| GHS-Einstufung | DangerH220: Extremely flammable gas [Danger Flammable gases]P203, P210, P222, P260, P271, P273, P280, P284, P304+P340, P316, P320, P377, P381, P391, P403, P403+P233, P405, and P501 (click each P-code to see the statement)H220 (100%): Extremely flammable gas [Danger Flammable gases]P203, P210, P222, P260, P271, P273, P280, P284, P304+P340, P316, P320, P377, P381, P391, P403, P403+P233, P405, P410+P403, and P501 (click each P-code to see the statement) |
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| Hazards Identification | Toxic/poison by inhalation (TIH/PIH) |
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| Regulatorische Informationen | Chemical: Hydrogen sulfide (H2S)Hazard Traits - Environmental toxNeurotoxicityRespiratory ToxicityCommission Regulation (EC) No 1565/2000 (Repealed by Com. Implementing Reg. (EU) No 872/2012)Status: Active Update: 01-10-2020 https://echa.europa.eu/registration-dossier/-/registered-dossier/14463Hydrogen sulphide: HSNO Approval: HSR001061 Approved with controlsThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.) |
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| Weitere Sicherheitsinformationen | IMAP assessments - Hydrogen sulfide (H2S): Human health tier I assessment |
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| DOT-Kennzeichnung | Poison Gas Flammable Gas |
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| Brandgefahren | Compound is heavier than air and may travel a considerable distance to source of ignition and flash back. It forms explosive mixtures with air over a wide range. Also reacts explosively with bromine pentafluoride, chlorine trifluoride, nitrogen triiodide, nitrogen trichloride, oxygen difluoride, and phenyl diazonium chloride. When heated to decomposition, it emits highly toxic fumes of oxides of sulfur. Incompatible with many materials including strong oxidizers, metals, strong nitric acid, bromine pentafluoride, chlorine trifluoride, nitrogen triiodide, nitrogen trichloride, oxygen difluoride and phenyl diazonium chloride. Avoid physical damage to containerssources of ignitionstorage near nitric acid, strong oxidizing materials, and corrosive liquids or gases. (EPA, 1998)· Flammable/combustible material.· HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.· These materials are extremely flammable. |
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| Brandpotenzial | FLAMMABLE GAS. LOW IGNITION ENERGY. |
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| Gesundheitsgefahren | Exposure to very high concentrations causes immediate death. Also death or permanent injury may occur after very short exposure to small quantities. It acts directly upon the nervous system resulting in paralysis of respiratory centers. (EPA, 1998)· Fire may produce irritating and/or toxic gases.· TOXICmay be fatal if inhaled, ingested or absorbed through skin.Extremely Hazardous.· May cause toxic effects if inhaled or absorbed through skin. |
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| Gefahrenübersicht | Hydrogen sulfide (H2S) occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs. It can also result from bacterial breakdown of organic matter. It is also produced by human and animal wastes. Bacteria found in your mouth and gastrointestinal tract produce hydrogen sulfide from bacteria decomposing materials that contain vegetable or animal proteins. Hydrogen sulfide can also result from industrial activities, such as food processing, coke ovens, kraft paper mills, tanneries, and petroleum refineries. Hydrogen sulfide is a flammable, colorless gas with a characteristic odor of rotten eggs. It is commonly known as hydrosulfuric acid, sewer gas, and stink damp. People can smell it at low levels.CNS injury is immediate and significant after exposure to hydrogen sulfide. At high concentrations, only a few breaths can lead to immediate loss of consciousness, coma, respiratory paralysis, seizures, and death. . . . Hydrogen sulfide is a mucous membrane and respiratory tract irritantpulmonary edema, which may be immediate or delayed, can occur after exposure to high concentrations. [ATSDR Medical Management] Like cyanide, causes cellular asphyxiationAlso a mucous membrane irritantIDLH = 100 ppmPulmonary edema at 300-500 ppmRapidly fatal at 600-800 ppm[Olson, p. 271] H2S is heavier than airit displaces air in confined spaces. 