{"id":1850,"date":"2025-07-26T08:58:03","date_gmt":"2025-07-26T08:58:03","guid":{"rendered":"https:\/\/wccmajwr.elementor.cloud\/?page_id=1850"},"modified":"2025-11-25T03:50:16","modified_gmt":"2025-11-25T03:50:16","slug":"on-site-supply","status":"publish","type":"page","link":"https:\/\/messer.co.th\/en\/on-site-supply\/","title":{"rendered":"Argon"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1850\" class=\"elementor elementor-1850\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7d15ed970 elementor-section-height-min-height elementor-section-full_width elementor-section-height-default elementor-section-items-middle\" data-id=\"7d15ed970\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;video&quot;,&quot;background_video_link&quot;:&quot;https:\\\/\\\/messer.co.th\\\/wp-content\\\/uploads\\\/2025\\\/10\\\/50.mp4&quot;,&quot;background_play_on_mobile&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-background-video-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<video class=\"elementor-background-video-hosted\" role=\"presentation\" autoplay muted playsinline loop><\/video>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-abfc667\" data-id=\"abfc667\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a45a98f elementor-widget elementor-widget-ucaddon_blox_particles_logo\" data-id=\"a45a98f\" data-element_type=\"widget\" data-widget_type=\"ucaddon_blox_particles_logo.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n<!-- start Particle Image -->\n<style>\/* widget: Particle Image *\/\n\n#uc_blox_particles_logo_elementor_a45a98f {\n  display: none;\n}\n.uc_blox_particles_logo_elementor_a45a98f_particle-img-wrapper{\nwidth:100%;\nheight:350px;\ntext-align:center;}\n\n<\/style>\n\n<div class=\"uc_blox_particles_logo_elementor_a45a98f_particle-img-wrapper\">\n<img decoding=\"async\"\n  id=\"uc_blox_particles_logo_elementor_a45a98f\"\n  class=\"uc_blox_particles_logo_elementor_a45a98f ue-particle-image\"\n  data-width=\"350\"\n  data-height=\"350\"\n  data-max-width=\"70%\"\n  data-particle-gap=\"2\"\n  data-color=\"\"\n  data-gravity=\"1\"\n  data-noise=\"6\"\n     \n  data-renderer=\"webgl\"\n \n     \n  data-particle-size=\"1\"\n  data-layer-count=\"1\"\n  data-layer-distance=\"-10\"\n  data-depth=\"3\"   \n  data-life-cycle=\"false\"\n  data-grow-duration=\"10\"\n  data-wait-duration=\"180\"\n  data-shrink-duration=\"50\"\n  data-shrink-distance=\"120\"\n\n       \n  data-mouse-force=\"30\"\n  data-init-position=\"none\"\n  data-init-direction=\"none\"\n  data-fade-position=\"none\"\n  data-fade-direction=\"none\"\n  src=\"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1.png\" >\n<\/div>\n<!-- end Particle Image -->\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-63acb2e e-flex e-con-boxed e-con e-parent\" data-id=\"63acb2e\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5b0f88e e-con-full e-flex e-con e-child\" data-id=\"5b0f88e\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-7f31dca e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"7f31dca\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeIn&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e95dad9 elementor-widget elementor-widget-heading\" data-id=\"e95dad9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Argon (Ar)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09799d3 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"09799d3\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7ee0810 elementor-widget elementor-widget-video\" data-id=\"7ee0810\" data-element_type=\"widget\" data-settings=\"{&quot;video_type&quot;:&quot;hosted&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;play_on_mobile&quot;:&quot;yes&quot;,&quot;mute&quot;:&quot;yes&quot;,&quot;loop&quot;:&quot;yes&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t\t\t\t<div class=\"e-hosted-video elementor-wrapper elementor-open-inline\">\n\t\t\t\t\t<video class=\"elementor-video\" src=\"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/50.mp4\" autoplay=\"\" loop=\"\" controls=\"\" muted=\"muted\" playsinline=\"\" controlsList=\"nodownload\"><\/video>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-73879fd elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"73879fd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #000000;\">Argon is an atom, with the symbol Ar and atomic number 18 and atomic mass 39,948. It was discovered in the 19th century by Sir Rayleigh and Sir William Ramsay. It is a colorless, odorless, non-combustible and non-toxic noble gas. It is heavier than air. Air contains a concentration of approximately 0.93% argon. The most important chemical property of argon is its inertia, but also the visible spectral line of the argon atom in a plasma makes argon applications in lighting possible. Argon is also often used in mixtures in plasma, welding and cutting applications, often in combination with lower concentration of other active gas components in 2,3,4 and more component gas mixtures.