{"id":4904,"date":"2021-12-09T14:42:06","date_gmt":"2021-12-09T14:42:06","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=4904"},"modified":"2026-04-28T10:41:52","modified_gmt":"2026-04-28T10:41:52","slug":"how-to-store-laboratory-chemical-reagents","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/how-to-store-laboratory-chemical-reagents\/","title":{"rendered":"Como armazenar reagentes qu\u00edmicos de laborat\u00f3rio?"},"content":{"rendered":"<h1><strong>Como armazenar reagentes qu\u00edmicos de laborat\u00f3rio?<\/strong><\/h1>\n\n<!-- lc-qa-start -->\n<p><strong>Quick answer:<\/strong> Specialty industrial chemicals are usually evaluated by purity, process fit, compliance, and how stable the material stays in the intended formulation or manufacturing route. The best purchase decision is usually made after both specification review and application validation.<\/p>\n<!-- lc-qa-end -->\n\n\n\n<p>Os reagentes qu\u00edmicos devem ser armazenados adequadamente, pois a qualidade dos reagentes afeta diretamente a precis\u00e3o dos resultados experimentais. Os reagentes qu\u00edmicos geralmente se deterioram devido ao armazenamento inadequado durante o armazenamento. Alguns reagentes s\u00e3o f\u00e1ceis de absorver umidade e deliquescer ou hidrolisar; alguns reagem facilmente com oxig\u00eanio, di\u00f3xido de carbono ou outros gases difundidos no ar, e alguns reagentes se deterioram devido \u00e0 influ\u00eancia da luz e da temperatura ambiente. Portanto, medidas correspondentes devem ser tomadas para armazenar adequadamente os reagentes de acordo com as diferentes propriedades dos reagentes.<\/p>\r\n\r\n\r\n\r\n<p>Os reagentes qu\u00edmicos sofrem interfer\u00eancia inevit\u00e1vel de condi\u00e7\u00f5es externas durante o processo de armazenamento. \u00c9 preciso conseguir oito prote\u00e7\u00f5es no laborat\u00f3rio: antivol\u00e1til, antiumidade, anti-deteriora\u00e7\u00e3o, anti-luz, anti-envenenamento, anti-choque, anti-fogo e anti-rato.<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>Anti-volatiliza\u00e7\u00e3o<\/li>\r\n<li>Veda\u00e7\u00e3o de \u00f3leo: am\u00f4nia, \u00e1cido clor\u00eddrico concentrado, \u00e1cido n\u00edtrico concentrado e outros l\u00edquidos inorg\u00e2nicos vol\u00e1teis, coloque de 10 a 20 gotas de \u00f3leo mineral na superf\u00edcie do l\u00edquido para evitar a volatiliza\u00e7\u00e3o (n\u00e3o h\u00e1 \u00f3leo vegetal dispon\u00edvel).<\/li>\r\n<li>Selo de \u00e1gua: adicione 5 ml de \u00e1gua ao dissulfeto de carbono, que pode ser armazenado por um longo per\u00edodo. A \u00e1gua \u00e9 adicionada ao merc\u00fario para evitar que o vapor de merc\u00fario entre no ar. Um pouco de p\u00f3 de enxofre foi colocado ao lado do merc\u00fario, mas, uma vez perdido, o p\u00f3 de enxofre foi espalhado para eliminar o merc\u00fario na rea\u00e7\u00e3o qu\u00edmica.<\/li>\r\n<li>Veda\u00e7\u00e3o com cera: \u00e9ter, etanol, \u00e1cido f\u00f3rmico e outros l\u00edquidos vol\u00e1teis mais leves que a \u00e1gua ou facilmente sol\u00faveis, bem como s\u00f3lidos vol\u00e1teis, como naftaleno e iodo, tampe bem o frasco e cubra a boca com cera. Al\u00e9m da veda\u00e7\u00e3o com cera do frasco original de bromo, o frasco original deve ser colocado em um tubo pl\u00e1stico com carv\u00e3o ativado e a boca do tubo deve ser vedada com cera.<\/li>\r\n<li>\u00c0 prova de umidade<\/li>\r\n<li>O p\u00f3 branqueador e o per\u00f3xido de s\u00f3dio devem ser vedados para evitar a decomposi\u00e7\u00e3o por absor\u00e7\u00e3o de \u00e1gua ou a explos\u00e3o por absor\u00e7\u00e3o de \u00e1gua. <a href=\"https:\/\/longchangchemical.com\/pt\/product\/liquid-sodium-silicate-cas-1344-09-8\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>S\u00f3dio<\/strong><\/a> O hidr\u00f3xido de s\u00f3dio \u00e9 f\u00e1cil de absorver \u00e1gua e deliquescer, por isso deve ser vedado. O nitrato de am\u00f4nio e o sulfato de s\u00f3dio absorvem facilmente a \u00e1gua e n\u00e3o podem ser derramados, o que pode causar a ruptura do frasco do reagente. Eles tamb\u00e9m devem ser bem vedados.<\/li>\r\n<li>O carbeto de c\u00e1lcio, o sulfato de cobre anidro, o pent\u00f3xido de f\u00f3sforo e o gel de s\u00edlica absorvem facilmente a \u00e1gua e se deterioram, e o f\u00f3sforo vermelho \u00e9 facilmente oxidado. Em seguida, ele absorve \u00e1gua para gerar \u00e1cido metafosf\u00f3rico. Todos os itens acima devem ser armazenados em um dessecador.