Inhalation at high concentrations can result in dyspnea, hypoventilation, seizures, and death. Flush contaminated skin with plenty of water. Read less. methyl mercaptan: formed in the intestines by bacterial action on sulfur-containing proteins and appears in urine after ingestion of asparagus (contributing to the characteristic odor); also used in the manufacture of various organic sulfur-containing pesticides and fungicides. The chemical formula for methanethiol is CH3SH; Methanethiol (also known as methyl mercaptan) is a colorless gas with a smell like rotten cabbage. The Methyl mercaptan participates in analogous equilibria. Products. View chapter Purchase book. The mild oxidation of thiols gives compounds called disulfides. 55.3 lb/ft3 (886 kg/m3) Turns out, was that lighting a match produces sulfur dioxide, a smell-causing compound that’s even stronger (and less disagreeable) than methyl mercaptan. Methyl mercaptan is mainly used to produce methionine, which is used as a dietary supplement for poultry and animal feed. But a sense of perspective is called for here. Example: CH 3 SH would be methyl mercaptan, just as CH 3 OH is called methyl alcohol. Industrial, Specialty, Medical, and Semiconductor – Search All Gases. The larger concentration of H aq ions Physical properties Odor. Methyl mercaptan is on the EPA's list of regulated toxic substances, but there is a limited amount of toxicological data on methyl mercaptan; the LC 50 for rats by inhalation for 1 hour is 1.3 g/m 3, and the OSHA PEL is 19.7 mg/m 3 (BOC, 1996). 10. US EN. Methanethiol (methyl mercaptan) 9.44 Methanol 10.85 n- Methyl acetamide 8.90 Methyl acetate 10.27 7.0 Methyl acetoacetate - 1.1 Methyl acetylene 10.37 Methyl acrylate 9.90 3.4 Methyl alcohol 10.85 Methyl amine 8.97 Methyl benzoate - 0.93 Methyl bromide 10.54 Methyl butyl ketone 9.34 Methyl butyrate 10.07 Methyl cellosolve 9.60 The odor is so easily detected that methyl mercaptan, and other thiols, are added to otherwise odorless natural gas to aid in leak detection. The invention discloses a catalyst used in the synthesis of methyl mercaptan and a preparation method of the catalyst, relates to the catalyst, and provides the catalyst with high specific surface area and low-temperature activity used in the synthesis of the methyl mercaptan and the preparation method of the catalyst. Methyl mercaptan (methanethiol) is used in pesticides, jet fuel additive, in the plastic industry and most importantly it is used as the intermediate in the synthesis of methionine (an amino acid), extensively used food supplement in poultry industry. * Metal containers involving the transfer of Ethyl Mercaptan should be grounded and bonded. It is one of the chemical compounds respo… For methyl mercaptan, which has a perception threshold of 0.3 parts per billion (ppb), both the cork- and ProCork-sealed bottles were below detection limit. ATTENTION: Memorandum for Clarification on the Scope of PCL has been issued: EMB MC 2020-010: Clarification to DENR Administrative Order 2007-23 on the Scope of … * Use only non-sparking tools and equipment, especially Trade name : 0-2ppm Methyl Mercaptan, 0-2ppm Ethyl Mercaptan, 0-5ppm H2S, 0-5ppm COS in Methane SDS Nr : AL730 1.2. Methyl mercaptan is a colorless gas with a strong odor. It is disposed of through animal feces. V . NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Identifying the sources of volatile organic compounds (VOCs) is key to air quality control and pollution prevention. Arkema also produces Amines , Oxygenated Solvents and Hydrazine Hydrate that can be useful in synthesizing intermediates. It Abbreviated EtSH, it consists of an ethyl group (Et), CH 3 CH 2, attached to a thiol group, SH. The global methyl mercaptan market reached a value of about USD 1.5 billion in 2020. The catalyst comprises active gamma-Al2O3 serving as an … Its structure parallels that of ethanol, but with sulfur in place of oxygen.The odor of EtSH is infamous. Br 4H . Common uses of methyl mercaptan include in the manufacturing of additives for jet fuels, catalysts, dyes, fungicides, pesticides, pharmaceuticals, plastics, and other chemicals. It is used in methionine synthesis and as an intermediate in the manufacture of pesticides, jet fuels, and plastics. Stripping of naturally occurring sulfur compounds from crude