7783-06-4

Basic information

• Product Name: Hydrogen sulfide
• Synonyms: Dihydrogenmonosulfide; Dihydrogen sulfide; Hydrogen sulfide; Hydrosulfuric acid; Stinkdamp; Sulfur dihydride; Sulfur hydride; Sulfur hydride (SH2); Sulfuretedhydrogen
• CAS NO: 7783-06-4
• Molecular Formula: H₂S
• Molecular Weight: 34.08
• EINECS: 231-977-3
• Mol File: 7783-06-4.mol
• Article Data: 169

Chemical Properties

• Boiling Point: -60 ºC
• Flash Point: -82 C
• Appearance: colourless gas with strong odour of rotten eggs
• Density: 1.19 (15oC. vs air)
• CAS DataBase Reference: Hydrogen sulfide(CAS DataBase Reference)
• NIST Chemistry Reference: Hydrogen sulfide(7783-06-4)
• EPA Substance Registry System: Hydrogen sulfide(7783-06-4)

Safety Data

• Hazardous Substances Data: 7783-06-4(Hazardous Substances Data)

Usage

Description

Hydrogen sulfide, with the chemical formula H2S, is a colorless, flammable, and highly toxic gas that is notorious for its pungent rotten egg odor. It is generated through the bacterial decomposition of organic matter and waste materials, as well as through natural geological events like volcanic activity. This gas is denser than air, which allows it to accumulate in low-lying areas, posing a significant health risk when present in high concentrations. Exposure to such levels can lead to respiratory irritation, unconsciousness, and potentially fatal outcomes. Additionally, hydrogen sulfide plays a role in the formation of acid rain, impacting the environment negatively.

Uses

Used in Chemical Industry:
Hydrogen sulfide is utilized as a raw material in the production of sulfuric acid and elemental sulfur. Its reactivity and availability make it a key component in various chemical processes, contributing to the synthesis of a wide range of products.
Used in Food Processing:
In the food industry, hydrogen sulfide is employed as a preservative and flavoring agent. Its antimicrobial properties help to extend the shelf life of certain food products, while its ability to react with other compounds can also influence the taste and aroma.
Used in Natural Gas Industry:
Hydrogen sulfide is added to natural gas as an odorant to provide a detectable smell, which is crucial for safety reasons. The distinctive rotten egg smell allows people to easily identify gas leaks, thereby preventing potential accidents and ensuring the safe use of natural gas in various applications.

InChI:InChI=1/H2S/h1H2

Synthetic route

sulfur dioxide (7446-09-5) + hydrogen (1333-74-0) → disulfur (23550-45-0) + hydrogen sulfide (7783-06-4)

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;;

methane (34557-54-5) + sulfur dioxide (7446-09-5) → hydrogen sulfide (7783-06-4)

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

trithiocarbonic acid (594-08-1) → hydrogen sulfide (7783-06-4)

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 + carbon monoxide (201230-82-2) + hydrogen (1333-74-0) → hydrogen sulfide (7783-06-4) + water (7732-18-5) + sodium carbonate (497-19-8)

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

5-phenyl-3H-1,2,4-dithiazole-3-one (7047-10-1) → hydrogen sulfide (7783-06-4) + benzenecarbothioamide (2227-79-4)

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%

carbon monoxide (201230-82-2) + ammonia (7664-41-7) + sulfur (7704-34-9) → hydrogen sulfide (7783-06-4) + urea (57-13-6)

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%

hydrogen (1333-74-0) + sulfur (7704-34-9) → hydrogen sulfide (7783-06-4)

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 → ammonium thiosulfate + manganese sulfite + manganese thiosulfate + hydrogen sulfide (7783-06-4) + sulfur (7704-34-9)

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

hydrogenchloride (7647-01-0) + sodium hydrogen sulfide → hydrogen sulfide (7783-06-4) + sodium chloride (7647-14-5)

Conditions	Yield
-78°C;	A n/a B 92%

disulfur (23550-45-0) + water (7732-18-5) → hydrogen sulfide (7783-06-4)

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%

trans-MoS2(dmpe)2 + trifluorormethanesulfonic acid (1493-13-6) → trans-[MoS(OTf)(dmpe)2]OTf + hydrogen sulfide (7783-06-4)

Conditions	Yield
In acetonitrile (N2); HO3SCF3 in MeCN added to a soln. of Mo complex for 1 min, stirred under N2 for 30 min; concd., pptd. (Et2O), decanted, washed (Et2O), dried (vac.); elem. anal.;	A 90% B n/a

carbon oxide sulfide (463-58-1) + ammonia (7664-41-7) → hydrogen sulfide (7783-06-4) + urea (57-13-6)