80 fatalities were recorded by OSHA from 1984-94. Prevent deaths by using H2S detection equipment, air-supplied respirators, and confined space safety training. [Fuller DC, Suruda AJ. J Occup Environ Med. 200042:939-942] Possible frostbite from contact with liquid[NIOSH] The following chemicals can release H2S when spilled in water: Sulfur chloridesPhosphorus pentasulfideand Sodium, Potassium, Calcium & Zinc hydrosulfite. [ERG 2016] Measuring thiosulfate in urine allows health care providers to identify nonfatal H2S exposure, allowing life-saving prevention opportunities. Measuring thiosulfate in blood is the preferred method to confirm death from H2S exposure. [PMID 24164756] See the Process, Toxic Gas from Spilling Chemical in Water. Hydrogen sulfide is fibrogenic to the lungs in the context of an acute inhalation exposure complicated by bronchiolitis obliterans.Thiols (or mercaptans, an older term) are a group of chemical compounds with structural similarity to alcohols, e.g., ethanethiol (C2H5SH) resembles ethanol (C2H5OH). Some thiols are used as warning gases. Their strong and repulsive odor can warn users of an explosive gas that is leaking into the air. [Hawley] See Benzenethiol, n-butyl mercaptan, methanethiol, ethanethiol and other thiols in this database. The thiols with higher vapor pressures can be acutely toxic in spill accidents causing respiratory irritation, coma, and death. The thiols can, like hydrogen sulfide, produce CNS injury and respiratory paralysis. [ACGIH] See Methyl mercaptan, Benzenethiol (Phenyl mercaptan), and 2-Methyl-2-heptanethiol all classified as TIH (Toxic Inhalation Hazard). [ERG 2016]. |
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| DOT-Nummer und Handbuch | 2448 1331228 1311053 1173336 1303071 131 |
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| Reaktive Gruppe | Sulfides, Inorganic |
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| EG-Einstufung | Symbol: F+, T+, NR: 12-26-50S: (1/2)-9-16-36-38-45-61 |
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| UN-Einstufung | UN Hazard Class: 2.3UN Subsidiary Risks: 2.1 |
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| Brandbekämpfung | Stop flow of gas. Use water to keep fire-exposed containers cool and to protect men effecting the shut-off. Keep unnecessary people awayisolate hazard area and deny entry. Stay upwindkeep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and special protective clothing. Evacuate area endangered by gas. Move container from fire area. Stay away from ends of tanks. Withdraw immediately in case of rising sound from venting safety device or any discoloration on tank due to fire. Cool containers with water using unmanned device until well after the fire is out. Isolate for one-half mile in all directions if tank car or truck is involved in fire.Shut off supplyif not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with water spray, dry powder. In case of fire: keep cylinder cool by spraying with water. |
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| Erste-Hilfe-Maßnahmen | Administration of oxygen may be needed. Fresh air, rest. Half-upright position. Artificial respiration may be needed. No mouth-to-mouth artificial respiration. Refer immediately for medical attention.ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention .First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. |
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| Freisetungsmaßnahmen | · CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. |
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| Erste Hilfe | Warning: Caution is advised. Vital signs should be monitored closely.General First Aid: |
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| Sichere Lagerung | Fireproof. Separated from strong oxidants. Cool. Keep in a well-ventilated room. Install continous monitoring system with alarm. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access. |
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| Firefighting Hazards | HEAVIER THAN AIR ... & MAY TRAVEL CONSIDERABLE DISTANCE TO SOURCE OF IGNITION & FLASHBACK. |
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| Expositionsschutz und Persönliche Schutzausrüstung | · Wear positive pressure self-contained breathing apparatus (SCBA).TIH (Toxic Inhalation Hazard) - Term used to describe gases and volatile liquids that are toxic when inhaled. Some are TIH materials themselves, e.g., chlorine, and some release TIH gases when spilled in water, e.g., chlorosilanes. [ERG 2016]. |
