{"id":364849,"date":"2026-06-10T15:04:16","date_gmt":"2026-06-10T09:34:16","guid":{"rendered":"https:\/\/forumias.com\/blog\/?p=364849"},"modified":"2026-06-10T15:04:16","modified_gmt":"2026-06-10T09:34:16","slug":"caustic-soda","status":"publish","type":"post","link":"https:\/\/forumias.com\/blog\/caustic-soda\/","title":{"rendered":"Caustic Soda"},"content":{"rendered":"<div class=\"content-box-green\">\n<p><strong>News:<\/strong> New environmental standards require caustic soda plants using membrane cell technology to pass a fish-survival test for wastewater toxicity.<\/p>\n<\/div>\n<h2 class=\"red-h2-box\">About Caustic Soda<\/h2>\n<figure style=\"width: 391px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/encrypted-tbn0.gstatic.com\/images?q=tbn:ANd9GcR4kXzrikYz_2aOta89KMdzJestGNnISIh2og&amp;s\" alt=\"Chemical structure of NaOH\" width=\"391\" height=\"129\" \/><figcaption class=\"wp-caption-text\">Source: Research Gate<\/figcaption><\/figure>\n<ul>\n<li>It is also known as <strong>sodium hydroxide (NaOH).<\/strong><\/li>\n<li><strong>Properties:<\/strong> It is a <strong>corrosive white crystalline solid.\u00a0<\/strong>\n<ul>\n<li>It is <strong>highly alkaline and readily dissolves in water, releasing hydroxide ions (OH\u207b)<\/strong> and <strong>resulting in a pH of approximately 14.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Production process:<\/strong> Commercial caustic soda is mainly produced through the<strong> chlor-alkali process<\/strong>, which involves the <strong>electrolysis of brine (sodium chloride solution).<\/strong>\n<ul>\n<li>It involves <strong>Membrane cell technology,<\/strong> which\u00a0is the m<strong>odern, energy-efficient standard for producing caustic soda <\/strong>and chlorine gas through the electrolysis of brine (saltwater).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Uses:<\/strong> It is widely used in the <strong>manufacture of soaps, rayon, paper, explosives, dyes, and petroleum products<\/strong>.\n<ul>\n<li>It is also used in <strong>cotton processing, laundering and bleaching, metal cleaning, electroplating, oxide coating, electrolytic extraction<\/strong>, and is a<strong> common ingredient in commercial drain and oven cleaners.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Production in India:<\/strong> The majority of its domestic production (non-captive) is in the<strong> Western region of the country, mainly in Gujarat, Maharashtra and Rajasthan.<\/strong>\n<ul>\n<li>India has about 32 to 37 caustic soda plants, with an annual production of more than five million metric tonnes.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2 class=\"red-h2-box\">About the New Environmental Standards<\/h2>\n<ul>\n<li>Under new environmental standards , caustic soda plants operating with<strong> membrane cell technology are required to undergo a fish-survival bioassay test <\/strong>to evaluate the toxicity of their wastewater.<\/li>\n<li>The regulations mandate that <strong>at least 90% of fish must survive after being exposed to 100% wastewater for 96 hours under laboratory conditions. <\/strong><\/li>\n<li>This test is intended <strong>to determine whether the treated effluent is harmful to aquatic life,<\/strong> beyond merely complying with individual chemical discharge limits.<\/li>\n<li>In addition, the standards<strong> prescribe specific limits for pH, chloride concentration, suspended solids, dissolved solids, water consumption, and wastewater generation.<\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>News: New environmental standards require caustic soda plants using membrane cell technology to pass a fish-survival test for wastewater toxicity. About Caustic Soda It is also known as sodium hydroxide (NaOH). Properties: It is a corrosive white crystalline solid.\u00a0 It is highly alkaline and readily dissolves in water, releasing hydroxide ions (OH\u207b) and resulting in&hellip; <a class=\"more-link\" href=\"https:\/\/forumias.com\/blog\/caustic-soda\/\">Continue reading <span class=\"screen-reader-text\">Caustic Soda<\/span><\/a><\/p>\n","protected":false},"author":10366,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[1566,4182,1738,12039],"tags":[11872,10504],"class_list":["post-364849","post","type-post","status-publish","format-standard","hentry","category-daily-factly-articles","category-environment","category-science-and-technology-daily-factly-articles","category-knolls","tag-9pm-daily-factly","tag-down-to-earth","entry"],"jetpack_featured_media_url":"","views":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/364849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/users\/10366"}],"replies":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/comments?post=364849"}],"version-history":[{"count":0,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/364849\/revisions"}],"wp:attachment":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/media?parent=364849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/categories?post=364849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/tags?post=364849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}