Conditions	Yield
1.5-fold molar excess of NH3; at 105°C;	A n/a B 88%
In ethanol at a temp. near the m.p. of urea; using abs. ethanol;	A n/a B 76%
In ammonia at a temp. near the m.p. of urea;	A n/a B 64%

bis(tetraethylammonium)-bis[di-(thiophenolato)-(μ-sulfido)ferrate(III)] + nitrogen(II) oxide (10102-43-9) → (NEt4)[Fe(NO)2(thiophenol)2(-2H)] (106709-47-1) + hydrogen sulfide (7783-06-4) + sulfur (7704-34-9)

Conditions	Yield
With ethanethiol In acetonitrile at 20℃; for 1h; Reagent/catalyst; Inert atmosphere; Schlenk technique;	A 83% B 88% C 6.8%

(NEt4)2[Fe2S2(4-chlorothiophenol)4(-4H)] + nitrogen(II) oxide (10102-43-9) → C12H8Cl2FeN2O2S2(1-)*C8H20N(1+) + hydrogen sulfide (7783-06-4)

Conditions	Yield
With 2,4,6-tri-tert-butylphenoxol In acetonitrile at 20℃; for 1h; Inert atmosphere; Schlenk technique;	A 87% B 24%

(NEt4)2[Fe2S2(4-methoxythiophenol)4(-4H)] + nitrogen(II) oxide (10102-43-9) → C14H14FeN2O4S2(1-)*C8H20N(1+) + hydrogen sulfide (7783-06-4)

Conditions	Yield
With 2,4,6-tri-tert-butylphenoxol In acetonitrile at 20℃; for 1h; Inert atmosphere; Schlenk technique;	A 69% B 87%

methylthiol (74-93-1) → Dimethyldisulphide (624-92-0) + dimethyltrisulfane (3658-80-8) + hydrogen sulfide (7783-06-4)

Conditions	Yield
With 1-tridecanamine; sulfur at 60℃; for 12h;	A 83% B n/a C n/a
With triisobutylamine; sulfur at 60℃; for 13h;

carbon disulfide (75-15-0) + 1-amino-3-(dimethylamino)propane (109-55-7) → N1,N3-bis(3-dimethylaminopropyl)-thiourea (18884-15-6) + hydrogen sulfide (7783-06-4)

Conditions	Yield
In ethanol at 10℃; for 22h; Heating / reflux;	A 83% B n/a

bis(tetraethylammonium)-bis[di-(4-methylthiophenolato)-(μ-sulfido)ferrate(III)] + nitrogen(II) oxide (10102-43-9) → N(C2H5)4(1+)*Fe(NO)2(SC6H4CH3)2(1-)=N(C2H5)4Fe(NO)2(SC6H4CH3)2 + hydrogen sulfide (7783-06-4)

Conditions	Yield
With 2,4,6-tri-tert-butylphenoxol In acetonitrile at 20℃; for 1h; Inert atmosphere; Schlenk technique;	A 81% B 68%

bis(tetraethylammonium)-bis[di-(thiophenolato)-(μ-sulfido)ferrate(III)] + nitrogen(II) oxide (10102-43-9) + thiophenol (108-98-5) → (NEt4)[Fe(NO)2(thiophenol)2(-2H)] (106709-47-1) + hydrogen sulfide (7783-06-4) + sulfur (7704-34-9) + diphenyldisulfane (882-33-7)

Conditions	Yield
In acetonitrile at 20℃; for 1h; Inert atmosphere; Schlenk technique;	A 78% B 80% C 6.7% D n/a

sulfur (7704-34-9) → hydrogen sulfide (7783-06-4)

Conditions	Yield
With olive oil 1 wt. parts S and 2 wt. parts olive oil, at 162 to 190°C;	79.6%
the rate of formation affected by various aromatic amines;
Electrolysis; S melted on Pt plate used as cathode;

((C6F5)3Ge)2HgSGe(C6F5)3(1-)*(C5H5)2Co(1+)=((C6F5)3Ge)2HgSGe(C6F5)3((C5H5)2Co) → tris-(pentafluoro phenyl) germane thiol (54666-68-1) + bis[tris(pentafluorophenyl)germyl]mercury (35406-49-6) + hydrogen sulfide (7783-06-4) + tris(pentafuorophenyl)germane (42371-50-6) + Chloro[tris(perfluorophenyl)]-germane (1259-89-8)

Conditions

Yield

With hydrogen chloride In tetrahydrofuran byproducts: Cp2CoCl; HCl was added to a THF soln. of monothiomercurate, mixt. was kept in a sealed ampoule at 20°C for 1 h; solvent and volatiles (H2S) were removed, residue was extd. with hexane, ext. contained Ar3GeH, Ar3GeCl, and Ar3GeSH (GLC and LSC analyses), residue contained (Ar3Ge)2Hg and cobalt-containing product, probably Cp2CoCl (IR spectral and LSC data);