<\/li>\r\n<li>Embora o \u00e1cido sulf\u00farico concentrado deva ser herm\u00e9tico para evitar a absor\u00e7\u00e3o de \u00e1gua, ele deve ser colocado em um frasco de boca mo\u00edda porque \u00e9 comumente usado.<\/li>\r\n<li>No por\u00e3o do \"medicamento especial\", a camada inferior do tecido \u00e9 cinza, a camada intermedi\u00e1ria \u00e9 revestida com cal apagada e a camada superior \u00e9 revestida com papel alcatroado de camada dupla antes que o medicamento possa ser armazenado.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p>Tr\u00eas, evitar a deteriora\u00e7\u00e3o<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>Anti-oxida\u00e7\u00e3o: O sulfito de s\u00f3dio, o sulfato ferroso e o tiossulfato de s\u00f3dio s\u00e3o facilmente oxidados, e a boca do frasco deve ser revestida com cera.<\/li>\r\n<li>Anti-carbonata\u00e7\u00e3o: <a href=\"https:\/\/longchangchem.com\/\"><strong>Silicato de s\u00f3dio<\/strong><\/a>O per\u00f3xido de s\u00f3dio, o per\u00f3xido de s\u00f3dio e o c\u00e1ustico absorvem facilmente o di\u00f3xido de carbono e devem ser revestidos com cera.<\/li>\r\n<li>Prote\u00e7\u00e3o contra intemp\u00e9ries: O carbonato de s\u00f3dio cristalino e o sulfato de cobre cristalino devem ser selados e armazenados no por\u00e3o.<\/li>\r\n<li>Anti-decomposi\u00e7\u00e3o: O bicarbonato de am\u00f4nio e o \u00e1cido n\u00edtrico concentrado s\u00e3o f\u00e1ceis de decompor quando aquecidos e devem ser armazenados no por\u00e3o ap\u00f3s o revestimento de cera.<\/li>\r\n<li>O carv\u00e3o ativado pode absorver uma variedade de gases e se deteriorar (o carv\u00e3o tamb\u00e9m \u00e9 igual), portanto, deve ser colocado em um dessecador.<\/li>\r\n<li>O f\u00f3sforo amarelo \u00e9 f\u00e1cil de se inflamar espontaneamente em contato com o ar. Mantenha-o na \u00e1gua para sempre. Verifique a \u00e1gua a cada 15 dias: adicione \u00e1gua ao frasco de reagente de f\u00f3sforo, coloque-o no dreno que cont\u00e9m a \u00e1gua e feche-o com um sino.<\/li>\r\n<li>O pot\u00e1ssio e o s\u00f3dio s\u00e3o armazenados no querosene.<\/li>\r\n<li>Adicione algumas gotas de \u00e1cido sulf\u00farico dilu\u00eddo \u00e0 solu\u00e7\u00e3o de sulfato ferroso, adicione o excesso de p\u00f3 de ferro fino e sele com cera.<\/li>\r\n<li>A solu\u00e7\u00e3o de glicose \u00e9 propensa a mofo, basta adicionar algumas gotas de formalde\u00eddo para salv\u00e1-la.<\/li>\r\n<li>O formalde\u00eddo \u00e9 f\u00e1cil de polimerizar. Uma pequena quantidade de metanol deve ser adicionada imediatamente ap\u00f3s a abertura do frasco; o etanol deve ser adicionado ao acetalde\u00eddo.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p>Quatro, anti-luz<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>O nitrato de prata, o \u00e1cido n\u00edtrico concentrado e a maioria dos medicamentos org\u00e2nicos devem ser colocados em frascos marrons;<\/li>\r\n<li>O nitrato \u00e9 armazenado no por\u00e3o para evitar calor, luz, fogo e choque;<\/li>\r\n<li>Todas as vitrines de reagentes org\u00e2nicos s\u00e3o pintadas com tinta preta;<\/li>\r\n<li>Cortinas de tecido colorido para uso em laborat\u00f3rio, preto infravermelho interno de camada dupla;<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p>Cinco, anti-envenenamento<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>F\u00f3sforo, nitrato de prata, clorato de pot\u00e1ssio, cloreto de merc\u00fario e outras subst\u00e2ncias altamente t\u00f3xicas s\u00e3o colocadas no por\u00e3o, com fechadura dupla para duas pessoas, arquivos s\u00e3o estabelecidos, enviados para aprova\u00e7\u00e3o, registros de uso e inspe\u00e7\u00f5es regulares.<\/li>\r\n<li>O fosfeto de c\u00e1lcio e o fosfeto de alum\u00ednio liberam fosfina altamente t\u00f3xica ap\u00f3s a absor\u00e7\u00e3o de \u00e1gua. Eles devem ser armazenados em um dessecador e rotulados com uma etiqueta vermelha.<\/li>\r\n<li>Como n\u00e3o h\u00e1 capela de exaust\u00e3o, a cal \u00e9 frequentemente colocada no ch\u00e3o para adsorver certas subst\u00e2ncias venenosas da fase gasosa.<\/li>\r\n<li>Para medicamentos corrosivos, como \u00e1cido concentrado, \u00e1lcali concentrado, bromo, fenol, etc., os r\u00f3tulos vermelhos s\u00e3o usados como advert\u00eancia.<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p>Sexto, \u00e0 prova de choque<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>O nitrato de am\u00f4nio \u00e9 f\u00e1cil de explodir quando agitado, portanto, coloque-o no por\u00e3o.