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| Brandbekämpfungsverfahren | Stop flow of gas before extinguishing fire. Use water spray, dry chemical, or carbon dioxide. Use water sprat to keep fire-exposed containers cool.STOP FLOW OF GAS. USE WATER TO KEEP FIRE EXPOSED CONTAINERS COOL & TO PROTECT MEN EFFECTING SHUT OFF.If material is on fire or involved in fire: Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Apply water from as far a distance as possible. Cool all affected containers with flooding quantities of water. Use water spray to knock-down vapors.To fight fire, stop flow of gas. |
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| Lagerbedingungen | Store in a cool, dry, well-ventilated location. Separate from oxidizable materials. |
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| Reinigungsverfahren | Eliminate all ignition sources. Approach release from upwind. Stop or control the leak, if this can be done without undue risk. Use water spray to cool and disperse vapors, protect personnel, and dilute spills to form nonflammable mixtures. Control runoff and isolate discharge material for proper disposal.1) REMOVE ALL IGNITION SOURCES. 2) VENTILATE AREA OF SPILL OR LEAK TO DISPERSE GAS. 3) IF IN GASEOUS FORM, STOP FLOW OF GAS. IF SOURCE OF LEAK IS CYLINDER & ... CANNOT BE STOPPED IN PLACE, REMOVE THE LEAKING CYLINDER TO A SAFE PLACE IN THE OPEN AIR, & REPAIR THE LEAK OR ALLOW THE CYCLINDER TO EMPTY. 4) IF IN LIQ FORM, ALLOW TO VAPORIZE.METHODS FOR THE BIOLOGICAL TREATMENT OF ACID MINE DRAINAGE WERE EVALUATED. HYDROGEN SULFIDE PRODUCED BY SULFATE REDUCTION CAN POTENTIALLY REACT WITH METALS IN SOLUTION TO FORM METAL SULFIDE PRECIPITATES. THE UTILITY OF A PILOT PLANT DESIGN INCORPORATING ANAEROBIC DIGESTION, SULFATE REDUCTION, AERATION AND FINAL CLARIFICATION AND SETTLING WAS DEMONSTRATED.Environmental considerations: Land spill: Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Neutralize with agricultural lime (CaO), crushed limestone (CaCO3) or sodium bicarbonate (NaHCO3).For more Cleanup Methods (Complete) data for HYDROGEN SULFIDE (6 total), please visit the HSDB record page. |
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| Freisetung ohne Brand | Excerpt from ERG Guide 117 [Gases - Toxic - Flammable (Extreme Hazard)]: |
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| Entsorgungsverfahren | Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number U135, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.A potential candidate for rotary kiln incineration at a temperature range of 820 to 1,600 °C and residence times of seconds for liquids and gases, and hours for solids.A potential candidate for fluidized bed incineration at a temperature range of 450 to 980 °C and residence times of seconds for liquids and gases, and longer for solids. |
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| Toxikologische Informationen | CDC-ATSDR Toxicological Profile |
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| Treatment | Treatment involves immediate inhalation of amyl nitrite, injections of sodium nitrite, inhalation of pure oxygen, administration of bronchodilators to overcome eventual bronchospasm, and in some cases hyperbaric oxygen therapy (HBO). HBO therapy has anecdotal support and remains controversial. (L1139) |
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| Wechselwirkungen | Asymmetric dimethylarginine (ADMA), an endogenous nitric oxide synthase (NOS) inhibitor, is profoundly protective against 1-methy-4-phenylpyridinium ion (MPP+)-induced neurotoxicity. Reactive oxygen species (ROS) overproduction contributes to the neurotoxicity of MPP+while hydrogen sulfide (H2S) is a pivotal endogenous antioxidant. This study is to assess the potential role of endogenous H2Sin the neuroprotection of ADMA against MPP+ induced toxicity in PC12 cells. We showed that ADMA prevented MPP+-induced inhibition of endogenous H2Sgeneration through inhibiting the down-regulation of cystathionine-beta-synthetase (CBS, the major enzyme responsible for endogenous H?S generation in PC12 cells) expression and activity elicited by MPP+. ADMA obviously attenuated MPP+-triggered accumulation of intracellular ROS, dissipation of mitochondrial membrane potential (MMP), release of cytochrome