oil or natural gas, such as methyl mercaptan, ethyl mercaptan (CH 3 CH 2 SH) and propyl mercaptan (C 3 H 8 S). TBM is also a raw material used in gas odorant blends. Ethyl mercaptan calibration stock solution, 2.52 mg/mL. mercaptopurine. Moreover, microbial degradation of organic matter releases methyl mercaptan. sds. Pipet 5.0 mL methylene chloride into a vial and attach PTFE-lined cap. In addition, methyl mercaptan is a by-product of asparagus in roughly 50% of humans, and it is responsible for the distinct change in odor of the urine ( Richer et al., 1989 ). It is produced naturally by some marine algae. Methyl mercaptan is largely employed in the production of synthetic methionine as chicken feed supplement. Methanethiol (also known as methyl mercaptan) is an organosulfur compound. * Methyl Mercaptan may damage the liver and kidneys. • Persons exposed only to methyl mercaptan pose little risk of secondary contamination to personnel outside the Hot Zone. CPF : CPF 3 . The reaction pathway for synthesizing methyl mercaptan (CH 3 SH) using H 2 S-containing syngas (CO/H 2 S/H 2) as the reactant gas over SBA-15 supported K–Mo-based catalysts prepared by different impregnation sequences was investigated.The issue of the route to produce CH 3 SH from CO/H 2 S/H 2 has been debated for a long time. 4 workers inhale toxic concentrations of methyl mercaptan and die at dupont's la porte texas chemical plant - update. Surprisingly, however, it has been noted that sugarless chewing gum increased methyl mercaptan, one of the principal components of oral malodour. Use: The tertio-butyl mercaptan (TBM) is a key raw material for agrochemical synthesis. The accident at DuPont’s facility, located east of Houston, killed four workers and injured a fifth when methyl mercaptan, a toxic chemical used in the company’s insecticide and fungicide manufacturing process, was released. It is a naturally occurring chemical resulting from decomposition of organic matter. 2 RSH → [O] RSSR Under FFDCA section 408(g), 21 U.S.C. Substance information for UN 1064 - Methyl mercaptan based on the Hazardous Materials Table (Title 49 CFR 172.101) to assist in preparing a risk assessment for loading, transporting and storing hazardous materials. Airgas USA, LLC and its affiliates 259 North Radnor-Chester Road Suite 100 Radnor, PA 19087-5283 1-610-687-5253 1-866-734-3438 SDS # :001136 Synonym :ethyl mercaptan; Ethanthiol Section 2. Methyl mercaptan is produced by the reaction of hydrogen sulfide with methanol. Recoveries were 82.7% for methyl mercaptan, 89.3% for ethyl mercaptan, and 93.0% for . ETHYL MERCAPTAN page 4 of 6 * Sources of ignition, such as smoking and open flames, are prohibited where Ethyl Mercaptan is handled, used, or stored. Methyl mercaptan calibration stock solution, 0.394 mg/mL. N-methyl-2-pyrrolidone . It is a natural substance found in the blood, brain and feces of animals (including humans), as well as in plant tissues. Use Graham's law of effusion to determine how many times faster than methyl mercaptan methane would diffuse from a … 42.7°F (5.96°C) @ 70°F (21.1°C) = 24.7 Psia (170 kPa) Slightly N/A (Gas) Colorless gas with extremely unpleasant odor. More particularly, it relates to a continuous process for the preparation of methane sulfonyl chloride by the simultaneous hydrolysis and chlorination of methyl mercaptan. People can also use chewing gum to reduce oral malodour. Methyl Mercaptan is a colorless, flammable gas with a distinct, strong odor. Perform risk assessment prior to use. We know very little about what happens to methyl mercaptan after it is released to the environment. Buy high purity Methyl Mercaptan Solution analytical standards from Chem Service Inc. at $21.40. The DuPont facility, located east of Houston, uses methyl mercaptan to manufacture insecticides and fungicides, according to CSB. The Priority Chemicals List (PCL) is a list of existing and new chemicals that DENR-EMB has determined to a potentially pose unreasonable risk to public health, workplace, and the environment.. Structure Search. One little-discussed aspect of the natural gas industry is the continuing use of methyl mercaptan, which has caused at least three fatalities. Methanethiol /ˈmɛθeɪnˈθaɪɒl/ (also known as methyl mercaptan) is an organosulfur compound with the chemical formula CH 3SH. Understandably, they are a valuable resource for any business where gasses and chemicals are present. It is the largest volume mercaptan produced in the world. So it turns out a match only disguises poop smell! 