Gas density	1.4534 kg/m³
Gas/(liquid at boiling point) equivalent	653.09 vol/vol
Heat capacity Cp	1.0126 kJ/(kg.K)
Heat capacity Cv	7.5946E-1 kJ/(kg.K)
Solubility in water	2.335E-3 mol/mol
Specific gravity	1.19
Specific volume	6.881E-1 m³/kg
Thermal conductivity	13.766 mW/(m.K)
Vapor pressure	15.6544 bar
Viscosity	1.195E-4 Po

Compressibility factor Z	9.9236E-1
Cp/Cv ratio γ	1.331
Gas density	1.4034 kg/m³
Gas/(liquid at boiling point) equivalent	676.36 vol/vol
Heat capacity Cp	1.014 kJ/(kg.K)
Heat capacity Cv	7.6186E-1 kJ/(kg.K)
Solubility in water	1.85E-3 mol/mol
Specific gravity	1.19
Specific volume	7.126E-1 m³/kg
Thermal conductivity	14.465 mW/(m.K)
Vapor pressure	20.1687 bar
Viscosity	1.2387E-4 Po

Applications

Examples of uses of this molecule in Industry and Healthcare

Electronic components

Hydrogen sulfide provides sulphur source to copper indium gallium film to adjust the light absorption bandgap in chalcogenide thin film photovoltaics.

Laboratories & Research Centers

Hydrogen sulfide is used in calibration gas mixtures for petrochemical industry, environmental emission monitoring, industrial hygiene monitors and trace impurity analyzers, especially to control hydrogen quality.

Pharma & Biotech

Hydrogen sulfide is a reactant in some chemical processes.

Safety & Compatibility

Major Hazards
Material Compatibility

GHS02

Flammable

GHS04

Gas under pressure

GHS06

Acute Toxicity

GHS09

Hazardous to the environment

Autoignition Temperature, Flammability Limits & Flash Point

Europe (according to EN1839 for Limits and EN 14522 for autoignition temperature)

Autoignition temperature (Chemsafe)	270 °C
Lower flammability limit (IEC 80079-20-1)	3.9 vol%
Upper flammability limit (IEC 80079-20-1)	50.2 vol%

US (according to ASTM E681 for Limits and ASTM E659 for autoignition temperature)

Autoignition temperature (NFPA 325)	260 °C
Lower flammability limit (NFPA 325)	4 vol%
Upper flammability limit (NFPA 325)	44 vol%

Threshold of toxicity

ILV-15min EU (at Patm and 293.15 K)	14 mg/m³ or 10 ppm
ILV-8h EU (at Patm and 293.15 K)	7 mg/m³ or 5 ppm
VLEP 8h France (at Patm and 293.15 K)	7 mg/m³ or 5 ppm
VLEP CT France (at Patm and 293.15 K)	14 mg/m³ or 10 ppm

Odor

Rotten egg

Metals

Aluminium	Satisfactory
Brass	Not recommended
Monel	No data
Copper	No data
Ferritic Steel	In humid conditions, risks of cracking and hydrogen embrittlement Acceptable
Stainless steel	Satisfactory
Zinc	No data
Titanium	No data

Plastics

Polytetrafluoroethylene	Risk of permeation Acceptable
Polychlorotrifluoroethylene	Satisfactory
Polyvinylidene fluoride	Satisfactory
Polyvinyl chloride	Satisfactory
Ethylene tetrafluoroethylene	No data
Polycarbonate	No data
Polyamide	Satisfactory
Polypropylene	Satisfactory

Elastomers

Butyl (isobutene- isoprene) rubber	Significant loss of mass Acceptable
Nitrile rubber	Significant loss of mass Not recommended
Chloroprene	Significant loss of mass Not recommended
Chlorofluorocarbons	No data
Silicone	significant loss of mass Not recommended
Perfluoroelastomers	Significant loss of mass Not recommended
Fluoroelastomers	Significant loss of mass Not recommended
Neoprene	No data
Polyurethane	Significant loss of mass Not recommended
Ethylene-Propylene	Satisfactory

Lubricants

Hydrocarbon based lubricant	Contamination of the material Not recommended
Fluorocarbon based lubricant	contamination of the material Not recommended

Materials compatibility

Recommendations : Air Liquide has gathered data on the compatibility of gases with materials to assist you in evaluating which materials to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1- Metallic materials: ISO11114-1 (March 2012), Part 2 - Non-metallic materials: ISO11114-2 (April 2013), it must be used with extreme caution and engineering judgement. No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is only used to identify possible materials for applications at high pressure and ambient temperature. Extensive investigation and testing under the specific conditions of use need to be carried out to validate a material selection for a given application. Contact the regional Air Liquide team for expertise service.

Learn More

More information

The human body produces small amounts of hydrogen sulfide.