[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-472151-105":59,"doc-detail-472151-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","hydrogen-sulphide-revised-june-2023","HYDROGEN SULPHIDE - Revised June 2023","","Revised June 2023 guidance for preventing worker overexposure to hydrogen sulphide (H2S), a colourless, flammable, acutely lethal gas with a strong rotten-egg odour. Describes key physical properties, hazards, and how H2S can react with equipment corrosion to form pyrophoric iron sulphide. Summarizes health effects for short-term concentrations, including pulmonary edema delays up to 72 hours, and longer-term impacts such as low blood pressure and neurological symptoms, plus stated limitations on carcinogen classification and the need for further research.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/hydrogen-sulphide-revised-june-2023/472151/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/hydrogen-sulphide-revised-june-2023/472151.png","ImageObject",300,407,{"name":92,"@type":93},"Mia  ","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-31","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":39},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why is hydrogen sulphide (H2S) considered difficult to detect by smell?","Question",{"text":112,"@type":113},"Odour cannot be relied on for detection because concentrations above 100 ppm rapidly deaden a person’s sense of smell, so unsafe levels may go unnoticed.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What are the primary health risks from short-term exposure to H2S?",{"text":117,"@type":113},"Acute exposure can irritate the nose, throat, eyes, and lungs, and higher concentrations can cause severe injury, pulmonary edema, respiratory paralysis, irregular heartbeat, collapse, and death within hours.",{"name":119,"@type":110,"acceptedAnswer":120},"Can symptoms after H2S exposure appear later than the exposure itself?",{"text":121,"@type":113},"Yes. Symptoms of pulmonary edema, such as chest pain or shortness of breath, can be delayed for up to 72 hours after exposure.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},472151,1790863503,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":39,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},687207024478,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","Revised: June 2023  \nHYDROGEN SULPHIDE  \n1. Introduction  \nHydrogen Sulphide (H2S) is a colourless, poisonous, flammable gas with a strong smell of rotten eggs. It is also known as sewer gas or stink damp and can be detected by smell at concentrations ranging from 0.01-0.3 parts per million (ppm) . However, its odour cannot be relied on for detection because at concentrations above 100 ppm it deadens a person’s sense of smell within a few minutes. The pure gas is heavier than air and can collect in low areas such as sewers, pits, tunnels, and gullies.  \n1.1. Purpose  \nThe purpose of this COP is to ensure all reasonable precautions are in place to eliminate possible worker overexposure to H2S. In addition, this COP will identify properties / hazards associated with H2S, exposure limits, possible sources of H2S, detection and monitoring requirements, required personal protective equipment, signage and product labeling requirements, worker training requirements, use of safe work procedures, emergency procedures in the event of exposure to H2S, and individual responsibilities.  \n1.2 Application  \nThis code of practice is to be followed any time CPES is working or directing work where there is confirmed, or the potential for, exposure to Hydrogen Suphide (H2S) . The goal is to minimize exposure and to ensure legislated limits are never exceeded.  \n1.3 Physical Properties  \n􀁸 Colour: colourless.  \n􀁸 Odour: very offensive, similar to rotten eggs in small quantities.  \n􀁸 Vapour Density: 1.189 (air 1.0), H2S is heavier than air thus low-lying areas may have higher concentrations of H2S.  \n􀁸 Boiling Point: minus 60 Degrees C.  \n􀁸 Explosive Limit: 4.3 to 46 percent by volume in air.  \n􀁸 Auto Ignition Temp: 260 Degrees C.  \n􀁸 Water Soluble: Yes – 4 volumes of gas in 1 volume of water at 0 Degrees C.  \n􀁸 Flammability: Is flammable in air at 40,000 ppm (4%) or higher.  \nHydrogen sulphide can react with rust or corrosion deposits on equipment to form Iron Sulphide. This reaction occurs in an oxygen free atmosphere where hydrogen sulphide gas is present or where the concentration of hydrogen sulphide is greater than that of oxygen. This happens most often in closed vessels, tanks, or pipelines. Iron sulphide is a pyrophoric material, which means that it can ignite spontaneously when it is exposed to air.  \n1.4 Health Effects  \nHydrogen sulphide is extremely toxic. Workers are exposed when they inhale hydrogen sulphide that is in the air and becomes quickly absorbed by the lungs. It is believed that exposure to hydrogen sulphide prevents the brain from using oxygen by inhibiting the enzyme cytochrome oxidase.  \nRevised: June 2023 HYDROGEN SULPHIDE  \nShort-Term Exposure  \nShort–term (acute) exposure to hydrogen sulphide can cause irritation to the nose, throat, eyes and lungs. Exposure to higher concentrations can cause very serious health effects, and even death.  \nTable 1-Health effects from short-term exposure to hydrogen sulphide:  \n\n| Concentration (ppm) | Health Effect |\n| --- | --- |\n| 0.01-0.3 | Odour threshold |\n| 1-20 | Offensive odour, possible nausea, tearing of the eyes or headaches with\u003Cbr>prolonged exposure |\n| 20-50 | Nose, throat and lung irritation; digestive upset and loss of appetite; sense of smell starts to become fatigued; acute conjunctivitis may occur\u003Cbr>(pain, tearing and light sensitivity) |\n| 100-200 | Severe nose, throat and lung irritation; ability to smell odour completely\u003Cbr>disappears |\n| 250-500 | Pulmonary edema (buildup of fluid in the lungs) |\n| 500 | Severe lung irritation, excitement, headache, dizziness, staggering, sudden collapse (knockdown), unconsciousness and death within a few hours, loss of memory for the period of exposure |\n| 500-1000 | Respiratory paralysis, irregular heartbeat, collapse and death without\u003Cbr>rescue |\n| >1000 | Rapid collapse and death |\n\nIt is important to note that the symptoms of pulmonary edema (buildup of fluid in the lungs), such as chest pain or shortness of breath, can be","cbCaifjjjdvImmIm","https://ap.wps.com/l/cbCaifjjjdvImmIm","pdf",474974,"English","# 1. Introduction\n## 1.1. Purpose\n## 1.2. Application\n## 1.3. Physical Properties\n## 1.4. Health Effects\n# Short-Term Exposure\n## Table 1-Health effects from short-term exposure\n# Long-Term Exposure","[{\"question\":\"Why is hydrogen sulphide (H2S) considered difficult to detect by smell?\",\"answer\":\"Odour cannot be relied on for detection because concentrations above 100 ppm rapidly deaden a person’s sense of smell, so unsafe levels may go unnoticed.\"},{\"question\":\"What are the primary health risks from short-term exposure to H2S?\",\"answer\":\"Acute exposure can irritate the nose, throat, eyes, and lungs, and higher concentrations can cause severe injury, pulmonary edema, respiratory paralysis, irregular heartbeat, collapse, and death within hours.\"},{\"question\":\"Can symptoms after H2S exposure appear later than the exposure itself?\",\"answer\":\"Yes. Symptoms of pulmonary edema, such as chest pain or shortness of breath, can be delayed for up to 72 hours after exposure.\"}]","HYDROGEN SULPHIDE - Revised June 2023 | PDF",1790780278,15]