c (Cyt-c), and down regulation of Bcl-2 protein expression in PC12 cells. Inhibition of CBS activity by amino-oxyacetate and CBS silencing with a short hairpin RNA vector targeting rat CBS gene reversed the protective action of ADMA against MPP+ caused cytotoxicity, ROS overproduction, and MMP loss in PC12 cells. These results indicate that the protection of ADMA against MPP+ mediated neurotoxicity involves the melioration of MPP+ induced inhibition of endogenous H2S generation. Our findings suggest that modulation of H2S production provide new therapeutic targets for the treatment of neurodegenerative disease, such as Parkinson's disease.Pregnant rats were exposed to 0, 100, 200, 400 or 800 ppm of carbon disulfide (CS2), 100 ppm hydrogen sulfide (H2S) alone or in combination with 400 or 800 ppm CS2, 6 hr/day during days 6-20 gestation. Maternal reproduction and fetal parameters were evaluated on gestational day 21. Treatment with 100 or 200 ppm CS2 or with 100 ppm H2S caused no maternal toxicity or adverse effects on the developing embryo or fetus. Exposure to 400 or 800 ppm CS2 resulted in a low incidence of club foot and in a significant reduction of maternal weight gain. Significant incr in unossified sternebrae occurred at 800 ppm CS2 and reduction of fetal body weight at 400 and 800 ppm CS2. The latter effect was enhanced by combination with 100 ppm H2S. ... At levels of exposure associated with maternal toxicity, CS2 leads to an incr in incidence of club foot and to fetal toxicity which is enhanced by simultaneous exposure to H2S.Hydrogen sulfide ... is produced endogenously in mammalian tissues from L-cysteine mainly by two pyridoxal-5'-phosphate dependent enzymes, cystathionine beta-synthetase and cystathionine gamma-lyase. ... Cystathionine beta-synthetase in the brain produces H2S, and that H2S facilitates the induction of hippocampal long term potentiation by enhancing NMDA receptor activity. ... mRNA for another H2S producing enzyme, cystathionine gamma-lyase is expressed in the ileum, portal vein and thoracic aorta. The ileum also expresses cystathionine beta-synthetase mRNA. These tissues produce H2S, and this production is blocked by cystathionine beta-synthetase and cystathionine gamma-lyase specific inhibitors. Although exogenously applied H2S alone relaxed these smooth muscles, much lower concn of H2S greatly enhanced the smooth muscle relaxation induced by NO in the thoracic aorta. These observations suggest that the endogenous H2S may regulate smooth muscle tone in synergy with NO. |
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| Zielorgane | Neurological (Nervous System), Respiratory (From the Nose to the Lungs)Eyes, respiratory system, central nervous system |
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| Gesundheitliche Auswirkungen | Hydrogen sulfide is a highly toxic and flammable gas. Hydrogen sulfide is considered a broad-spectrum poison, meaning that it can poison several different systems in the body, although the nervous system is most affected. The toxicity of hydrogen sulfide is comparable with that of hydrogen cyanide. (L1139) |
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| Ökotoxizitätswerte | EC50Species: Gammarus pseudolimnaeus (Scud) length 11 mmConditions: freshwater, flow through, 15 °C, pH 7.5, hardness 220 mg/L CaCO3, alkalinity 140 mg/L CaCO3, dissolved oxygen 4 mg/LConcentration: 62 ug/L for 48 hrEffect: intoxication, immobilizationConditions: freshwater, flow through, 15 °C, pH 7.5, hardness 220 mg/L CaCO3, alkalinity 140 mg/L CaCO3, dissolved oxygen 6 mg/LConcentration: 71 ug/L for 48 hrConditions: freshwater, flow through, 10 °C, pH 7.5, hardness 220 mg/L CaCO3, alkalinity 140 mg/L CaCO3, dissolved oxygen 6 mg/LConcentration: 95 ug/L for 48 hrConcentration: 42 ug/L for 10 daysFor more Ecotoxicity Values (Complete) data for HYDROGEN SULFIDE (35 total), please visit the HSDB record page. |
