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Name	Hydrogen sulfide	EINECS	231-977-3
CAS No.	7783-06-4	Density	1.19 (15oC. vs air)
PSA	25.30000	LogP	0.11280
Solubility	N/A	Melting Point	?85 °C(lit.)
Formula	H2S	Boiling Point	-60 ºC
Molecular Weight	34.0819	Flash Point	-82 C
Transport Information	UN 1053 2.3	Appearance	colourless gas with strong odour of rotten eggs
Safety	9-16-36-38-45-61 7	Risk Codes	12-26-50
Molecular Structure		Hazard Symbols	T+F+N
Synonyms	Dihydrogenmonosulfide; Dihydrogen sulfide; Hydrogen sulfide; Hydrosulfuric acid; Stinkdamp; Sulfur dihydride; Sulfur hydride; Sulfur hydride (SH2); Sulfuretedhydrogen	Article Data	2573

Hydrogen sulfide Synthetic route

: 7446-09-5
sulfur dioxide

: 1333-74-0
hydrogen

A: 23550-45-0
disulfur

B: 7783-06-4
hydrogen sulfide

Conditions

Conditions	Yield
In neat (no solvent) byproducts: H2O; redn. of SO2 by H2 (1:2), SO2-conversion at 114°C practically 100%;;	A 100% B n/a
In neat (no solvent) byproducts: H2O; redn. of SO2 by H2 (1:2), SO2-conversion at 114°C practically 100%;;	A 100% B n/a
In neat (no solvent) byproducts: H2O; redn. of SO2 by H2, investigation of equilibrium constants;;

: 34557-54-5
methane

: 7446-09-5
sulfur dioxide

: 7783-06-4
hydrogen sulfide

Conditions

Conditions	Yield
With catalyst: cobalt molybdate/SiO2 great excess of CH4; Co molybdate supported on SiO2; at 593-704°C and 1 atm;	100%
With catalyst: V/Al2O3 20 vol% SO2 : 80 vol% CH4; 5 % V on γ-Al2O3; at 545°C and atm. pressure;	95-100
calcium(II) sulfide

: 594-08-1
trithiocarbonic acid

: 7783-06-4
hydrogen sulfide

Conditions

Conditions	Yield
In water thermal decompn. of 1/50-1/400 N aq. solns. of educt at 0-21.5°C;	98.5%

: Glauber's salt

: 201230-82-2
carbon monoxide

: 1333-74-0
hydrogen

A: 7783-06-4
hydrogen sulfide

B: 7732-18-5
water

C: 497-19-8
sodium carbonate

Conditions

Conditions	Yield
with molten Na2SO4*10H2O; heating at 927 to 983°C for 2 h; ratio of CO and H2 1:3;	A 98% B n/a C n/a

...Expand

: 7047-10-1
5-phenyl-3H-1,2,4-dithiazole-3-one

A: 7783-06-4
hydrogen sulfide

B: 2227-79-4
benzenecarbothioamide

Conditions

Conditions	Yield
With carbonic anhydrase from bovine erythrocytes; GLUTATHIONE In aq. phosphate buffer; dimethyl sulfoxide at 20℃; for 4h; pH=7.4; Reagent/catalyst; Enzymatic reaction;	A n/a B 98%

: 201230-82-2
carbon monoxide

: 7664-41-7
ammonia

: 7704-34-9
sulfur

A: 7783-06-4
hydrogen sulfide

B: 57-13-6
urea

Conditions

Conditions	Yield
In methanol; water molar ratio of CO:S = 1.36; 35 min; at 110°C; 60% excess of NH3; 75% CH3OH;	A n/a B 96.2%
In methanol; water molar ratio of NH3:S:CO = 1.4 : 1 : 1.36; 35 min; at 110°C; 54% CH3OH;	A n/a B 96.2%
In methanol; water molar ratio of NH3:S:CO = 1.4 : 1 : 1.36; 35 min; at 110°C; 54% CH3OH;	A n/a B 96.3%

: 1333-74-0
hydrogen

: 7704-34-9
sulfur

: 7783-06-4
hydrogen sulfide

Conditions

Conditions	Yield
With catalyst: Ni-Cr catalyst unstable at 360°C; 10-20 % excess of S;	95.9%
With catalyst: Ni-Cr catalyst unstable at 360°C; 10-20 % excess of S;	95.9%
nickel at 360°C; 10-20 % excess of S;	91.1%

: manganese(II) sulfide

: ammonium tetrathionate

A: ammonium thiosulfate

B: manganese sulfite

C: manganese thiosulfate

D: 7783-06-4
hydrogen sulfide

E: 7704-34-9
sulfur

Conditions

Conditions	Yield
21 hours;	A n/a B n/a C 95% D n/a E n/a
21 hours;	A n/a B n/a C 95% D n/a E n/a
1/2 hours;	A n/a B n/a C 56% D n/a E n/a
1/2 hours;	A n/a B n/a C 56% D n/a E n/a