<\/span><\/p><p><span style=\"color: #000000;\"><strong><br \/>NAMING CONVECTIONS E.G ARGON 4.6<\/strong><\/span><\/p><p><span style=\"color: #000000;\">The quality of the gas is expressed in number of nines in the purity. When you see Argon 4.6, Argon 5.0, Argon 4.8 or any other number after the gas name it expresses the purity where the first number represents the number of 9\u2019s in the purity and the number after the point the last digit in the purity. Argon 4.6 is thus a 99,996 % pure gas. The remaining components are specified in the technical data sheet of the gas<\/span><\/p><p><span style=\"color: #000000;\"><strong><br \/>PROPERTIES OF ARGON<\/strong><\/span><\/p><p><span style=\"color: #000000;\">For\u00a0 more information about the properties as well as an easy calculator to convert between the units, Messer proposes its application in either Apple Store or Android Play<\/span><\/p><p><span style=\"color: #000000;\"><strong><br \/>APPLICATIONS OF ARGON<\/strong><\/span><\/p><p><span style=\"color: #000000;\">Welding: Thanks \u00a0to its unwillingness to create bonds with other gases, argon is the ideal protective gas for welding, even at very high temperatures of the plasma arch, which is often the case in metal processing. Indeed even at very high temperatures and In contrast to nitrogen, argon remains inert and does not form compounds with oxygen. Argon is an excellent gas for both MIG and TIG welding. The ideal welding gas for specific welding works can be compiled by possibly adding other active gas components (carbonic acid, helium, nitrogen or oxygen) into two, three, four and even higher component gases. Laser welding and also 3D metal printing techniques have become important areas for argon applications.<\/span><\/p><p><span style=\"color: #000000;\">Extinguishing: argon can also serve as an extinguishing agent in areas where water or foam cannot be used.<\/span><\/p><p><span style=\"color: #000000;\">For more detailed information about applications of nitrogen throughout the industry as well as the expertise that Messer can supply to solve challenges in your processes with our knowledge of gases (we call it application technology) , we refer to the pages (in English) on our corporate website. It gives you also more information on the R&amp;D efforts and trials that Messer proposes.<\/span><\/p><p><span style=\"color: #000000;\"><strong><br \/>ARGON GAS BOTTLES<\/strong><\/span><\/p><p><span style=\"color: #000000;\">There are gas cylinders in different sizes and with different pressures. Depending on the type of gas in the bottle, the &#8220;shoulder&#8221; of the bottle has a different color, which is standardized under the European standard EN 1089-3. In the case of argon this is green. An overview of the different colors of the gas bottles can be found here.<\/span><\/p><p><span style=\"color: #000000;\">At high pressure argon gas deviates from the ideal gas law. For example, at a pressure of 200 bar, a gas cylinder contains 7% more gas than the ideal gas law requires. An argon gas cylinder of 300 bar contains up to 50% more argon gas than a gas cylinder with 200 bar. This is the highest possible pressure. At Messer we offer both types of pressure for argon gas cylinders.<\/span><\/p><p><span style=\"color: #000000;\">Like all bottles, our gas bottles are treated on the inside, dried and chemically made passive. In this way we can guarantee optimum purity and avoid that our customers or our employees are exposed to certain risks because the gas bottles have not been treated properly by the previous user.<\/span><\/p><p><span style=\"color: #000000;\">Because the bottles come in different shapes and pressures, it is important that the correct accessories are supplied. This way the gas can be led to your application under the right pressure and with the right flow rate. For bottles that do not contain a pressure of 300 bar, the thread varies from country to country.