{"id":17858,"date":"2026-04-19T01:06:31","date_gmt":"2026-04-18T19:36:31","guid":{"rendered":"https:\/\/aluminiummagazine.com\/mag\/?p=17858"},"modified":"2026-04-19T01:21:12","modified_gmt":"2026-04-18T19:51:12","slug":"aluminum-hydroxide-flame-retardant-antacid","status":"publish","type":"post","link":"https:\/\/aluminiummagazine.com\/mag\/aluminium\/compounds\/aluminum-hydroxide-flame-retardant-antacid.html","title":{"rendered":"Aluminium Hydroxide (Al(OH)\u2083): The Complete Guide"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Aluminium hydroxide stands as one of the single most widely manufactured and biologically integrated aluminium compounds on the planet. Naturally abundant as the mineral gibbsite, it serves as the critical intermediate step in purifying alumina for metal production. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Away from massive industrial smelters, it acts directly as the world&#8217;s most popular over-the-counter heartburn medicine, a primary vaccine adjuvant, and an exceptionally effective, non-toxic flame retardant infused into modern building materials.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">1. <strong>Basic Identification<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Chemical Formula:<\/strong> Al(OH)\u2083<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Alternative Names:<\/strong> Aluminic acid, hydrated alumina, alumina trihydrate (ATH), gibbsite.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Molecular Weight:<\/strong> 78.00 g\/mol.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>CAS Number:<\/strong> 21645-51-2.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Appearance:<\/strong> A stark white, fluffy, non-crystalline powder, or a milky, gelatinous liquid suspension (known colloquially as \u201cmilk of alumina\u201d).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">2. <strong>Physical Properties<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike the violently reactive halides or unstable carbonates, aluminium hydroxide boasts extreme physical stability and acts as an inert solid under almost all standard conditions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 Key Data Table<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Property<\/th><th class=\"has-text-align-center\" data-align=\"center\">Aluminium Hydroxide<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Melting Point<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Decomposes at 300 \u00b0C (572 \u00b0F)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Boiling Point<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">N\/A (transforms into aluminium oxide)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Density<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">2.42 g\/cm\u00b3<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Crystal Structure<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Monoclinic (gibbsite phase)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Solubility<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Insoluble in water and alcohol. Soluble in hot strong acids or bases (amphoteric).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 Physical Description<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In its bulk manufactured powder state (ATH), it resembles fine, dense white chalk. When mixed with water, it does not dissolve but rather \u201cswells\u201d into a milky, jelly-like suspension that coats surfaces thickly \u2013 an attribute exploited in its medicinal liquids.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">3. <strong>Chemical Behavior and Reactions<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The core chemical behavior of aluminium hydroxide centers around its amphoteric nature \u2013 it acts as an acid in the presence of strong bases, and as a base in the presence of strong acids.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Thermal Decomposition (The Fire Retardant Reaction)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This is arguably its most important industrial chemical reaction.<\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>2Al(OH)\u2083 \u2192 Al\u2082O\u2083 + 3H\u2082O<\/strong><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Observation:<\/strong> At temperatures reaching 300\u202f\u00b0C (the temperature of a starting fire), aluminium hydroxide decomposes endothermically, absorbing heat energy from the fire. It releases water vapor (steam) that helps suffocate flames, while leaving behind a hard ceramic crust (Al\u2082O\u2083) that blocks further burning.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 Neutralizing Stomach Acid<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This is the mechanism behind global antacid brands.<\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>Al(OH)\u2083 + 3HCl \u2192 AlCl\u2083 + 3H\u2082O<\/strong><\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Observation:<\/strong> The milky suspension reacts smoothly with gastric acid (HCl), turning the acid into harmless water and soluble aluminum chloride.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">4. <strong>Industrial and Medical Applications<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The applications of Al(OH)\u2083 span from preserving human life to fortifying infrastructure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 Flame Retardant (Primary Industrial Use)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Alumina trihydrate (ATH) makes up nearly 50% of the entire global flame retardant market by weight. It is mixed directly as a filler powder into carpet backings, electrical cables, plastic roofing, and rubber hoses. Because it is non\u2011toxic (unlike halogenated brominated flame retardants), it is incredibly safe. In a fire, the ATH decomposes at 300\u202f\u00b0C, releasing steam that suppresses flame spread and absorbs heat.