A 21% B 20% C 79% D 23% E 47%

sulfur (7704-34-9) → hydrogen sulfide (7783-06-4) + sulfur dioxide (7446-09-5)

Conditions	Yield
With paraffin at 176 to 240°C; yields of SO2 decreased in the presence of asbestos or pumice;	A 76.8% B n/a
With water formation of H2S and SO2 by reaction of sulfur with H2O; equilibrium reaction;;

calcium(II) sulfide + carbon dioxide (124-38-9) + water (7732-18-5) → hydrogen sulfide (7783-06-4) + calcium carbonate

Conditions	Yield
with twice the stoich. amts. of H2O and CO2, at 400°C and 2.7 atm;	A 71% B n/a
High Pressure; at 400 to 700°C and 40 atm;

carbon disulfide (75-15-0) + hydrogen (1333-74-0) → hydrogen sulfide (7783-06-4)

Conditions	Yield
platinum yield less than 70%; at 500.700°C;	70%
silver yield less than 70%; at 500.700°C;	70%
platinum at 690°C;	59.5%

1-penten (109-67-1) + disulfane (23550-45-0) → diamyl sulfide (872-10-6) + diamyl disulfide (112-51-6) + dipentyl tetrasulfide (13730-37-5) + hydrogen sulfide (7783-06-4)

Conditions	Yield
50°C; 15 h;	A 62% B 12.1% C 22% D 0%

water (7732-18-5) + sulfur (7704-34-9) + calcium oxide → hydrogen sulfide (7783-06-4)

Conditions	Yield
In sodium hydroxide presence of 1 to 10 wt% NaOH at >= 149°C under pressure; yield depends on the presence of NaOH;	50%

sulfur (10544-50-0) + [(EtC5Me4)ReCl2(η2-1,2-ethanedithiolato)] (461393-06-6) → (EtMe4C5)Re(η2-S3)Cl2 (335000-95-8) + [(EtC5Me4)Re(η2-1,2-ethanedithiolato)(S(x))] + [(EtC5Me4)ReCl2(η2-1,2-ethenedithiolato)] (461393-11-3) + hydrogen sulfide (7783-06-4)

Conditions	Yield
In (2)H8-toluene Kinetics; byproducts: H2S; (N2); using Schlenk techniques; dissolving of (EtC5Me4)ReCl2(SCH2CH2S) in toluene-d8, filtration, placing into NMR tube, freezing, evacuating, addn. of large excess of S8, degassing, sealing, heating to 70°C for several days; identification by NMR;	A 50% B 20% C 30% D n/a

1-(2,6-dichloro-benzyl)-6-sulfinooxy-1,4,5,6-tetrahydro-pyridine-3-carboxylic acid amide (96715-29-6) → hydrogen sulfide (7783-06-4)

Conditions	Yield
	47%

sodium sulfide + sulphurous acid (7782-99-2) → hydrogen sulfide (7783-06-4) + water (7732-18-5) + sodium thiosulfate + sodium sulfite (7757-83-7)

Conditions	Yield
In water a mixt. of 7% SO2 and 93% N2 is introduced into concd. Na2S soln. at 60°C;;	A n/a B n/a C 46% D n/a

sulfuric acid (7664-93-9) → sulfur (10544-50-0) + hydrogen sulfide (7783-06-4)

Conditions	Yield
With PPA; potassium iodide In sulfolane byproducts: N,N-dicyclohexylthiourea, I2; reactor A: polyphosphoric acid + KI in sulfolane, addn. of H2SO4 and (n-Bu4N)I; in reactor B: a soln. of dicyclohexylcarbodiimide in C6H6 (for detecting H2S); jointed A,stirred at room temp.; stirred A for 4 h at 75°C under flowing of N2; H2O added in A, mixt. stirred for 1 h at 75°C, poured into C6H6, washed with H2O, dried, filtered, filtrate evapd., chromd. S8 (SiO2, C6H6); added H2O in B, kept for few h, poured into C6H6, washed with H2O, dried, evapd., chromd. (SiO2, CHCl3);	A 42% B 15%
With potassium iodide In acetonitrile byproducts: N,N-dicyclohexylthiourea, I2; reactor A: ethyl polyphosphate + KI in MeCN, addn. of H2SO4 and (n-Bu4N)I; in reactor B: a soln. of dicyclohexylcarbodiimide in C6H6 (for detecting H2S); jointed A, stirred at room temp.; stirred A for 5 h at 25°C under flowing of N2; H2O added in A, mixt. stirred for 1 h at 75°C, poured into C6H6, washed with H2O, dried, filtered, filtrate evapd., chromd. S8 (SiO2, C6H6); added H2O in B, kept for few h, poured into C6H6, washed with H2O, dried, evapd., chromd. (SiO2, CHCl3);	A 23% B <1

