{"id":2087,"date":"2025-12-29T15:15:25","date_gmt":"2025-12-29T07:15:25","guid":{"rendered":"http:\/\/www.jmchemi.com\/?post_type=product&p=2087"},"modified":"2026-01-22T14:32:09","modified_gmt":"2026-01-22T06:32:09","slug":"styrene","status":"publish","type":"product","link":"https:\/\/www.jmchemi.com\/es\/producto\/styrene\/","title":{"rendered":"Estireno N\u00ba CAS 100-42-5"},"content":{"rendered":"

Also known as\u00a0vinylbenzene, it is a key monomer in the petrochemical industry, primarily used for producing polystyrene and other copolymer resins. Classified as a\u00a0Class 3 Flammable Liquid\u00a0(UN number 2055), styrene is also listed as a hazardous substance due to its flammability, reactivity, and toxicological properties.<\/p>\n

Basic Information<\/h3>\n\n\n\n\n\n\n\n\n\n
Item<\/td>\nDetails<\/td>\n<\/tr>\n
Chemical Formula<\/td>\n(C8<\/sub>H8<\/sub>)<\/td>\n<\/tr>\n
Peso molecular<\/td>\n104.15 g\/mol<\/td>\n<\/tr>\n
Appearance<\/td>\nColorless transparent liquid; sharp aromatic odor<\/td>\n<\/tr>\n
Key Physical Properties<\/td>\nMelting point: -30.6\u00b0C; boiling point: 145.2\u00b0C; density: 0.91 g\/cm\u00b3 (20\u00b0C); volatile; slightly soluble in water, miscible with ethanol, ether, acetone, and most organic solvents<\/td>\n<\/tr>\n
Purity Grades<\/td>\nIndustrial grade (\u226599.5%); polymerization-grade (\u226599.8%, low inhibitor content); reagent grade (\u226599.9%)<\/td>\n<\/tr>\n
Production Method<\/td>\nDominated by the\u00a0ethylbenzene dehydrogenation process: ethylbenzene is heated with steam in the presence of a catalyst (e.g., iron oxide) to produce styrene and hydrogen. Small-scale production also uses styrene-butadiene rubber (SBR) waste recycling.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Core Chemical Properties<\/h3>\n

High Polymerization Activity:<\/strong> Styrene has a reactive vinyl group (CH=CH2<\/sub>) that readily undergoes\u00a0free-radical polymerization\u2014even at room temperature, it can slowly polymerize into polystyrene (PS), so industrial-grade styrene is usually stabilized with inhibitors (e.g., tert-butylcatechol).<\/p>\n

Flammability:<\/strong> Highly flammable, with a flash point of 31\u00b0C and an explosive limit of 1.1%\u20136.1% (v\/v) in air. Vapors can form explosive mixtures with air and ignite when exposed to open flames, heat, or sparks.<\/p>\n

Copolymerization Capability:<\/strong> Reacts with other monomers (e.g., butadiene, acrylonitrile, maleic anhydride) to form copolymers with tailored properties, such as styrene-butadiene rubber (SBR), acrylonitrile-butadiene-styrene (ABS) plastic, and styrene-acrylic resins.<\/p>\n

Toxicity:<\/strong> Inhalation of styrene vapor or skin contact can cause irritation to the respiratory tract, eyes, and skin. Acute exposure may lead to headache, dizziness, and nausea; long-term exposure may affect the central nervous system and liver function. It is classified as a\u00a0possible human carcinogen\u00a0(Group 2B, IARC).<\/p>\n

Main Applications<\/h3>\n

Plastics Production:<\/strong> The largest application\u2014polymerizes to form\u00a0polystyrene (PS), including general-purpose polystyrene (GPS) for packaging and disposable utensils, and high-impact polystyrene (HIPS) for household appliances and toy casings.<\/p>\n

Copolymer Resins:<\/strong> A core raw material for\u00a0ABS plastic\u00a0(used in automotive parts, electronic housings, and pipes),\u00a0SAN resin\u00a0(styrene-acrylonitrile, for food containers and medical devices), and styrene-acrylic emulsions (for water-based paints and adhesives).<\/p>\n

Rubber Industry:<\/strong> Copolymerizes with butadiene to produce\u00a0styrene-butadiene rubber (SBR), the most widely used synthetic rubber for tires, conveyor belts, and seals.<\/p>\n

Other Uses:<\/strong> Used in manufacturing unsaturated polyester resins (for fiberglass-reinforced plastics), ion-exchange resins (for water treatment), and specialty coatings.<\/p>","protected":false},"excerpt":{"rendered":"

Styrene, with the chemical formula\u00a0(C8<\/sub>H8<\/sub>)\u00a0and CAS number\u00a0100-42-5, is a colorless, flammable liquid with a pungent aromatic odor. Also known as\u00a0vinylbenzene, it is a key monomer in the petrochemical industry, primarily used for producing polystyrene and other copolymer resins. Classified as a\u00a0Class 3 Flammable Liquid\u00a0(UN number 2055), styrene is also listed as a hazardous substance due to its flammability, reactivity, and toxicological properties.<\/p>","protected":false},"featured_media":3532,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","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":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-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":"","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-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":"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":""},"mobile":{"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":""}}},"product_brand":[],"product_cat":[61],"product_tag":[],"class_list":{"0":"post-2087","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-styrene","7":"desktop-align-center","8":"tablet-align-left","9":"mobile-align-left","10":"ast-product-gallery-layout-horizontal-slider","11":"ast-product-gallery-with-no-image","12":"ast-product-tabs-layout-horizontal","14":"first","15":"instock","16":"shipping-taxable","17":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/product\/2087","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/comments?post=2087"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/media\/3532"}],"wp:attachment":[{"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/media?parent=2087"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/product_brand?post=2087"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/product_cat?post=2087"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.jmchemi.com\/es\/wp-json\/wp\/v2\/product_tag?post=2087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}