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 Antacids (Primary Medical Use)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Al(OH)\u2083 is the active ingredient in over\u2011the\u2011counter medications like Maalox and Mylanta (often paired with magnesium hydroxide). Aluminum tends to cause constipation, while magnesium causes diarrhea. Blended together, they combat heartburn without disrupting digestive flow.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.3 Bauxite Refining (The Bayer Process)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Every pound of aluminum oxide produced globally begins as aluminum hydroxide. Raw bauxite is dissolved, and pure Al(OH)\u2083 is precipitated. This sludge is then baked to drive off water, creating the alumina required for metal smelting.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4.4 Vaccine Adjuvant<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Similar to aluminum phosphate, \u201calum\u201d (specifically an aluminum hydroxide gel) is used in vaccines. It forms a gelatinous matrix that traps viral proteins, forcing the immune system to respond strongly and generate long\u2011term antibody memory.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">5. <strong>Safety and Hazard Management<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>General Safety:<\/strong> Aluminum hydroxide is considered exceedingly safe. It carries no GHS hazard statements. It is consumed orally by millions of people daily with negligible negative consequences.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 Health Effects<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Route of Exposure<\/th><th>Effect<\/th><\/tr><\/thead><tbody><tr><td><strong>Inhalation<\/strong><\/td><td>Handling bulk powder can cause lung irritation (nuisance dust limits apply). Does not cause chemical pneumonia.<\/td><\/tr><tr><td><strong>Skin Contact<\/strong><\/td><td>Harmless. Completely non\u2011irritating.<\/td><\/tr><tr><td><strong>Eye Contact<\/strong><\/td><td>Powder acts as a physical irritant similar to dirt, requiring simple flushing.<\/td><\/tr><tr><td><strong>Ingestion<\/strong><\/td><td>Safe in standard doses. Massive prolonged overdosing can interfere with dietary phosphorus absorption, leading to weakened bones (osteomalacia).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">5.2 Personal Protective Equipment (PPE)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Protection centers on industrial dust abatement.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Respiratory:<\/strong> Standard dust masks (N95) in ventilated areas.<\/li>\n\n\n\n<li><strong>Hands:<\/strong> Generic work gloves.<\/li>\n\n\n\n<li><strong>Eyes:<\/strong> Safety glasses to prevent scratching.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.3 First Aid Measures<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Eyes:<\/strong> Flush thoroughly with water.<\/li>\n\n\n\n<li><strong>Ingestion:<\/strong> Stop use if severe constipation occurs.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.4 Firefighting Information<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>This material acts as a fire extinguisher. It will not burn under any circumstances.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">6. Storage and Handling Guidelines<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">6.1 Storage Conditions<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Container:<\/strong> Multi\u2011ply paper bags or bulk sacks (FIBCs). Liquid gel in plastic drums.<\/li>\n\n\n\n<li><strong>Atmosphere:<\/strong> Normal air. Avoid freezing liquid suspensions \u2013 ice crystals break down the gel structure.<\/li>\n\n\n\n<li><strong>Location:<\/strong> Standard industrial warehousing.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">6.2 Disposal Considerations<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Solid powder can be landfilled as non\u2011hazardous industrial waste. It behaves as refined dirt and presents no leaching toxicity.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">7. <strong>Environmental Impact<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminum hydroxide is biologically benign. It is the form that aluminium naturally takes in soil (bauxite). It does not lower pH of lakes, poison aquatic life, or bioaccumulate.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">8. <strong>Comparison with Other Aluminium Compounds<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Compound<\/th><th class=\"has-text-align-center\" data-align=\"center\">Formula<\/th><th>Primary Nature<\/th><th>Heat Reaction<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Aluminium Hydroxide<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Al(OH)\u2083<\/strong><\/td><td><strong>Insoluble white powder<\/strong><\/td><td><strong>Decomposes at 300\u202f\u00b0C releasing steam.<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Aluminium Oxide<\/td><td class=\"has-text-align-center\" data-align=\"center\">Al\u2082O\u2083<\/td><td>Stable refractory<\/td><td>Melts above 2000\u202f\u00b0C; withstands fire.