<\/span><\/p><p><span style=\"color: #000000;\">\u00a0<\/span><\/p><p><span style=\"color: #000000;\"><strong>LIQUID ARGON IN CONTAINERS \u2013 LIQUID ARGON IN CRYOGENIC STORAGE VESSELS<\/strong><\/span><\/p><p><span style=\"color: #000000;\">We also offer argon in liquid form for large consumers. We have a wide range of storage tanks with different capacities.To keep the temperature of liquid argon low, the argon must be stored in a cryogenic containers. You can purchase or rent this cryogenic containers (dewar or portable liquid container (PLC), cryogenic tank or mini-bulk). Due to the extremely low temperatures, the safety regulations must be strictly adhered to. For example, it is recommended to wear cryogenic protective gloves or other special protective gloves.<\/span><\/p><p><span style=\"color: #000000;\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b7df74f elementor-widget elementor-widget-heading\" data-id=\"b7df74f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Application for Argon (Ar)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c19341d elementor-widget elementor-widget-heading\" data-id=\"c19341d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"> Global Production, Local Expertise<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-665563f elementor-widget elementor-widget-video\" data-id=\"665563f\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=n4VlyiHxYg0&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d46e8ce elementor-widget elementor-widget-text-editor\" data-id=\"d46e8ce\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">With production plants across Europe, Asia, and the Americas, we ensure local service backed by globally unified quality. Our facilities meet the strictest standards\u2014ISO 9000, ISO 17025, and ISO 17034\u2014ensuring consistency, traceability, and trust.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c96b17 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"4c96b17\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4dce9fb e-grid-align-left elementor-shape-rounded elementor-grid-0 elementor-widget elementor-widget-social-icons\" data-id=\"4dce9fb\" data-element_type=\"widget\" data-widget_type=\"social-icons.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-social-icons-wrapper elementor-grid\" role=\"list\">\n\t\t\t\t\t\t\t<span class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t<a 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\n\n<div id=\"uc_uc_icon_accordion_elementor_25dc054_item1\" class=\"uc_ac_box  elementor-repeater-item-4251f27\">\n  <div class=\"uc-heading uc_trigger\">\n    \n        <div class=\"ue_icon_holder\">\n      <div class=\"ue_icon\"><i class='fas fa-book'><\/i><\/div>\n    <\/div>\n    <div class=\"ue_icon_spacing\"><\/div>\n        \n    <div class=\"ue_title\">Occurrence<\/div>\n    \n    \n        <div class=\"ue_expand_spacing\"><\/div>\n    <div class=\"ue_expand\">\n      <div class=\"ue_expand_inside\">\n      <span class=\"uc_dactive bbb ue_accordion_icon\" ><i class='fas fa-plus'><\/i><\/span>\n      <span class=\"uc_active bbb ue_accordion_icon\"><i class='fas fa-minus'><\/i><\/span>\n      <\/div>\n    <\/div>\n        \n  <\/div>\n  <!-- end of heading -->\n  \n  \n  <div class=\"uc_content\" >\n          <p>Most common noble gas on Earth; about 0.93 % share of the atmosphere.<\/p>\n     \n    \n     \n    \n  <\/div>\n<\/div>\n\n\n<div id=\"uc_uc_icon_accordion_elementor_25dc054_item2\" class=\"uc_ac_box  elementor-repeater-item-085dd90\">\n  <div class=\"uc-heading uc_trigger\">\n    \n        <div class=\"ue_icon_holder\">\n      <div class=\"ue_icon\"><i class='fas fa-flask'><\/i><\/div>\n    <\/div>\n    <div class=\"ue_icon_spacing\"><\/div>\n        \n    <div class=\"ue_title\">Chemical Properties<\/div>\n    \n    \n        <div class=\"ue_expand_spacing\"><\/div>\n    <div class=\"ue_expand\">\n      <div class=\"ue_expand_inside\">\n      <span class=\"uc_dactive bbb ue_accordion_icon\" ><i class='fas fa-plus'><\/i><\/span>\n      <span class=\"uc_active bbb ue_accordion_icon\"><i class='fas fa-minus'><\/i><\/span>\n      <\/div>\n    <\/div>\n        \n  <\/div>\n  <!-- end of heading -->\n  \n  \n  <div class=\"uc_content\" >\n          <p>Colorless, odorless noble gas, monatomic and extremely inert,<br \/>heavier than air, nonflammable<\/p>\n     \n    \n     \n    \n  <\/div>\n<\/div>\n\n\n<div id=\"uc_uc_icon_accordion_elementor_25dc054_item3\" class=\"uc_ac_box  elementor-repeater-item-7cd4da2\">\n  <div class=\"uc-heading uc_trigger\">\n    \n        <div class=\"ue_icon_holder\">\n      <div class=\"ue_icon\"><i class='fas fa-cloud'><\/i><\/div>\n    <\/div>\n    <div class=\"ue_icon_spacing\"><\/div>\n        \n    <div class=\"ue_title\">Extraction (Air separation)<\/div>\n    \n    \n        <div class=\"ue_expand_spacing\"><\/div>\n    <div class=\"ue_expand\">\n      <div class=\"ue_expand_inside\">\n      <span class=\"uc_dactive bbb ue_accordion_icon\" ><i class='fas fa-plus'><\/i><\/span>\n      <span class=\"uc_active bbb ue_accordion_icon\"><i class='fas fa-minus'><\/i><\/span>\n      <\/div>\n    <\/div>\n        \n  <\/div>\n  <!