Polyurethane chemical formula Urethane is obtained by the formal condensation of ethyl alcohol with carbamic acid. What is polyurethane?Polyurethane is a polymer material formed as a result of the reaction of monomers - isocyanate and polyol. Phone: +86 18813800209 Email:marketing@doxuchem. NH 2 COOC 2 H5 is the basic or chemical formula of Urethane. This procedure involves the reaction between a polyol, which has multiple reactive hydroxyl (-OH) groups, and a diisocyanate, which contains two isocyanate (-NCO) groups. Its chemical formula is C 3 H 7 NO 2. [49] As the chemicals mix, a chemical reaction begins, creating a polyurethane foam that expands at varying rates based on the formula. Diisocyanates consist of two isocyanate groups -N=C=O, and they react with polyols – a type of polyether or polyester, leading to the formation of polyurethane. Polyurethane (/ ˌ p ɒ l i ˈ jʊər ə ˌ θ eɪ n,-j ʊəˈr ɛ θ eɪ n /; [1] often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links. Noteworthy points reading the formulations are explained. 314-321, Innovation Building, Hi-tech Ecological Park, Panyu Avenue North, Panyu Polyurethane Insulation Thermal conductivity - k-values - vs. Given their advantageous characteristics, polyurethane composites have been successfully utilized in various fields: Chemical Structure of Polyurethane. Polyurethane foam is sprayed over the surface of the prepared substrate. Chemical resistance: Polyurethane sealants can withstand exposure to various chemicals and solvents, enhancing their durability in challenging environments. Chemistry of Polyurethane Elastomers. 4]. Some examples include: automotive, wires and cables, The molecular or chemical formula of Urethane is C 3 H 7 NO 2. Urethane, also known as ethyl carbamate, is a chemical compound with the formula C2H5OC(O)NH2. Find out how polyurethane is used in foams, elastomers, adhesives, coatings, and sealants, and its environmental impact and recycling. It is widely used as an antineoplastic agent, an intermediate during organic synthesis, and veterinary anaesthetic. Thermoplastic Polyurethane, commonly referred to as TPU, is a versatile type of plastic often used in a wide range of applications due to its unique set of properties. Formula: C 3 H 7 NO 2; Molecular weight: 89. This process involves creating urethane linkages (-NH-CO-O-), hence the name polyurethane. Its chemical structure offers both the high elasticity of rubbers and the mechanical strength of plastics, making it an attractive choice in several industries. Calculations, formulating and formulations for polyurethanes". It is primarily used in the production of amino resins, but it is also used in the production of pesticides, fumigants, cosmetics, and medications. Physical properties 10 5. These groups, called urethane, are produced through a chemical reaction between a diisocyanate and a polyol. It is a highly effective insulation material, commonly used in building and construction for its excellent heat insulation, air sealing, and moisture barrier properties. That is why our company is committed to provide chemicals than can be used in various industries for a wide range of purposes. Urethane | NH2COOC2H5 or C3H7NO2 | CID 5641 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities Because a variety of diisocyanates and a wide range of polyols can be used to produce polyurethane, a broad spectrum of materials can be produced to meet the needs of specific applications. This reaction results in the formation of a segmented Polyurethane foam chemical formula is C 27 H 36 N 2 O 10. Furthermore, a section is dedicated to explaining the structure–property relationship. Rubbers and Elastomers - Chemical Resistance Jan 1, 2015 · Polyurethane properties are largely determined by the chemical nature of the polymer building blocks, the stoichiometry of the isocyanate/hydroxyl (–OH) components, and the density, all of which can be varied to produce polymers with the desired property profile. On the other hand, polyurethane is a polymer made through the polymerization process, linking multiple urethane units (monomers) together. Urethane is also known as ethyl carbamate. Take thermoset polyurethanes as an example. We believe that advancements in science and technology should be aimed for goodness. PP Polypropylene - Chemical Resistance Chemical resistance of Polypropylene - PP - to acids, bases, organic substances and solvents. The chemical structure of polyurethane is typically formed by the reaction of a diisocyanate with a polyol. Over three quarters of the global consumption of polyurethane products is in the form of foams, with flexible and rigid types being roughly equal in market size. They are all colorless or white oils or Polyurethane slab making formula, also known as polyurethane foam slabs or PU slabs, refer to solid blocks or sheets of polyurethane foam. The chemical formula is C 27 H 36 N 2 O 10 “. TDI is also used in the production of adhesives, coatings, sealants, and elastomers (CASE). 1084; EINECS:210-898-8 The physical and chemical property of 9009-54-5 is provided by ChemNet. polyurethane closed cell pu foam component chemicals AB raw material. It is a translation based on the content of corporate PR magazine “Sanyo Chemical News” issued in Autumn 2017. Guangdong chemical factory selling polyurethane foam flexible foaming system formula Mehdi Panahi, in Journal of Environmental Chemical Engineering, 2018. The 2D chemical structure image of urethane is also called skeletal formula, which is the standard notation for organic molecules. Their use ranges from everyday items to advanced engineering applications. different chemical approaches and their characteristics. What is the use of polyurethane sealant? These sealants dry quickly and moisture-curing, which are What is thermoplastic polyurethane (TPU)? Thermoplastic polyurethane (TPU) is a melt-processable thermoplastic elastomer with high durability and flexibility. The molecular or chemical formula of Urethane is C 3 H 7 NO 2 . 