(2S)-2-benzylazacyclopropane (73058-30-7) + hydrogen sulfide (7783-06-4) → (S)-2-amino-3-phenyl-1-propanethiol (116264-32-5)

Conditions	Yield
In ethanol	100%

chromium(III) oxide + hydrogen sulfide (7783-06-4) → chromium(III) sulphide

Conditions	Yield
With hydrogen 1000°C, 6 h;	100%
With H2 1000°C, 6 h;	100%
With hydrogen 500°C;	8%

hydrogen sulfide (7783-06-4) + copper (12775-96-1, 15158-11-9, 15721-63-8, 16941-75-6, 17493-86-6, 19498-52-3, 20499-83-6, 20499-84-7, 20499-85-8, 20499-86-9, 20573-10-8, 20573-11-9, 21595-51-7, 21595-52-8, 22206-52-6, 26445-28-3, 28959-95-7, 37362-93-9, 39417-05-5, 54603-16-6, 54603-23-5, 54603-32-6, 54603-40-6, 54603-48-4, 54603-81-5, 54603-89-3, 56316-56-4, 95985-91-4, 122297-32-9, 7440-50-8) → copper(II) sulfide

Conditions	Yield
In neat (no solvent) react. at 300 to 500 °C. for 1h;;	100%
In neat (no solvent) 1h at 25°C.;;	20%
With water; oxygen adsorption of H2S to Cu in the presence of O2 and H2O at 205 to 220°C;

zinc(II) chromite + hydrogen sulfide (7783-06-4) → zinc thiochromate(III)

Conditions	Yield
With hydrogen byproducts: H2O; very slow at 600°C, 100 % at 900°C;	100%
With H2 byproducts: H2O; very slow at 600°C, 100 % at 900°C;	100%
With hydrogen byproducts: H2O; after 6 h at 600°C conversion 28%, 100 % at 950°C;	28-100

hydrogen sulfide (7783-06-4) + Gallium trichloride (13450-90-3) → gallium trichloride*hydrogen sulfide (98773-19-4)

Conditions	Yield
In dichloromethane under N2, H2S introduced in soln. of GaCl3 in CH2Cl2 at -78°C for 15 min, further stirred for 1h at -78°C; evapn. of solvent at -20°C, dried in vac. for 3h at -20°C, elem. anal.;	100%

hydrogen sulfide (7783-06-4) + cadmium(II) nitrate → cadmium(II) sulphide

Conditions	Yield
With (NaPO3)6 or Na5P3O10 In water byproducts: HNO3; to a soln. of Cd salt (saturated with Ar, evacuated to a pressure of 35mbar) addn. of H2S gas under stirring (magnetic stirrer), the apparatusis evacuated to a pressure of 35 mbar;	100%
With sodium hexametaphosphate In water Cd(NO3)2 dissolved in neutral aq. 1E-2 M soln. of sodium hexametaphosphate, H2S passed above soln. for ca. 1 min;
With sodium hexametaphosphate In water passing H2S over surface of soln. of Cd(NO3)2 and sodium hexametaphosphate (1-2 h, stirring); expelling excess H2S (N2-stream); colloidal CdS obtained;
In water byproducts: HNO3; slow diffusion of H2S to 0.1 M salt soln. on oligoethylene oxide oleyl ether (room temp.); washing (Et2O/EtOH=50:50, sonicating), centrifugation;
Stage #1: cadmium(II) nitrate With alumina In water at 20℃; for 8h; Stage #2: at 450℃; for 5h; Calcination; Stage #3: hydrogen sulfide Temperature; Time;

cadmium(II) perchlorate + hydrogen sulfide (7783-06-4) → cadmium(II) sulphide

Conditions	Yield
In water byproducts: HClO4; to a soln. of Cd salt (saturated with Ar, evacuated to a pressure of 35mbar) addn. of H2S gas under stirring (magnetic stirrer), the apparatusis evacuated to a pressure of 35 mbar;	100%
With (NaPO3)6 or Na5P3O10 In water byproducts: HClO4; to a soln. of Cd salt (saturated with Ar, evacuated to a pressure of 35mbar) addn. of H2S gas under stirring (magnetic stirrer), the apparatusis evacuated to a pressure of 35 mbar;	100%
With sodium hydroxide In water soln. of Cd(ClO4)2 and (NaPO3)6 bubbled with Ar 15 min, pH adjusted to 8.0-8.3 by NaOH, H2S injected into the gas phase above the soln., stirring, pttn., pH increased to 10.5;

hydrogen sulfide (7783-06-4) + zinc(II) sulfate (7733-02-0) → zinc(II) sulfide

Conditions	Yield
In sulfuric acid feeding of H2S into a sulfuric soln. (10 % H2SO4) of ZnSO4 at 300 °C;;	100%
In sulfuric acid feeding of H2S into a sulfuric soln. (7.5 % H2SO4) of ZnSO4 at 300 °C;;	90%
In sulfuric acid feeding of H2S into a sulfuric soln. (10 % H2SO4) of ZnSO4 at 350 °C;;	80%