<\/li>\r\n<li>O al\u00famen de cristal grande caseiro e o sulfato de cobre de cristal grande s\u00e3o embalados em um frasco de reagente de boca grande com uma almofada de papel macio, tamponados e numerados na cozinha de acordo com o \"n\u00famero de quatro d\u00edgitos\".<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p>Sete, preven\u00e7\u00e3o de inc\u00eandios<\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>Instale um tanque de \u00e1gua, um balde de inc\u00eandio, um tanque de areia, um extintor de inc\u00eandio de espuma e um frasco de tetracloreto de carbono na \"porta\", em um local \"vis\u00edvel\" e \"f\u00e1cil\" da sala de instrumentos. O medicamento do extintor de inc\u00eandio de espuma \u00e9 renovado uma vez por ano. (Se houver um extintor de inc\u00eandio \"CCl4\" ou \"1211\", \u00e9 melhor).<\/li>\r\n<li>Todos os fios internos devem ser substitu\u00eddos por fios escuros para evitar a fumiga\u00e7\u00e3o de medicamentos, curto-circuito e fuga de inc\u00eandio.<\/li>\r\n<li>Anti-rato<\/li>\r\n<li>Ajuste adequadamente mais fenol na pasta.<\/li>\r\n<li>Para o medicamento \"indicador\", coloque alguns medicamentos vol\u00e1teis, como formalde\u00eddo, sab\u00e3o de cresol, etc. Em um arm\u00e1rio com graves danos causados por roedores, o \u00e1cido clor\u00eddrico concentrado e a am\u00f4nia concentrada podem ser armazenados alternadamente. Usado para proteger outros medicamentos.<\/li>\r\n<li>Aplique pasta de acetato de chumbo nas quatro paredes da boca do camundongo. Quando o camundongo entrar e sair, ele contaminar\u00e1 a pele, lamber\u00e1 e matar\u00e1 (o acetato de chumbo \u00e9 doce e altamente t\u00f3xico).<\/li>\r\n<\/ol>\r\n\n\n<!-- lc-commercial-start -->\n<h2>A practical sourcing checklist for specialty chemical applications<\/h2>\n<p>Specialty-chemical purchasing usually goes more smoothly when teams define the end-use risk first and then verify purity, compatibility, processing behavior, and regulatory fit as one package. That often prevents expensive rework after the material reaches production or customer testing.<\/p>\n<ul>\n<li><strong>Start from the end-use standard:<\/strong> food contact, plastics, coatings, preservation, and industrial processing all create different specification priorities.<\/li>\n<li><strong>Check compatibility in the real system:<\/strong> a compliant material can still be the wrong commercial choice if it destabilizes the formulation or process.<\/li>\n<li><strong>Review handling and storage:<\/strong> some specialty chemicals succeed or fail based on how they behave during blending, transport, or long-term storage.<\/li>\n<li><strong>Use sample validation before scale-up:<\/strong> pilot checks on the intended formula or production step usually save the most time and cost.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/light-soda-ash-cas-497-19-8\/\">Industrial Grade Light Soda Ash<\/a>:<\/strong> A direct sourcing reference when sodium-carbonate grade and application fit are under review.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why is specification matching not enough for specialty chemicals?<\/strong><br \/>Because a material can meet the basic spec and still fail in the actual formulation, process, or downstream compliance requirement.<\/p>\n<p><strong>Should price be the first filter for specialty raw materials?<\/strong><br \/>Price matters, but technical fit, compliance, and process reliability usually decide whether the material is truly economical in use.<\/p>\n<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>Chemical reagents must be stored properly, because the quality of the reagents directly affects the accuracy of the experimental results. Chemical reagents often deteriorate due to improper storage during storage.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[],"class_list":["post-4904","post","type-post","status-publish","format-standard","hentry","category-laboratory-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to store laboratory chemical reagents? - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"Chemical reagents must be stored properly, because the quality of the reagents directly affects the accuracy of the experimental results. 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