...Expand

: 7647-01-0
hydrogenchloride

: sodium hydrogen sulfide

A: 7783-06-4
hydrogen sulfide

B: 7647-14-5
sodium chloride

Conditions

Conditions	Yield
-78°C;	A n/a B 92%

: 23550-45-0
disulfur

: 7732-18-5
water

: 7783-06-4
hydrogen sulfide

Conditions

Conditions	Yield
With pyrographite In water byproducts: CO; react. at 600 to 800°C;; yield of H2S 90% (corresponding to S), theoretically calcd.;;	90%
With C In water byproducts: CO; react. at 600 to 800°C;; yield of H2S 90% (corresponding to S), theoretically calcd.;;	90%

Hydrogen sulfide Chemical Properties

Molecular Structure:

Molecular Formula: H₂S
Molecular Weight: 34.0809
IUPAC Name: Hydrogen sulfide
Synonyms of Hydrogen sulfide (CAS NO.7783-06-4): Hydrogen sulfide (H2S) ; Hydrogen sulphide ; Hydrogen sulfide H2S ; Hydrogen sulfide [UN1053] [Poison gas] ; RCRA waste no. U135 ; UN1053
CAS NO: 7783-06-4
Classification Code: Air pollutants ; Environmental Pollutants ; Human Data ; Reproductive Effect
Melting point: −85 °C
Polar Surface Area: 25.3 Å²
Enthalpy of Vaporization: 18.67 kJ/mol
Vapour Pressure: 12600 mmHg at 25°C

Hydrogen sulfide Uses

Hydrogen sulfide (CAS NO.7783-06-4) is used in the producetion of several organosulfur compounds.
Upon combining with alkali metal bases, hydrogen sulfide converts to alkali hydroSULFIDES such as SODIUM HYDROSULFIDE and sodium sulfide, which are used in the degradation of biopolymers. It was used in analytical chemistry. It is a precursor to metal SULFIDES. It is also used in the separation of DEUTERIUM oxide.

Hydrogen sulfide Production

Hydrogen sulfide (CAS NO.7783-06-4) is obtained by its separation from sour gas, which is natural gas with high content of H₂S. It can be produced by reacting hydrogen gas with molten elemental SULFUR at about 450 °C.

Hydrogen sulfide Toxicity Data With Reference

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
human	LCLo	inhalation	600ppm/30M (600ppm)		"Practical Toxicology of Plastics," Lefaux, R., Cleveland, OH, Chemical Rubber Co., 1968Vol. -, Pg. 207, 1968.
human	LCLo	inhalation	800ppm/5M (800ppm)		Tabulae Biologicae. Vol. 3, Pg. 231, 1933.
mammal (species unspecified)	LCLo	inhalation	800ppm/5M (800ppm)		Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 138, Pg. 65, 1928.
man	LCLo	inhalation	5700ug/kg (5.7mg/kg)	BEHAVIORAL: COMA LUNGS, THORAX, OR RESPIRATION: CHRONIC PULMONARY EDEMA	Archives des Maladies Professionnelles de Medecine du Travail et de Securite Sociale. Vol. 44, Pg. 483, 1983.
mouse	LC50	inhalation	634ppm/1H (634ppm)		Aerospace Medical Research Laboratory Report. Vol. TR-72-62, Pg. 1972,
rat	LC50	inhalation	444ppm (444ppm)	LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA" KIDNEY, URETER, AND BLADDER: URINE VOLUME INCREASED	Personal Communication from H.B. Lackey, Chemical Products Div., Crown Zellerbach, Camas, WA 98607, June 9, 1978Vol. 09JUN1978,

Hydrogen sulfide Safety Profile

HYDROGEN sulfide is a highly toxic and flammable gas. Being heavier than air, it tends to accumulate at the bottom of poorly ventilated spaces. Although very pungent at first, it quickly deadens the sense of smell, so potential victims may be unaware of its presence until it is too late. For safe handling procedures, a HYDROGEN sulfide material safety data sheet (MSDS) should be consulted.
Hazard Codes of Hydrogen sulfide (CAS NO.7783-06-4): Highly F+, Very T+, Dangerous N
Risk Statements: 12-26-50
R12: Extremely flammable.
R26: Very toxic by inhalation.
R50: Very toxic to aquatic organisms.
Safety Statements: 9-16-36-38-45-61
S9: Keep container in a well-ventilated place.
S16: Keep away from sources of ignition.
S36: Wear suitable protective clothing.
S38: In case of insufficient ventilation, wear suitable respiratory equipment.
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S61: Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: UN 1053 2.3
WGK Germany: 2
HazardClass: 2.3

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