(RhCO)(Mn(CO)3)(((C6H5)2P)2CH2)2 (126925-92-6) + hydrogen sulfide (7783-06-4) → bis{μ-bis(diphenylphosphino)methane-P,P'}-tricarbonyl{carbonylrhodium(0)}-μ-sulfur-mangan(0) (134882-43-2)

Conditions	Yield
In dichloromethane (Ar), H2S bubbled for 5 min through soln.; after 30 min solvent removed in vacuum, dried in vacuum, elem. anal., MS;	100%

hydrogen sulfide (7783-06-4) + gallium(III) bromide (13450-88-9) → gallium tribromide*hydrogen sulfide (98773-20-7)

Conditions	Yield
In dichloromethane under N2, H2S introduced in soln. of GaBr3 in CH2Cl2 at -78°C for 15 min, further stirred for 1h at -78°C; evapn. of solvent at -20°C, dried in vac. for 3h at -20°C, elem. anal.;	100%

hydrogen sulfide (7783-06-4) + gallium(III) iodide (13450-91-4) → gallium triiodide*hydrogen sulfide (98773-21-8)

Conditions	Yield
In dichloromethane under N2, H2S introduced in soln. of GaI3 in CH2Cl2 at -78°C for15 min, further stirred for 1h at -78°C; evapn. of solvent at -20°C, dried in vac. for 3h at -20°C, elem. anal.;	100%

RuCl2(o-(diphenylphosphino)-N,N-dimethylaniline)(P(p-tolyl)3) (150392-41-9) + hydrogen sulfide (7783-06-4) → RuCl2(o-(diphenylphosphino)-N,N-dimethylaniline)(P(p-tolyl)3)(SH2)

Conditions	Yield
In neat (no solvent) absence of air and moisture; stirring under 1 atm H2S at 20°C for2 h; addn. of hexanes, stirring for 15 min, collection (filtration), drying (;	100%
In benzene absence of air and moisture; injecting H2S into soln. of Ru-complex; addn. of hexanes, stirring for 15 min, collection (filtration), drying (vac., overnight); elem. anal.;	95%

ammonium thiosulfate + hydrogen sulfide (7783-06-4) → water (7732-18-5) + sulfur (7704-34-9)

Conditions	Yield
In water Kinetics; Reduction of (NH4)2S2O3 (c=0.4 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa) in presence of Si-based catalyst.; Gravimetrical determination of S.;	A n/a B 99.7%
In water Kinetics; Reduction of (NH4)2S2O3 (c=1.0 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa) in presence of Si-based catalyst.; Gravimetrical determination of S.;	A n/a B 99.87%
In water Kinetics; Reduction of (NH4)2S2O3 (c=1.0 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa).; Gravimetrical determination of S.;	A n/a B 76.1%
In water Kinetics; Reduction of (NH4)2S2O3 (c=0.4 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa).; Gravimetrical determination of S.;	A n/a B 71.5%

ditechnetium penta-acetate + hydrogen sulfide (7783-06-4) → technetium disulfide

Conditions	Yield
at 450℃; for 1h;	99.8%

hydrogen sulfide (7783-06-4) + sulfur dioxide (7446-09-5) → water (7732-18-5) + sulfur (7704-34-9)

Conditions	Yield
In hydrogenchloride 20°C;satd. solns.; molar ratio 2 : 1; 15 % HCl soln., ,30 min;; S coagulated by addn. of gelatine or Al2(SO4)3;	A n/a B 99.7%
In hydrogenchloride 20°C;satd. solns.; molar ratio 2 : 1; 15 % HCl soln., ,30 min;; S coagulated by addn. of gelatine or Al2(SO4)3;	A n/a B 99.7%
In hydrogenchloride 20°C; satd. solns.; molar ratio 2 : 1; 3.5 % HCl soln.;; S coagulated by addn. of gelatine or Al2(SO4)3;;	A n/a B 93.5%

hydrogen sulfide (7783-06-4) + potassium hydroxide → potassium hydrosulfide

Conditions	Yield
In potassium hydroxide aq. KOH; KOH soln. saturation with H2S;	99.3%
In water in aq./ alc. soln., during evapn. of alcohol adding some water;
In potassium hydroxide byproducts: H2O; KOH soln. satn. with H2S;