4 (Windows); 1. Technically, they are thermoplastic elastomers consisting of linear segmented block copolymers composed of hard and soft segments. The reaction of isocyanates and water to form urea is essential to many polyurethane industrial applications. These approaches include epoxidation/ring opening, hydroformylation, ozonolysis, and thiol-ene. 3 %âãÏÓ 1 0 obj >stream Eram Sharmin and Fahmina Zafar Polyurethane: An Introduction application/pdf Acrobat Distiller 10. The chemical formation of polyurethane elastomers involves a process known as step-growth polymerization or polyaddition. It is odourless and tastes like saline. Chemex Chemicals is a Leading Importer, Distributor & Supplier of Chemicals in India. Polyurethane is an organic polymer that features many organic units linked via urethane molecules. Chemical properties 14 6. from publication: Polyurethane Impregnation for Improving the Mechanical and the Water Resistance of Polypropylene-Based Textiles Polyurethane Group TS - Thermosets General Properties Chemical Formula Structural Formula. What is the chemical formula of polyurethane? The chemical formula of polyurethane can be represented as [-NH-CO-O-]n, where ‘n’ denotes the number of repeating units in the polymer chain. Polyurethane products have many uses. These grouts range in density from 2 pcf to 12 pcf and expand, exerting approximately ten psi of pressure, enough to move a concrete slab. Gap-filling ability: They can fill gaps and irregularities between materials, creating a watertight and airtight seal. TPU from Huntsman 8 4. Cooling saline taste. Jul 26, 2024 · Polyurethane (CAS 9009-54-5) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices Polyurethane Chemical . It is an organic compound that consists of an isocyanate group (-NCO) and an alcohol group (-OH) and is often used in the production of various polymers and coatings. Polyurethane foam is formulated in different ways for different uses. Polyurethane is a polymer. This is commonly achieved by adding small amounts of water, which reacts with isocyanates to form CO 2 gas and an amine, via an unstable carbamic acid group. 98-$3. Polyurethane foam Polyurethane foam is a porous resin made by foaming a polymer obtained by chemically reacting polyol and polyisocyanate components with gas (carbon dioxide) generated simultaneously with the reaction [Fig. The polyurethane foam is coated with acrylic, urethane, or silicone rubber coatings. Polyurethane foam is the result of a chemical reaction when its two components are mixed. characterized by the presence of a urethane linkage, and they can be easily synthesized through an addition reaction between alcohol and an isocyanate. com Headquarter: No. It provides several physical and chemical property combinations for demanding applications. characteristics and applications of casting rigid polyurethane foam formulation. The production of polyisocyanurate commences with a chemical reaction between polyols and isocyanates, resulting in the formation of urethane linkages. The phase separation degree of polyurethanes is influenced by the chemical interaction between blocks, hydrogen density in rigid and flexible segment, and chemical regularity of the chains [51,53]. Properties Of Urethane Formula Chemical name:Polyurethane ; CAS NO:9009-54-5; Molecular Formula:C 3 H 8 N 2 O; Molecular Weight:88. A wide range of applications of diverse types of PUs, including rigid, Chemical structures of the aromatic isocyanates toluene diisocyanate (TDI) and methylene diphenyl isocyanate (MDI). Polyurethane is an organic polymer with units joined by urethane (carbamate) links (–NH–(C = O)–O–). Oct 9, 2024 · The term Urethane is often used interchangeably with Ethyl carbamate, which is an ester of carbamic acid. Polyurethane chemical formula (429 products available) Previous slide Next slide. Sublimes readily at 217°F and 54 mm Hg. Polyurethane chemical formula (361 products available) Previous slide Next slide. In the structure of urethane the amino group is attached to the ethyl ester by the covalent bonds. While all of these substances are related by chemical compositions of nitrogen, hydrogen and oxygen molecules, they are distinct in their uses. More specialized polyolefins include polyisobutylene and polymethylpentene. Polyols are alcohols with at least two hydroxyl groups. Thermoplastic polyurethane (TPU) is any of a class of polyurethane plastics with many properties, including elasticity, transparency, and resistance to oil, grease, and abrasion. Find out how polyurethanes are produced from TDI and MDI, the main diisocyanates used in industry. May 29, 2024 · The molecular formula for urethane is C3H7NO2 (the 3, 7, and 2 should be subscripted). This allows students to develop alternative formulations to the ones given in the experimental procedure May 16, 2017 · These include chemical, abrasion, and scratch resistance, The preparation process for water-based polyurethane dispersion via the prepolymer mixing method. It is prepared by reacting polyols and di- or tri-isocyanates and has various applications in foams, coatings, adhesives, and elastomers. Urethane Formula is a colourless and odourless crystalline chemical that emits lethal nitrogen oxides. Therefore, its structure is given as, May 2, 2023 · Producing polyurethane requires a chemical reaction between polyol and diisocyanate. Isocyanate, designated