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Aluminium Iodide<\/td><td class=\"has-text-align-center\" data-align=\"center\">AlI\u2083<\/td><td>Violently water\u2011reactive<\/td><td>Vaporizes and decomposes.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">9. <strong>Frequently Asked Questions<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: My natural deodorant says it uses \u201calum\u201d but claims to be aluminum\u2011free. How is that possible?<\/strong><br>A: It\u2019s a marketing trick. \u201cAlum\u201d rocks are potassium aluminum sulfate. Some brands claim \u201cfree of aluminum chlorohydrate\u201d to scare buyers away from conventional deodorants, masking that they still use aluminum chemistry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: Does the aluminum in antacids enter my blood and harm my brain?<\/strong><br>A: No. The FDA has evaluated this. Because the molecule is large and insoluble, less than 0.01% of the aluminum passes through the gut wall into the bloodstream, and healthy kidneys filter it out.<\/p><div class=\"pai-ad\" style=\"min-height:250px;visibility:hidden;\"><span style=\"display: block; text-align: center; font-size: 10px; margin: 0 0 10px 0; color: #999999;\">Ads<\/span>\r\n<!-- Display-300x250-1 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:300px;height:250px\"\r\n     data-ad-client=\"ca-pub-3838168351244230\"\r\n     data-ad-slot=\"9933646018\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Q: How does a powder stop a plastic cable from catching fire?<\/strong><br>A: Engineers mix up to 50% ATH powder into the plastic before molding. When a fire occurs, the ATH decomposes into steam, cooling the plastic below its ignition point.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:75px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">10. <strong>Summary Data Sheet<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\"><strong>Chemical Name<\/strong><\/th><th class=\"has-text-align-center\" data-align=\"center\">Aluminum Hydroxide<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Common Name<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">ATH (Alumina Trihydrate)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Formula<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Al(OH)\u2083<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Appearance<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">White fluffy powder or milky gel<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Fire Behavior<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Endothermic; releases steam at 300\u202f\u00b0C<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Key Attribute<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Safe, amphoteric, flame\u2011suppressing<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Primary Utility<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">Non\u2011toxic flame retardant in plastics; human antacids<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/p><script>document.addEventListener(\"DOMContentLoaded\",function(){\n        if(window.innerWidth <= 768){\n            if (\"immediate\" === \"delay\") {\n                setTimeout(function(){document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\")},0);\n            } else if (\"immediate\" === \"scroll\") {\n                window.addEventListener(\"scroll\",function(){\n                    let s=window.scrollY\/(document.body.scrollHeight-window.innerHeight);\n                    if(s>0.1){\n                        document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n                    }\n                });\n            } else {\n                document.querySelectorAll(\".pai-ad\").forEach(el=>el.style.visibility=\"visible\");\n            }\n        } else {\n            document.querySelectorAll(\".pai-ad\").forEach(el=>el.remove());\n        }\n    });<\/script>","protected":false},"excerpt":{"rendered":"<p>Aluminium hydroxide stands as one of the single most widely manufactured and biologically integrated aluminium compounds on the planet. Naturally abundant as the mineral gibbsite, it serves as the critical intermediate step in purifying alumina for metal production. Away from massive industrial smelters, it acts directly as the world&#8217;s most popular over-the-counter heartburn medicine, a &#8230; <a title=\"Aluminium Hydroxide (Al(OH)\u2083): The Complete Guide\" class=\"read-more\" href=\"https:\/\/aluminiummagazine.com\/mag\/aluminium\/compounds\/aluminum-hydroxide-flame-retardant-antacid.html\" aria-label=\"Read more about Aluminium Hydroxide (Al(OH)\u2083): The Complete Guide\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":17963,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4155],"tags":[4141,4142],"class_list":["post-17858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-compounds","tag-aluminium-compounds","tag-aluminum-formula"],"_links":{"self":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/17858","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/comments?post=17858"}],"version-history":[{"count":0,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/posts\/17858\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media\/17963"}],"wp:attachment":[{"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/media?parent=17858"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/categories?post=17858"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminiummagazine.com\/mag\/wp-json\/wp\/v2\/tags?post=17858"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}