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| Umweltverhalten | TERRESTRIAL FATE: Hydrogen sulfide gas has been observed to partition to soils(1). For example, when hydrogen sulfide gas was passed over six air-dried and moist (50% field capacity) soils, 15.4-65.2 mg/g and 11.0-65.2 mg/g of hydrogen sulfide rapidly adsorbed to the dry and moist soils, respectively(1). Neither the capacity or rate of sorption was correlated to soil pH, organic matter content, or clay contentsterile controls ruled out the involvement of microorganisms(1)it was suggested that adsorption to soil surfaces might be an environmental sink for gaseous hydrogen sulfide(1). Volatilization of hydrogen sulfide from moist soil surfaces is expected to be an important fate process(SRC) given a Henry's Law constant of 0.0098 atm-cu m/mole at 25 °C(2). Hydrogen sulfide is a gas at ambient temperatures(3) and expected to volatilize from dry soil surfaces(SRC)however, hydrogen sulfide gas can adsorb to both moist and dry soil surfaces(1) which may attenuate the rate of volatilization(SRC). Hydrogen sulfide can be consumed by bacteria found in soil and water that oxidize hydrogen sulfide to elemental sulfur(4).AQUATIC FATE: Volatilization of hydrogen sulfide from water surfaces is expected(1) based upon a Henry's Law constant of 0.0098 atm-cu m/mole at 25 °C(2). Using this Henry's Law constant and an estimation method(1), volatilization half-lives for a model river and model lake are 1.8 hours and 2.3 days, respectively(SRC). Hydrogen sulfide is a weak base and has two pKa values of pKa1 = 7.04 and pKa2 = 11.96(3) which indicate some dissociation at environmental pHs(4). At pH 5-6, the water-air transfer rate was found to behave like an unreactive gas, but as the pH increases to pH10, the transfer rate was enhanced and nearly 200 times faster at pH10 than pH 5(4). The rate of oxidation of hydrogen sulfide in air-saturated natural waters was measured over a temperature range (5-65 °C), pH range (1-12) and ionic strength(5)at 25 °C, the half-life was about 50 hours in water and 26 hours in seawater (pH8)(5). Hydrogen sulfide does not have bioaccumulation or food chain contamination potential(6). Hydrogen sulfide can be consumed by bacteria found in soil and water that oxidize hydrogen sulfide to elemental sulfur(7).ATMOSPHERIC FATE: At atmospheric pressures, hydrogen sulfide is a gas above its boiling point of -60.33 °C(1), and therefore, will exist as a gas in the ambient environment(SRC). Gas-phase hydrogen sulfide is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC)the half-life for this reaction in air is estimated to be 3.3. days(SRC), calculated from its rate constant of 4.8X10-12 cu cm/molecule-sec at 25 °C(2). The reaction of hydrogen sulfide with hydroxyl radicals in air yields H20 and the SH radical(2) which is further oxidized to SO, then sulfur dioxide, and ultimately sulfate compounds(3). The gas-phase reaction of hydrogen sulfide with nitrate radicals in night-time air is relative slow and not competitive with hydroxyl radicals(4)the rate constant for reaction with nitrate radicals is reported as <8X10-16 cu cm/molecule-sec at 25 °C(5). Vapor-phase reaction with ozone is also relatively slow(SRC) based on a rate constant <2X10-20 cu cm/molecule-sec at 25 °C(5). Hydrogen sulfide does not absorb solar radiation reaching the troposphere(6) and therefore is not expected to be susceptible to direct photolysis by sunlight(SRC).Atmospheric Fate: The lifetime of hydrogen sulfide (H2S) is affected by ambient temperature and other atmospheric variables including humidity, sunshine, and presence of other pollutants. The decreased temperatures and decreased levels of hydroxide in northern regions (e.g. Alberta, Canada) in winter increase the residence time of H2S in air.Once released into the atmosphere, hydrogen sulfide will behave like many other gaseous pollutants and be dispersed and eventually removed. Residence times in the atmosphere range from about one day to more than 40 days, depending upon season, latitude, and atmospheric conditions. |
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| Lebensmitteluntersuchungswerte | Hydrogen sulfide was qualitatively detected in Beaufort cheese volatiles(1). Steamed crab meat contained hydrogen sulfide concentrations of 45.7 to 105.0 ug/kg(2). |
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| Unerwünschte Wirkungen | Other Poison - Chemical Asphyxiant |
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| Expositionspfade | The substance can be absorbed into the body by inhalation.inhalation, skin and/or eye contactOraldermal |
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| Toxizitätsübersicht | Although very pungent at first, hydrogen sulfide quickly deadens the sense of smell, so potential victims may be unaware of its presence until it is too late. Hydrogen sulfide forms a complex bond with iron in the mitochondrial cytochrome enzymes, thereby blocking oxygen from binding and stopping cellular respiration. (L1139) |