hydrogen sulfide (7783-06-4) → lead(II) sulfide

Conditions	Yield
With Pb tartrate In water	99.27%
With Pb dithizonate In tetrachloromethane; water pptn.;;
With Pb EDTA In water pH = 2 - 8;; pptn.;;
With Pb tartrate In neat (no solvent) Kinetics; at 19°C;;
With Pb tartrate In neat (no solvent) Kinetics; at 50°C;;	0%

hydrogen sulfide (7783-06-4) + copper (12775-96-1, 15158-11-9, 15721-63-8, 16941-75-6, 17493-86-6, 19498-52-3, 20499-83-6, 20499-84-7, 20499-85-8, 20499-86-9, 20573-10-8, 20573-11-9, 21595-51-7, 21595-52-8, 22206-52-6, 26445-28-3, 28959-95-7, 37362-93-9, 39417-05-5, 54603-16-6, 54603-23-5, 54603-32-6, 54603-40-6, 54603-48-4, 54603-81-5, 54603-89-3, 56316-56-4, 95985-91-4, 122297-32-9, 7440-50-8) → copper sulfide

Conditions	Yield
In neat (no solvent) byproducts: H2; react. of Cu-powder ("natural copper C") in liquid H2S;;	99%
In neat (no solvent) byproducts: H2; react. of Cu-powder ("natural copper C") in liquid H2S;;	99%
In neat (no solvent) byproducts: H2; investigation of equilibrium at 610 to 910°C;;

PdI2(bis(diphenylphosphino)methane)2 + hydrogen sulfide (7783-06-4) → Pd2I2(μ-S)(dpm)2

Conditions	Yield
aluminium oxide In dichloromethane byproducts: HI; (Ar); stirring (4 h); filtration, washing (CH2Cl2, MeOH and CH2Cl2), drying (vac.);	99%

Pd(2+)*(P(C6H5)2CH2P(C6H5)2)*2Cl(1-)=PdCl2(P(C6H5)2CH2P(C6H5)2) + hydrogen sulfide (7783-06-4) → Pd2Cl2S(P(C6H5)2CH2P(C6H5)2)2

Conditions	Yield
aluminium oxide In dichloromethane byproducts: HCl; (Ar); stirring (4 h); filtration, washing (CH2Cl2, MeOH and CH2Cl2), drying (vac.);	99%
alumina byproducts: HCl; room temp.;

cis-sulfhydrylmethyl[bis(dicyclohexylphosphino)ethane]platinum(II) (220214-03-9) + hydrogen sulfide (7783-06-4) → cis-disulfhydryl[bis(dicyclohexylphosphino)ethane]platinum(II) (220214-17-5)

Conditions	Yield
In benzene-d6 byproducts: CH4; H2S-atmosphere, NMR tube; room temp. (20 min); not isolated, detd. by NMR spectroscopy;	99%

methoxide(nitrosyl)(meso-tetra-p-tolylporphyrinato)ruthenium(II) (179930-23-5) + hydrogen sulfide (7783-06-4) → sulfhydro(nitrosyl)(meso-tetra-p-tolylporphyrinato)ruthenium(II) (215526-07-1)

Conditions	Yield
In toluene absence of air and moisture; bubbling H2S for 10 min; evapn. (vac.), recrystn. (CH2Cl2/hexane); elem. anal.;	99%

[Cu(1-(2-aminoethyl)biguanidine)Cl2]*H2O + hydrogen sulfide (7783-06-4) → copper(II) sulfide

Conditions	Yield
In water passing H2S gas;	99%

[Pt(1,1′-dimethyl-3,3′-ethylene-4-diimidazolylidene)(SH)2] + hydrogen sulfide (7783-06-4) → [Pt(1,1′-dimethyl-3,3′-ethylene-4-diimidazolylidene)(S4)]

Conditions	Yield
With O2 In acetonitrile oxidized by O2;	99%
With O2 In methanol oxidized by O2;	99%

hydrogen sulfide (7783-06-4) + oxygen (80937-33-3) → sulfur (10544-50-0) + Sulfate (14808-79-8) + sulfite(2-) (14265-45-3)

