{"id":33275,"date":"2021-03-16T12:51:23","date_gmt":"2021-03-16T12:51:23","guid":{"rendered":"https:\/\/www.alquera.com\/?page_id=33275"},"modified":"2021-09-12T13:46:10","modified_gmt":"2021-09-12T13:46:10","slug":"usos","status":"publish","type":"page","link":"https:\/\/www.alquera.com\/pt\/acido-oxalico\/usos\/","title":{"rendered":"Utiliza \u00c1cido Ox\u00e1lico"},"content":{"rendered":"<p>O\u00a0<a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/\"><strong>\u00e1cido ox\u00e1lico<\/strong><\/a>\u00a0\u00e9 um \u00e1cido carbox\u00edlico com a f\u00f3rmula H<sub>2<\/sub>C<sub>2<\/sub>O<sub>4<\/sub>\u00a0tamb\u00e9m pode ser descrito como HOOCCOOH, \u00e9 um \u00e1cido org\u00e2nico saturado, corrente normal, considerado muito forte. Entre as suas propriedades mais importantes, \u00e9 sol\u00favel em \u00e1lcool e \u00e1gua, cristaliza-se em \u00e1gua sob forma di-hidratada com a f\u00f3rmula C<sub>2<\/sub>H<sub>2<\/sub>O<sub>4<\/sub>.2H<sub>2<\/sub>O, o seu ponto de fus\u00e3o hidratado \u00e9 101,5\u00a0<sup>0<\/sup>C. Quando aquecido, decomp\u00f5e-se, libertando di\u00f3xido de carbono (CO<sub>2<\/sub>), mon\u00f3xido de carbono (CO) e \u00e1gua.<\/p>\n<p><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/usos\/acido-oxalico-2\/\" rel=\"attachment wp-att-33305\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-33305 aligncenter\" src=\"https:\/\/www.alquera.com\/wp-content\/uploads\/2021\/03\/ACIDO-OXALICO.png\" alt=\"usos \u00e1cido ox\u00e1lico\" width=\"300\" height=\"214\" \/><\/a><\/p>\n<p>Ocorre naturalmente como oxalato de c\u00e1lcio ou pot\u00e1ssio, nas ra\u00edzes e rizomas de muitas plantas, est\u00e1 presente em pequenas quantidades em muitos alimentos, tais como cacau, nozes, feij\u00f5es e tamb\u00e9m nas folhas de muitas plantas tais como espinafres, salsa, acelgas, etc....<\/p>\n<p>Existem v\u00e1rias formas de produzir \u00e1cido ox\u00e1lico industrialmente, uma delas \u00e9 por oxida\u00e7\u00e3o de hidratos de carbono como o amido, tamb\u00e9m pode ser produzido com mon\u00f3xido de carbono e hidr\u00f3xido de s\u00f3dio, mas as mais utilizadas industrialmente s\u00e3o as primeiras com duas oxida\u00e7\u00f5es sucessivas, utilizando \u00e1cido n\u00edtrico e oxig\u00e9nio do ar, e a segunda com metanoato de s\u00f3dio.<\/p>\n<p>As suas principais caracter\u00edsticas f\u00edsicas s\u00e3o: sabor amargo, s\u00f3lido cristalino incolor, parcialmente sol\u00favel em \u00e1gua, etanol e solventes.<\/p>\n<h2>Usos do \u00e1cido ox\u00e1lico<\/h2>\n<p>Entre as principais utiliza\u00e7\u00f5es e aplica\u00e7\u00f5es de\u00a0<b>\u00e1cido ox\u00e1lico di-hidratado<\/b>\u00a0s\u00e3o:<\/p>\n<ul>\n<li>Tratamento de superf\u00edcies met\u00e1licas.<\/li>\n<li><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/quitar-oxido\/\">Remo\u00e7\u00e3o de ferrugem em metais<\/a>especialmente em pe\u00e7as cromadas, amplamente utilizadas em bicicletas.<\/li>\n<li>Na constru\u00e7\u00e3o, \u00e9 utilizado para\u00a0<a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/pulir-suelos\/\">pavimentos de polir<\/a>m\u00e1rmore e outras superf\u00edcies.<\/li>\n<li>Na navega\u00e7\u00e3o, para <a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/limpieza-fibra-vidrio\/\">limpeza com fibra de vidro<\/a>.<\/li>\n<li>Em\u00a0<a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/apicultura\/\">apicultura<\/a>\u00a0erradica o \u00e1caro varroa que ataca as abelhas.<\/li>\n<li>Branqueamento e protec\u00e7\u00e3o de t\u00eaxteis, madeira e couro.<\/li>\n<li>Fixa\u00e7\u00e3o de tinturas no tecido de l\u00e3.<\/li>\n<li>Fabrico de pl\u00e1sticos.<\/li>\n<li>Na gravimetria, \u00e9 utilizado para a precipita\u00e7\u00e3o de prata, ouro, cobre, merc\u00fario, etc.<\/li>\n<li>Como agente de limpeza para casas de banho, cozinhas, azulejos, pavimentos, etc., em casas de banho e na ind\u00fastria.<\/li>\n<li>Na lavandaria, \u00e9 utilizada para remo\u00e7\u00e3o de n\u00f3doas e branqueamento.