8. Methyl mercaptan occurs naturally in a wide variety of vegetables (such as onions and garlic), in "sour" gas in West Texas oil fields, in coal tar and petroleum distillates. Inhalation at high concentrations can result in dyspnea, hypoventilation, seizures, and death. Creativity Beyond Chemistry: Production • Distribution • Sourcing • Logistics • Consulting: Our hybrid business model, combining manufacturing with sourcing and exclusive distribution agreements, results in a superior level of purchasing power that when added to our global warehouse network with locations near all major flavor and fragrance industry compounding … It is found in a wide variety of vegetables (such as garlic and onions), in “sour” gas in oil … It has a role as a bacterial xenobiotic metabolite, a marine metabolite, an EC 3.5.1.4 (amidase) inhibitor, … Dangerous fire or explosion hazard when exposed to heat, flame, sparks or strong oxidizing agents (e.g., calcium hypochlorite). Chemical name :Ethyl Mercaptan Supplier's details : Ethyl Mercaptan Product use :Synthetic/Analytical chemistry. is a colorless liquid with a distinct odor. Define ethyl mercaptan. Methyl mercaptan (CH 3 SH) is a colorless, toxic gas with potential for occupational exposure and used as a weapon of mass destruction. Seluzhitsky GV [1972]. Methyl mercaptan (CH 3 SH), also known as methanethiol, is a colourless, highly flammable, toxic gas with a distinct, strong unpleasant odour. These compounds are emitted from many points within a mill, but the main sources are the digester/blow tank systems and the direct contact evaporator. 1,2 It exists widely in petroleum gas, coal gas, and natural gas, and can be emitted from many agricultural and chemical processes. Methyl mercaptan is manufactured for use in pesticides, as a jet fuel additive, in the plastics industry, and in making methionine, a nutrient that is added to poultry feed. Stripping of naturally occurring sulfur compounds from crude oil or natural gas, such as methyl mercaptan, ethyl mercaptan (CH 3 CH 2 SH) and propyl mercaptan (C 3 H 8 S). 2. Mint did not reduce the concentration of methyl mercaptan either, although these products are widely used for their ability to mask oral malodour. Experimental data for substantiation of the threshold of methyl mercaptan, dimethyl sulfide, and dimethyldisulfide in the air of the working zone of paper industries. 4-20mA and Modbus RS-485 outputs. The market is further expected to grow at a CAGR of 5.5% in the forecast period of 2021-2026 to reach a value of approximately USD 2.07 billion by 2026. By far the single biggest use is for production of synthetic methionine as a chicken feed supplement. Dimethyl disulfide, made by oxidizing methyl mercaptan, is used in blends for natural gas, but that’s as close as methyl mercaptan comes to being used in the natural gas world. Find methyl mercaptan and related products for scientific research at MilliporeSigma. Visitors can also do a reverse look up and match the elastomer to the chemical. The activator, cesium tungstate, gives an unexpected increase in activity and selectivity as compared with potassium tungstate, … Ethyl Mercaptan is a colorless or yellowish liquid or a gas with a pungent, garlic or skunk-like odor. It is used as an additive to odorless gases like butane, propane, and petroleum to give them a warning odor. It is also used in the manufacture of fungicides, pharmaceuticals, insecticides, resins, and other chemicals. Methyl mercaptan is colourless gas, with a strong characteristic odour and a very low odour threshold. Eon Market Research has added a report titled “Global Methyl Mercaptan Market Research Report 2020 Analysis, Demand, Insight, Key Players, Segmentation and Forecast to 2025”. Morpholine . Ethyl-mercaptan meaning A colorless organic liquid, C 2 H 5 SH, that has a strong odor and is added to odorless fuel and fuel systems as a warning agent. It is also converted to dimethyl disulphide (DMDS), which is used to remove tar from the catalysts used in petroleum refining. Methyl isocyanate . Methyl Mercaptan 74-93-1 Methemoglobin: 1.5 % Hb (In blood) During or at the end of the shift 2010-03-01 Engineering measures Adequate ventilation to control airborned concentrations below the exposure guidelines/limits. Ethanethiol, commonly known as ethyl mercaptan, is an organosulfur compound with the formula CH 3 CH 2 SH. It is a colorless gas with a distinctive putrid smell. Relevant identified uses of the substance or mixture and uses advised against Relevant identified uses : Industrial and professional. Chevron Phillips: tert-Butyl Mercaptan: EMD Millipore: For experimental / research use only. Many thiols have strong odors resembling that of garlic. Methyl mercaptan is flammable over a wide range in air. Products Building Blocks Explorer Technical Documents Site Content Papers Genes. Use them to detect mercaptan in the environment or in any chemical plant that uses or produces mercaptan. It is also known as methanethiol. Read full chapter. When released into the atmosphere, CH 3 SH can contribute to the formation of sulfate particles, … Methyl Mercaptan (CH 3 SH) CAS 74-93-1; UN 1064 Synonyms include methanethiol, mercaptomethane, thiomethanol, methyl sulfhydrate, and thiomethylalcohol. 5 tennessee utility workers injured in gas line explosion and fire. Ships Today (3) Product Category. Updated use levels and food categories collected as part of the FDA’s SLR project are available from the FEMA office for this flavor ingredient upon request. Both hydrogen sulfide (H2S) and methyl mercaptan (CH3SH) are frequently detected in large amounts in malodorous mouth air. Organic Chemicals (1,491 Companies) Search by Specification | Learn More about Organic Chemicals. ETHYL MERCAPTAN page 4 of 6 * Sources of ignition, such as smoking and open flames, are prohibited where Ethyl Mercaptan is handled, used, or stored. DADS was also found to be transformed to AM, AMS, allyl methyl sulfoxide, and allyl methyl sulphone in stomach, plasma, liver and urine of rats . In this study, the potential source of methyl mercaptan (MeSH) near a large refining and … 15 2014, veteran operator Crystal Rae Wise opened a faulty valve on a pipe carrying methyl mercaptan, a chemical used to manufacture DuPont's popular insecticide called Lannate. However, the screwcapped bottle showed a level of 0.6 ppb, above perception threshold. Buy Industrial and Specialty Gases from MATHESON – including liquids, gases, gas mixtures – in all purity grades and a variety of cylinders/container types and delivery options. METHYL MERCAPTAN. Methane sulfonyl chloride (sometimes referred to as mesyl chloride) is an old compound having many known uses. Products. As a byproduct of many biochemical and pharmaceutical processes. You must file your objection or request a hearing on this regulation in accordance with the instructions provided in 40 CFR part 17… 316 Stainless Steel Housing. pesticides, fungicides, jet fuel components, plastics, and the amino acid methionine [CH3SCH2CH2CG(NH2)COOH]. * Repeated exposure may affect the blood cells causing anemia. If you have a powder-room or toilet that guests use when they visit, you should consider leaving matches in the room. Tansy MF, Kendall FM, Fantasia J, Landin WE, Oberly R [1981]. B . oxides, two different size ratios were used, 0.66 for zinc oxide and 0.142 for iron oxide. Though receptor models have been widely used in source apportionment of VOCs, they are not applicable to identify the potential source of labile species. Footnotes to Tables 1 and 2 of this section: 1 [Reserved]. Four other companies are … The other uses of methyl mercaptan is as fungicide and as a catalyst for various reactions. Shipping. METHYL MERCAPTAN: ICSC: 0299 (June 2003) Methanethiol Mercaptomethane Methyl sulfhydrate Thiomethanol: CAS #: 74-93-1: UN #: 1064 EC Number: 200-822-1 ACUTE HAZARDS PREVENTION FIRE FIGHTING; FIRE & EXPLOSION: Extremely flammable. Add 1.0 mL pure methyl mercaptan gas (measured at 25 °C, 1 atm) to the liquid using gas-tight syringe. 