Conditions	Yield
With air; iron(III) chloride In water H2S and air were bubbled into soln. FeCl3 in N-methylpyrrolidinone-H2O (95:5) at room temp. for 300 h;	A 98.72% B 0.09% C 0.02%
With air; Iron(III) nitrate nonahydrate In water H2S and air were bubbled into soln. Fe(NO3)3*9H2O in N-methylpyrrolidinone-H2O (95:5) at room temp. for 24 h;	A 63.03% B n/a C n/a
With air; iron(III) chloride In further solvent(s) H2S and air were bubbled into soln. FeCl3 in N-methylpyrrolidinone at room temp. for 100-313 h; sulfur was filtered off;
With air; iron(III) chloride hexahydrate In water H2S and air were bubbled into soln. FeCl3*6H2O in N-methylpyrrolidinone-H2O (95:5) at room temp. for 198 h;
With air; iron(III) chloride In water H2S and air were bubbled into soln. FeCl3 in N-methylpyrrolidinone-H2O (95:5) at room temp. for 300 h;

Pd2Cl2S(P(C6H5)2CH2P(C6H5)2)2 + hydrogen sulfide (7783-06-4) → Pd2Br2(μ-S)(dpm)2

Conditions	Yield
aluminium oxide In dichloromethane byproducts: HBr; (Ar); stirring (4 h); filtration, washing (CH2Cl2, MeOH and CH2Cl2), drying (vac.);	98%

Upstream product

• 7647-01-0 hydrogenchloride 
• 51793-90-9 1H-3-OXA-1-AZA-CYCLOPENTA[A]NAPHTHALENE-2-THIONE 
• 409110-30-1 N-(4,6-diamino-pyrimidin-5-yl)-thioformamide 
• 6453-39-0 5,5-dimethyl-2-thioxo-4-oxazolidinone 
• 29181-66-6 2-amino-thiazole-4,5-dione-5-oxime 
• 860754-37-6 5-nitroso-4-phenyl-2-p-tolylamino-thiazole 
• 4271-09-4 2,2'-benzothiazolyl 
• 10034-85-2 hydrogen iodide 
• 20940-07-2 3-phenyl-2H-benzo[b][1,4]thiazine 
• 33776-96-4 4,6-dithioxo-[1,3,5]triazinan-2-one 
• 638-16-4 trithiocyanuric acid 
• 767-17-9 4,6-diamino-1H-[1,3,5]triazine-2-thione 
• 109-97-7 pyrrole 
• 271-89-6 1-benzofurane 

Downstream Products

• 90000-67-2 2,6-dimethyl-4-mercaptopyridine 
• 96-27-5 rac-3-sulfanylpropane-1,2-diol 
• 507-09-5 thioacetic acid 
• 807335-97-3 bis-(3-oxo-1-phenyl-phthalan-1-yl)-sulfide 
• 62-53-3 aniline 
• 95-54-5 1,2-diamino-benzene 
• 14393-25-0 N,N'-dimethyl-1,5-dithia-3,7-diazacyclooctane 
• 74-89-5 methylamine 
• 645-54-5 2-phenylthioacetamide 
• 104-94-9 4-methoxy-aniline 
• 519-73-3 triphenylmethane 
• 108-80-5 isocyanuric acid 
• 29094-98-2 triphenyl-2H-[1,2,3,6]thiatriazine 
• 110-01-0 thiophene 

Relevant articles and documents

Factors affecting the hydrogen reduction kinetics of CsHSO4

The hydrogen reduction of CsHSO4, including in the presence of catalysts, is studied. The main factors affecting the rate of the process are determined. A possible reaction mechanism through the surface hydrated phase is discussed. Experiments

Reaction between sulfur hexafluoride and hydrogen iodide

-

-

-

-

-

LATTICE VIBRATION SPECTRA Part LXIV. Raman spectroscopic study of lithium hydrogensulfide LiSH: dynamic disorder and order-disorder phase transition

Raman spectra (4000-50 cm-1) of lithium hydrogensulfide are recorded in the range from 70 to 300 K.The temperature dependence of frequencies and halfwidths of the SH- stretching and librational modes yields clear evidence for a disorder-order phase transition at 222 K and thermally activated dynamic disorder of the SH- ions in the room temperature polymorph.Down to 70 K the increasing splitting of the in-plane libration can be interpreted by a Landau-type order parameter.This splitting reflects increasing dynamic interactions (factor group splitting) of adjacent (in ) SH- ions due to the ordering process.The halfwidths of the stretching and out-of-plane librational modes exhibits an Arrhenius-type behaviour.The activation energies derived are 1.9 kJ mol-1 for both vibrations.The activation temperature (230 K) is in good agreement with that of the change of the specific heat at 228 K.The order mechanism and a plausible structure of the ordered phase below 222 K are discussed.

Synthesis and X-ray diffraction characterization of FeNdSbS4, an analog of berthierite

A rare-earth-containing analog of the mineral berthierite, with the composition FeNdSbS4, was synthesized for the first time. FeNdSbS4 is isostructural with FeSb2S4 and crystallizes in orthorhombic symmetry (sp. gr. Pbam, Z = 4) with lattice parameters a = 11.395 A, b = 14.136 A, and c = 3.747 A.