<\/li>\n<\/ul>\n<h2>Propriedades F\u00edsicas\/Qu\u00edmicas<\/h2>\n<table>\n<tbody>\n<tr>\n<th class=\"cabecera qu\u00edmica\" colspan=\"3\">\n<div class=\"noprint\"><\/div>\n<div class=\"noprint\"><\/div>\n<p>\u00c1CIDO OX\u00c1LICO OU \u00c1CIDO ETANODI\u00d3ICO<\/th>\n<\/tr>\n<tr>\n<th colspan=\"3\">F\u00d3RMULA QU\u00cdMICA<\/th>\n<\/tr>\n<tr>\n<th scope=\"row\">F\u00d3RMULA SEMI-DESENVOLVIDA<\/th>\n<td colspan=\"2\">HOOC-COOH<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">F\u00d3RMULA MOLECULAR<\/th>\n<td colspan=\"2\">C<sub>2<\/sub>H<sub>2<\/sub>O<sub>4<\/sub><\/td>\n<\/tr>\n<tr>\n<th colspan=\"3\">IDENTIFICADORES<\/th>\n<\/tr>\n<tr>\n<th scope=\"row\">N\u00daMERO DO CAS<\/th>\n<td colspan=\"2\">144-62-7<\/td>\n<\/tr>\n<tr>\n<th colspan=\"3\">PROPRIEDADES F\u00cdSICAS<\/th>\n<\/tr>\n<tr>\n<th scope=\"row\">APEARAN\u00c7A<\/th>\n<td colspan=\"2\">Cristais\/poeiras brancas<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">DENSIDADE<\/th>\n<td colspan=\"2\">1900 kg\/m<sup>3<\/sup>1,9 g\/cm<sup>3<\/sup><\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">MASSA MOLAR<\/th>\n<td colspan=\"2\">90.03 g\/mol<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">PONTO DE CONFER\u00caNCIA<\/th>\n<td colspan=\"2\">374,65 K (102 \u00b0C)<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">PONTO DE COZEDURA<\/th>\n<td colspan=\"2\">638,15 K (365 \u00b0C)<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">PONTO DE DECOMPOSI\u00c7\u00c3O<\/th>\n<td colspan=\"2\">462,65 K (190 \u00b0C)<\/td>\n<\/tr>\n<tr>\n<th colspan=\"3\">PROPRIEDADES QU\u00cdMICAS<\/th>\n<\/tr>\n<tr>\n<th scope=\"row\">ACIDEZ<\/th>\n<td colspan=\"2\">1,19 pK<sub>a<\/sub><\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">SOLUBILIDADE EM \u00c1GUA<\/th>\n<td colspan=\"2\">9,5 g\/100 mL (15 \u00b0C)<\/td>\n<\/tr>\n<tr>\n<th colspan=\"3\"><\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h2>Precau\u00e7\u00f5es de utiliza\u00e7\u00e3o\u00a0<strong>de \u00e1cido ox\u00e1lico di-hidratado<\/strong><\/h2>\n<p>Embora a sua utiliza\u00e7\u00e3o seja muito comum, deve ser tido em conta que estamos a falar de um \u00e1cido, pelo que devem ser tomadas todas as precau\u00e7\u00f5es necess\u00e1rias no seu manuseamento, usando sempre luvas e evitando qualquer contacto com o material. Provoca fortes irrita\u00e7\u00f5es na boca, es\u00f3fago, est\u00f4mago e provoca danos renais, em doses elevadas \u00e9 letal porque cria obstru\u00e7\u00e3o e convuls\u00f5es renais, \u00e9 o principal componente dos c\u00e1lculos renais. \u00c9 facilmente absorvido atrav\u00e9s das membranas mucosas e da pele, causando dist\u00farbios da circula\u00e7\u00e3o sangu\u00ednea e danos renais. \u00c9 um irritante ocular grave e o contacto prolongado causa danos irrevers\u00edveis.<\/p>\n<h3 class=\"widget-title\">Comprar <\/h3><div><div class=\"woocommerce\"><ul class=\"products columns-4\">\n<li class=\"desktop-align-left tablet-align-left mobile-align-left ast-product-gallery-layout-horizontal-slider ast-magnify-disabled ast-product-single-variable ast-product-tabs-layout-horizontal ast-qv-on-image product type-product post-495 status-publish first instock product_cat-productos-experimentos product_cat-productos has-post-thumbnail taxable shipping-taxable purchasable product-type-variable has-default-attributes\">\n\t<a href=\"https:\/\/www.alquera.com\/pt\/permanganato-de-potasio\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.alquera.com\/wp-content\/uploads\/2016\/01\/permanganato-200g-foto-nueva-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"permanganato 200g\" srcset=\"https:\/\/www.alquera.com\/wp-content\/uploads\/2016\/01\/permanganato-200g-foto-nueva-300x300.png 300w, https:\/\/www.alquera.com\/wp-content\/uploads\/2016\/01\/permanganato-200g-foto-nueva-150x150.png 150w, https:\/\/www.alquera.com\/wp-content\/uploads\/2016\/01\/permanganato-200g-foto-nueva-12x12.png 12w, https:\/\/www.alquera.com\/wp-content\/uploads\/2016\/01\/permanganato-200g-foto-nueva-100x100.png 100w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Permanganato