Hydrogen Sulfide - Evikon PluraSens E2658 Series User Manual

E2658-H2S
Hydrogen Sulfide
Colorless toxic, corrosive and flammable gas with a smell of rotten eggs. Occurs in natural
gas, volcanic gases, petroleum, and some sources of well water. It results from the
anaerobic decay of sulfur-containing proteins, e.g. in sewers.
Synonyms: Hydrosulfuric acid, Sewer gas, Sulfuretted hydrogen.
Chemical formula
Molar weight
Conversion
Relative gas density (to air)
Boiling point
Low explosive limit (LEL), % vol.
in air
Upper explosive limit (UEL), %
vol. in air
Odor
Odor threshold
Hazards
Exposure limits
(Commission
Directive
2009/161/EU)
Conversion of ppm to mg/m
The characteristic smell of rotten eggs. Above 30 ppm, the odor is
Note: Sense of smell becomes rapidly fatigued and can NOT be
Broad-spectrum poison, mostly affecting the nervous system. At
low concentrations causes eye irritation, a sore throat and cough,
nausea, shortness of breath, and pulmonary edema. Long-term,
low-level exposure results in fatigue, loss of appetite, headache,
poor memory, irritability, and dizziness. Exposure to high levels
can induce immediate collapse, with loss of breathing and a high
TWA
STEL
IDLH
(NIOSH)
3
is calculated for 25°C and 1 atm.
described as sweet or sickeningly sweet.
relied upon to warn of the continuous presence of H
3
Rev 12.03.2021
1 ppm = 1.40 mg/m
0.01-1.5 ppm
Highly flammable, explosive gas.
probability of death.
7 mg/mm
14 mg/mm
140 mg/mm
H S
2
34
3
1.17
−60 °C
4.0
44.0
S.
2
3
/ 5 ppm
3
/ 10 ppm
3 / 100 ppm