Sulfur-33 Isotope Tracing of the Hydrodesulfurization Process: Insights into the Reaction Mechanism, Catalyst Characterization and Improvement

The novel approach based on 33S isotope tracing is proposed for the elucidation of hydrodesulfurization (HDS) mechanisms and characterization of molybdenum sulfide catalysts. The technique involves sulfidation of the catalyst with 33S-isotope-labeled dihydrogen sulfide, followed by monitoring the fate of the 33S isotope in the course of the hydrodesulfurization reaction by online mass spectrometry and characterization of the catalyst after the reaction by temperature-programmed oxidation with mass spectrometry (TPO-MS). The results point to different pathways of thiophene transformation over Co or Ni-promoted and unpromoted molybdenum sulfide catalysts, provide information on the role of promoter and give a key for the design of new efficient HDS catalysts.

Polymersome Wound Dressing Spray Capable of Bacterial Inhibition and H2S Generation for Complete Diabetic Wound Healing

Diabetic wounds are difficult to heal due to recurrent bacterial infection, decreased proliferation, and migration of epidermal and endothelial cells. This is related to impaired leukocyte function and low blood concentrations of H2S in diabetic patients. Herein, an antibacterial polymersome-based wound dressing spray was demonstrated for complete diabetic wound healing. The designed polymersome was self-assembled from poly(?-caprolactone)24-block-poly[lysine15-stat-(S-aroylthiooxime)23] [PCL24-b-P(Lys23-stat-SATO15)], where PCL is the hydrophobic membrane-forming block and P(Lys-stat-SATO) acts as a hydrophilic stabilizer block. The polymersomes can penetrate and kill Gram-positive and Gram-negative bacteria because of the electrostatic interaction induced by the antibacterial P(Lys23-stat-SATO15) block. Furthermore, the SATO segments are capable of long-term H2S generation by reacting with cysteine (up to 12 h). This promotes proliferation, migration of epidermal and endothelial cells, and angiogenesis. Overall, this polymersome-based wound dressing spray acts as a bacterial inhibitor and H2S generator and offers a fresh insight into the effective treatment of diabetic wounds.

Biochemical Characterization, Phytotoxic Effect and Antimicrobial Activity against Some Phytopathogens of New Gemifloxacin Schiff Base Metal Complexes

String of Fe(III), Cu(II), Zn(II) and Zr(IV) complexes were synthesized with tetradentateamino Schiff base ligand derived by condensation of ethylene diamine with gemifloxacin. The novel Schiff base (4E,4′E)-4,4′-(ethane-1,2-diyldiazanylylidene)bis{7-[(4Z

Mechanochemical synthesis of air-stable hexagonal Li4SnS4-based solid electrolytes containing LiI and Li3PS4

Sulfide solid electrolytes with high ionic conductivity and high air stability must be developed for manufacturing sulfide all-solid-state batteries. Li10GeP2S12-type and argyrodite-type solid electrolytes exhibit a high ionic conductivity of ～10-2 S cm-1 at room temperature, while emitting toxic H2S gas when exposed to air. We focused on hexagonal Li4SnS4 prepared by mechanochemical treatment because it comprises air-stable SnS4 tetrahedra and shows higher ionic conductivity than orthorhombic Li4SnS4 prepared by solid-phase synthesis. Herein, to enhance the ionic conductivity of hexagonal Li4SnS4, LiI was added to Li4SnS4 by mechanochemical treatment. The ionic conductivity of 0.43LiI·0.57Li4SnS4 increased by 3.6 times compared with that of Li4SnS4. XRD patterns of Li4SnS4 with LiI showed peak-shifting to lower angles, indicating that introduction of I-, which has a large ionic radius, expanded the Li conduction paths. Furthermore, Li3PS4, which is the most air-stable in the Li2S-P2S5 system and has higher ionic conductivity than Li4SnS4, was added to the LiI-Li4SnS4 system. We found that 0.37LiI·0.25Li3PS4·0.38Li4SnS4 sintered at 200 °C showed the highest ionic conductivity of 5.5 × 10-4 S cm-1 at 30 °C in the hexagonal Li4SnS4-based solid electrolytes. The rate performance of an all-solid-state battery using 0.37LiI·0.25Li3PS4·0.38Li4SnS4 heated at 200 °C was higher than those obtained using Li4SnS4 and 0.43LiI·0.57Li4SnS4. In addition, it exhibited similar air stability to Li4SnS4 by formation of LiI·3H2O in air. Therefore, addition of LiI and Li3PS4 to hexagonal Li4SnS4 by mechanochemical treatment is an effective way to enhance ionic conductivity without decreasing the air stability of Li4SnS4.