4H (PE/EVAL) B ; Barricade . Each fact sheet … NEMA 4X. The ATSDR ToxFAQs™ is a series of summaries about hazardous substances developed by the ATSDR Division of Toxicology. It is a natural substance found in the blood, brain and feces of animals (including humans), as well as in plant tissues.It also occurs naturally in certain foods, such as some nuts and cheese. There are no studies available for the dermal absorption of methyl mercaptan. Introduction As a colorless, polar, and volatile organic sulfur compound, methyl mercaptan (methanethiol, CH 3 SH) is well known for its disagreeable odour. A catalyst for the synthesis of methyl mercaptan from hydrogen sulfide and methanol, as well as a process for preparing the catalyst. Advanced Search. Br . The market is further expected to grow at a CAGR of 5.5% in the forecast period of 2021-2026 to reach a value of approximately USD 2.07 billion by 2026. The method was evaluated for recovery and extraction efficiency with gas spikes, 18 samples (6 at each level, 0.5, 1, and 2 × PEL) (Figure 1). Search Within. IDENTIFICATION Methyl Mercaptan can exist as a gas, with a disagreeable odor like garlic, or as a white liquid. Methanethiol / ˈ m ɛ θ eɪ n ˈ θ aɪ ɒ l / (also known as methyl mercaptan) is an organosulfur compound with the chemical formula CH 3 SH.It is a colorless gas with a distinctive putrid smell. Methyl trichlorosilane . Allicin and vinyldithiins were still present in the blood when the study concluded at 72 h. In another study, allicin was rapidly transformed in rat liver to DADS and allyl mercaptan (AM) . Dimethyl disulfide is formed through the oxidation of mercaptan groups derived from the lignin. Along with other compounds within the mercaptan family and different odorant blends, mercaptan is used to give natural gas that “rotten egg” odor, keeping you aware of dangerous leaks. The report will include the impact of COVID 19 and its impact on the growth of this industry during the forecast period. The Chemical Compatibility tool allows visitors to select the chemical in their application and find the best suited elastomer for service. 2 See Table 2 of this section.. 3 Use Asbestos Limit §1926.1101.. 4 [Reserved]. * Use only non-sparking tools and equipment, especially First aid measures As this product is a gas, refer to the inhalation section. Methyl mercaptan (CH 3 SH) is a common offending compound. The global methyl mercaptan market reached a value of about USD 1.5 billion in 2020. Gas/air mixtures are explosive. n. A colorless organic liquid, C2H5SH, that has a strong odor and is added to … 1. Detcon DM-700-CH3SH Electrochemical "Smart" Methyl Mercaptan (CH3SH) 0-3 ppm or 0-100 ppm Sensor Assembly with LED display. TR-60D (100-99) Rev.∅ 08/16/04 Page 2 of 19 TABLE OF CONTENTS 1.0 Discussion 2.0 Guide to Compatibility Key 3.0 Chemical Compatibility Guide for Commonly Used Elastomers for O-Rings Methyl glycol (methyl cellosolve) Br 4H . Methyl mercaptan binds to protein and erythrocytes and is extremely effective in stabilizing erythrocyte membranes against hypotonic hemolysis. Methyl mercaptan (methanethiol, CH:SH; MM = 48.11 g/mol) is an odorant used in natural gas mixtures containing methane (CH«; MM = 16.04). When heating to decomposition emits highly toxic fumes of oxides of sulfur [Lewis, 3rd ed., 1993, p. 862]. 12.1 Global Forecasted Demand Analysis of Methyl Mercaptan. Ethanethiol (ethyl mercaptan) is the most common odorant for liquid propane (LP) gas. 5 See Table 2 of this section for the exposure limit for any operations or sectors where the exposure limit in §1926.1153 is stayed or is otherwise not in effect. Further, absorption of sulfur compounds in gas (hydrogen sulfide (H 2 S), carbonyl sulfide (COS), methyl mercaptan (C 1 SH), ethyl mercaptan (C 2 SH), dimethyl sulfide (DMS), and carbon disulfide (CS 2) were evaluated at 26°C, 15 psi. On contact with strong acids or when heated to decomposition it emits highly toxic fumes of sulfur oxides [Sax, 9th ed., 1996, p. 1575]. That’s the power of mercaptan, or methanethiol when used as a natural gas additive. Class I, Div. N . Under normal conditions, methyl mercaptan is gaseous; this means that in or-der to calculate the amount absorbed through the skin it must first be determined which substance concentra- Mercaptan can be defined as the class of organic compounds derived from Latin mercurium captans, which are composed of an aryl or alkyl group and a thiol group. Methyl mercaptan, if present, produces a transistory yellow stain on the lead acetate paper which, however, fades completely in less than 5 min. The Methyl Mercaptan market report offers the growth scenarios present globally as … * Methyl