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| Ökotoxizitätsauszüge | /AQUATIC SPECIES/ Exposure of channel catfish to 0.5 mg/L hydrogen sulfide at 20 °C resulted in hyperpnea, followed by apnea and respiratory arrest./AQUATIC SPECIES/ The effects of hydrogen sulfide (H2S) were tested in three ecotoxicological tests in order to evaluate its confounding potential in assessment of pore water and groundwater toxicity. The luminescent bacteria Vibrio fischeri, the water flea Daphnia magna, and the microalgae Scenedesmus vacuolatus often are part of a biotest battery. A new technique for the synthesis of hydrogen sulfide solutions of defined concentrations using an electrochemical generator instead of sodium sulfide solutions was used. Because hydrogen sulfide is volatile, the loss rate of H2S was studied over time to enable estimation of the mean test concentrations over the whole test duration. Loss rates were calculated to be 13 + or - 6% after 30 min, and 39 + or - 11% and 43 + or - 16% after a 24- and 48-hr exposure time, respectively. Sensitivities of the test organisms in terms of median effective concentration (EC50), corrected for the above loss rates, varied from 0.28 to 0.0036 and 0.055 mM for the luminescent bacteria, the crustacea, and the algae, respectively. A species-sensitivity distribution using EC and mean lethal concentration literature data for marine and freshwater crustaceans and phytoplankton showed a medium sensitivity of the water flea D. magna, though the bacteria V. fischeri and the algae S. vacuolatus were among the least-sensitive group of organisms. This demonstrates that only the algae and the bacteria are easy to use in the assessment of toxicity of matrices with H2S concentrations above 0.06 mM./PLANTS/ /Ten species of weeds 3 to 6 weeks of age were/ fumigated with 100 to 500 ppm hydrogen sulfide for four hours. /Results suggested that/ differences in susceptibility to injury /existed/ and ... that younger plants were more sensitive to damage than older ones. /Data also suggested/ that increases in temperature exacerbated the damage, as did dry soil. |
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| RCRA-Anforderungen | U135As stipulated in 40 CFR 261.33, when hydrogen sulfide, as a commercial chemical product or manufacturing chemical intermediate or an off-specification commercial chemical product or a manufacturing chemical intermediate, becomes a waste, it must be managed according to Federal and/or State hazardous waste regulations. Also defined as a hazardous waste is any residue, contaminated soil, water, or other debris resulting from the cleanup of a spill, into water or on dry land, of this waste. Generators of small quantities of this waste may qualify for partial exclusion from hazardous waste regulations (40 CFR 261.5). |
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| CERCLA-Meldepflichtmengen | Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 100 lb or 45.4 kg. The toll free number of the NRC is (800) 424-8802. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b).Releases of CERCLA hazardous substances are subject to the release reporting requirement of CERCLA section 103, codified at 40 CFR part 302, in addition to the requirements of 40 CFR part 355. Hydrogen sulfide is an extremely hazardous substance (EHS) subject to reporting requirements when stored in amounts in excess of its threshold planning quantity (TPQ) of 500 lbs. |
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| Clean Water Act Anforderungen | Hydrogen sulfide is designated as a hazardous substance under section 311(b)(2)(A) of the Federal Water Pollution Control Act and further regulated by the Clean Water Act Amendments of 1977 and 1978. These regulations apply to discharges of this substance. This designation includes any isomers and hydrates, as well as any solutions and mixtures containing this substance. |
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| DHS Chemicals of Interest (COI) | Hydrogen sulfide11000023.7345Toxic chemical that can be released at a facility. |
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| Landesrichtlinien für Trinkwasser | (ME) MAINE 80 ug/l(WI) WISCONSIN 30 ug/l |
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