-- end of heading -->\n  \n  \n  <div class=\"uc_content\" >\n          <p>Extremely reactive, forms compounds with nearly all other elements,<br \/>participates in most combustion and corrosion processes.<\/p>\n     \n    \n     \n    \n  <\/div>\n<\/div>\n\n\n<div id=\"uc_uc_icon_accordion_elementor_25dc054_item4\" class=\"uc_ac_box  elementor-repeater-item-d857592\">\n  <div class=\"uc-heading uc_trigger\">\n    \n        <div class=\"ue_icon_holder\">\n      <div class=\"ue_icon\"><i class='far fa-snowflake'><\/i><\/div>\n    <\/div>\n    <div class=\"ue_icon_spacing\"><\/div>\n        \n    <div class=\"ue_title\">Freezing point (-189 \u00b0C)<\/div>\n    \n    \n        <div class=\"ue_expand_spacing\"><\/div>\n    <div class=\"ue_expand\">\n      <div class=\"ue_expand_inside\">\n      <span class=\"uc_dactive bbb ue_accordion_icon\" ><i class='fas fa-plus'><\/i><\/span>\n      <span class=\"uc_active bbb ue_accordion_icon\"><i class='fas fa-minus'><\/i><\/span>\n      <\/div>\n    <\/div>\n        \n  <\/div>\n  <!-- end of heading -->\n  \n  \n  <div class=\"uc_content\" >\n          \n     \n    \n     \n    \n  <\/div>\n<\/div>\n\n\n<div id=\"uc_uc_icon_accordion_elementor_25dc054_item5\" class=\"uc_ac_box  elementor-repeater-item-7f77cd7\">\n  <div class=\"uc-heading uc_trigger\">\n    \n        <div class=\"ue_icon_holder\">\n      <div class=\"ue_icon\"><i class='fas fa-temperature-low'><\/i><\/div>\n    <\/div>\n    <div class=\"ue_icon_spacing\"><\/div>\n        \n    <div class=\"ue_title\">Boiling point (-186 \u00b0C)<\/div>\n    \n    \n        <div class=\"ue_expand_spacing\"><\/div>\n    <div class=\"ue_expand\">\n      <div class=\"ue_expand_inside\">\n      <span class=\"uc_dactive bbb ue_accordion_icon\" ><i class='fas fa-plus'><\/i><\/span>\n      <span class=\"uc_active bbb ue_accordion_icon\"><i class='fas fa-minus'><\/i><\/span>\n      <\/div>\n    <\/div>\n        \n  <\/div>\n  <!-- end of heading -->\n  \n  \n  <div class=\"uc_content\" >\n          \n     \n    \n     \n    \n  <\/div>\n<\/div>\n\n        <\/div>\n<\/div>\n<!-- end Icon Accordion -->\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-44655e6 e-flex e-con-boxed e-con e-parent\" data-id=\"44655e6\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Argon (Ar) https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/50.mp4 Argon is an atom, with the symbol Ar and atomic number 18 and atomic mass 39,948. It was discovered in the 19th century by Sir Rayleigh and Sir William Ramsay. It is a colorless, odorless, non-combustible and non-toxic noble gas. It is heavier than air. Air contains a concentration of approximately 0.93% [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10091,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1850","page","type-page","status-publish","has-post-thumbnail","hentry"],"featured_image_url":{"thumbnail":"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1-150x150.png","medium":"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1-300x300.png","medium_large":"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1.png","large":"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1.png","1536x1536":"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1.png","2048x2048":"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1.png","trp-custom-language-flag":"https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/Rare-Gases-7-1-12x12.png"},"post_author":"Watcharin Tameesio","assigned_categories":"","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Argon - Messer Thailand<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/messer.co.th\/en\/on-site-supply\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Argon - Messer Thailand\" \/>\n<meta property=\"og:description\" content=\"Argon (Ar) https:\/\/messer.co.th\/wp-content\/uploads\/2025\/10\/50.mp4 Argon is an atom, with the symbol Ar and atomic number 18 and atomic mass 39,948. It was discovered in the 19th century by Sir Rayleigh and Sir William Ramsay. It is a colorless, odorless, non-combustible and non-toxic noble gas. It is heavier than air. 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It was discovered in the 19th century by Sir Rayleigh and Sir William Ramsay. It is a colorless, odorless, non-combustible and non-toxic noble gas. It is heavier than air. 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