Mercaptan is a HIGHLY FLAMMABLE GAS and a DANGEROUS FIRE HAZARD. Methyl mercaptan also is used in industrial applications as an intermediate in the production of pesticides, fungicides, plastics and animal feed additives. WHAT IS MERCAPTAN? Sodium methyl mercaptide (SMM), ethyl mercaptan (EM) and tertio-butyl mercaptan (TBM) are used worldwide to produce intermediates entering for instance in terbufos or phorate agrochemicals. Methyl mercaptan is a colorless, highly flammable, toxic gas with a distinct, strong unpleasant odour released from microbial degradation of organic matter. It is an organosulfur volatile organic compound (VOC) that can be easily ignited and decomposed, emitting highly toxic fumes and flammable vapours. NO open flames, NO sparks and NO smoking. 1, Groups B, C, & D. CSA and ATEX approvals. Substance information for UN 1064 - Methyl mercaptan based on the Hazardous Materials Table (Title 49 CFR 172.101) to assist in preparing a risk assessment for loading, transporting and storing hazardous materials. As a result, prolonged exposure of the CH 3 SH can quickly deaden a person’s sense of smell, making the odour of methyl mercaptan an unreliable … Br : Butyl rubber . Methyl Mercaptan Section 4. Applications of methyl mercaptan include the following: used in organic synthesis; as an intermediate … It occurs naturally in certain foods, such as some nuts and cheese. Methyl mercaptan and dimethyl sulfide are formed in reactions with the wood component, lignin. Methyl mercaptan is a volatile organic compound known as organosulfur due to its sulfur content. Methyl mercaptan is also commonly used to odorise natural gas for safety purposes. 2-Methyl-2-propanethiol. Abbreviations used for glove material: 4H . Methanethiol (also called methyl mercaptan), has the formula CH 3 SH. The La Porte plant has 320 DuPont employees. Methyl mercaptan is primarily produced by the reaction of hydrogen sulfide with methanol. It also occurs naturally in certain foods, such as some nuts and cheese. Methyl mercaptan is also released as a decay product of wood in pulp mills. The word mercaptan replaces alcohol in the name of the equivalent alcohol compound. Methyl mercaptan . See annual publication for most recent information. Ethyl Mercaptan will maintain the chemical equilibrium across the liquid and vapour space. It is found as an emission from paper and pulp mills. Ethyl mercaptan (not methyl mercaptan) is used in LPG as an odourant to generate the telltale smell. * Metal containers involving the transfer of Ethyl Mercaptan should be grounded and bonded. It is a naturally occurring chemical resulting from decomposition of … Pva B . Use Graham's law of effusion to determine how many times faster than methyl mercaptan methane would diffuse from a … ETHYL MERCAPTAN reacts violently with calcium hypochlorite, May react vigorously with other oxidizing reagents. Methyl ethyl ketone peroxide (MEKP) V Ne Br . Methionine is an essential amino acid for building protein. The compound reacts directly with collagen. H 2 S is a stronger acid, so it dissociates to a greater extent than methyl mercaptan, producing an excess of H + aq ions. The term sulfhydryl-or mercapto-is used as a prefix, e.g. Dimethyl sulfide is a methyl sulfide in which the sulfur atom is substituted by two methyl groups. (74-93-1) (S-12442M4-1ML) -butyl mercaptans, as well as methyl mercaptan [1]. Applications Products Services Support. It is used to give odor to Methyl mercaptan is colourless gas, with a strong characteristic odour and a very low odour threshold. The catalyst contains active aluminum oxide on which 15% to 40% by weight cesium tungstate is deposited as the activator. METHYL MERCAPTAN is a reducing agent--can react vigorously with oxidizing agents. It reacts with acids releasing toxic, flammable vapors which can react violently with oxidizing agents. No specific methyl mercaptan antidote exists, highlighting a critical need for such an agent. Methyl mercaptan is colourless gas, with a strong characteristic odour and a very low odour threshold. Applications. Information for this series is excerpted from the ATSDR Toxicological Profiles and Public Health Statements. NiuzgZb, CUEYnMD, auHp, rcN, FQKhz, sNi, yCd, FQhtAFn, tfqNg, kBO, MrpC,
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