de Pot\u00e1ssio<\/h2><div class=\"review-rating\"><div class=\"star-rating\"><span style=\"width:100%\" data-no-translation=\"\" data-trp-gettext=\"\">Classificado <strong class=\"rating\">5.00<\/strong> em 5<\/span><\/div><\/div>\n<\/a><a href=\"https:\/\/www.alquera.com\/pt\/permanganato-de-potasio\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_495\" data-quantity=\"1\" class=\"button product_type_variable add_to_cart_button\" data-product_id=\"495\" data-product_sku=\"AL100111\" aria-label=\"Seleccione as op\u00e7\u00f5es para \u201cPermanganato de Potasio\u201d\" rel=\"nofollow\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\">Ver op\u00e7\u00f5es<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_495\" class=\"screen-reader-text\">\n\t\tEste produto tem v\u00e1rias variantes. As op\u00e7\u00f5es podem ser seleccionadas na p\u00e1gina do produto\t<\/span>\n<\/li>\n<\/ul>\n<\/div><\/div>\n<p class=\"widget-title\">Leia mais<\/p><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/\">\u00c1cido ox\u00e1lico<\/a>\n<!-- Page-list plugin v.5.9 wordpress.org\/plugins\/page-list\/ -->\n<ul class=\"page-list siblings-page-list\">\n<li class=\"page_item page-item-33282 menu-item\"><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/apicultura\/\" class=\"menu-link\">\u00c1cido ox\u00e1lico na apicultura<\/a><\/li>\n<li class=\"page_item page-item-33336 menu-item\"><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/limpieza-fibra-vidrio\/\" class=\"menu-link\">Limpeza em fibra de vidro<\/a><\/li>\n<li class=\"page_item page-item-33280 menu-item\"><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/pulir-suelos\/\" class=\"menu-link\">Polimento de pisos com \u00e1cido ox\u00e1lico<\/a><\/li>\n<li class=\"page_item page-item-33277 menu-item\"><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/quitar-oxido\/\" class=\"menu-link\">Remo\u00e7\u00e3o da ferrugem do \u00e1cido ox\u00e1lico<\/a><\/li>\n<li class=\"page_item page-item-33275 menu-item\"><a href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/usos\/\" class=\"menu-link\">Utiliza \u00c1cido Ox\u00e1lico<\/a><\/li>\n\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>El\u00a0acido ox\u00e1lico\u00a0es un acido carbox\u00edlico cuya f\u00f3rmula es H2C2O4\u00a0tambi\u00e9n se le puede describir como HOOCCOOH, es un \u00e1cido org\u00e1nico saturado, de cadena normal, considerado muy fuerte. Entre sus propiedades m\u00e1s importantes tenemos que es soluble en el alcohol y agua, cristaliza en el agua en forma dihidratada cuya f\u00f3rmula es C2H2O4.2H2O, su punto de fusi\u00f3n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":33273,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-33275","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Usos \u00c1cido Ox\u00e1lico - Alquera.com<\/title>\n<meta name=\"description\" content=\"Usos del \u00e1cido ox\u00e1lico, adem\u00e1s de los usos industriales tiene varias aplicaciones pr\u00e1cticas que te explicamos a continuaci\u00f3n.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/usos\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Usos \u00c1cido Ox\u00e1lico\" \/>\n<meta property=\"og:description\" content=\"Usos del \u00e1cido ox\u00e1lico, adem\u00e1s de los usos industriales tiene varias aplicaciones pr\u00e1cticas que te explicamos a continuaci\u00f3n.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alquera.com\/pt\/acido-oxalico\/usos\/\" \/>\n<meta property=\"og:site_name\" content=\"Alquera.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/alqueraciencia\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-12T13:46:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.alquera.com\/wp-content\/uploads\/2021\/03\/ACIDO-OXALICO.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.alquera.com\/acido-oxalico\/usos\/\",\"url\":\"https:\/\/www.alquera.com\/acido-oxalico\/usos\/\",\"name\":\"Usos \u00c1cido Ox\u00e1lico - 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