in most instances by the letter "A”, is a highly reactive organic chemical containing one or more isocyanate (-N = C = O) groups, and is a basic Polyurethane Foams The formulations given below (in parts by weight) are three examples of typical formulations from the many available, which have been designed to meet specific requirements. Urethane or Ethyl carbamate presents itself as a colourless crystal or a white powder. Uses of Polyurethane slabs. Jan 8, 2024 · The chemical formula for polyurethane is quite flexible and can be used to create a wide range of products. Urethane is a compound that has an O-R group and an NH-R group bonded to the same carbonyl carbon. Chemical innovations to grow your business. When heat causes decomposition, this happens. Polyurethane is known for its durability, chemical resistance, and flexibility, making it suitable for use in various products such as foam insulation, adhesives Seals and gaskets: Polyurethane elastomers are employed for creating seals, gaskets, and O-rings due to their resilience, chemical resistance, and sealing properties. May 19, 2021 · Polyurethane is among the most important classes of industrial polymers with the fastest-growing global market. $2. Typically, these kinds of polyurethanes are made up of TDI or MDI backbones — which respectively offer good mechanical properties at high and low temperatures — combined with either Dec 9, 2022 · The polyurethane chemical formula is incredibly versatile; it lends itself to the creation of many different products. We are in this industry since more than three decades. POLYURETHANE information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook. We are a supreme source of speciality chemical and raw materials catering to API & bulk drugs, Lubricants, Flavours & Fragrance (Aromatic), Paints & Resin, Printing inks and Varnish, polyurethane industry, resins, speciality coatings and many more industries. Use:Used in aviation, railway, construction, sports and other aspects; Used for wooden furniture and metal surface finish; Used for storage tank, pipe, cold storage, beer, fermentation tank, fresh-keeping barrel insulation Insulation and cold preservation, building insulation and waterproof, can also be used for prefabricated polyurethane board; Can be used for Apr 4, 2023 · This structure of Urethane has the chemical formula /(NH_2COOC_2H_5/) and the molecular formula /(C_3H_7NO_2/). This creates small Urethane. Jun 4, 2024 · Urethane is a single chemical compound with the formula C₃H₇NO₂, consisting of amides, esters, and carbonic acid. When compared to thermoplastics, polyurethane is a more affordable material with excellent bonding, electrical insulation, high impact and abrasion resistance, and flexibility. Despite its name, it is not a component of polyurethanes. Glass Transition Temperature 10 to 180 °C Melting Temperature Polyurethane is a versatile polymer composed of organic units linked by urethane links. Dominant in a commercial sense are polyethylene and polypropylene. Theoretical calculations have also suggested that dielectric strength plays a minor role in urethane formation. Urea or carbamide is an organic compound with the chemical formula (NH 2) 2 CO. Because it is a carcinogen, it is rarely used, but naturally forms in low quantities in many types of fermented foods and drinks. Properties of Urethane. It is a chemical compound usually found for medical purposes to dissolve water-insoluble analgesics and break Download scientific diagram | Polyurethane chemical structure. SPRAY POLYURETHANE FOAM: THE COMPONENTS SPF is the product of two basic chemical ingredients: Isocyanate and resin blend. Dec 11, 2020 · Also covered are the means of minimizing some routes and maximizing others and the properties achieved in such control. Application of Polyurethane Chemical . Urethane Formula Structure. Polyurethane foam flexible formula, also known as flexible polyurethane foam, is a type of foam material that is characterized by its softness, flexibility, and resilience. In both cases, the foam is usually Chemical Structure and Formation. What is thermoplastic polyurethane (TPU)? 4 2. The chemical formula for a better tomorrow. Index 25 Table of contents 2 T80. Dependent on the starting materials, the end product differs in its nature, properties, and applications. g. In this article we will look at what polyurethane is, its main properties and applications. If you are willing to learn about the product’s features, you may continue reading. The strength of epoxy adhesives is degraded at temperatures above 350 °F (177 °C). These properties make polyurethane composites a versatile material, finding application in a wide array of fields. 1. What is Polyurethane Foam? “Polyurethane foam is a linear polymer composed of organic units joined by links of carbamate. TDI and MDI account for 90% of all isocyanate usage globally and are mostly used to produce flexible and rigid foams. Polyurethane was first discovered in 1937 by Otto Bayer and became available for commercial and industrial use in the 1950s. Download Table | Polyurethane flexible foam (PUF) formula from publication: Polyurethane flexible foam recycling via glycolysis using Zn/Sn/Al hydrotalcites as heterogeneous catalyst <div id="alert_box" class="popup_container full noScript"> <div class="popup_content"> <div class="flex-container"> <div class="text"> <span class="popupIcon icon Urethane is a kind of polymer that contains organic chains of carbamate. 7 Sprayed Polyurethane. Polyurethane is another synthetic resin-type varnish. But if we talk about the molecular formula of Urethane then it is: C 3 H 7 NO 2. It's crucial to note that Urethane is not a component of polyurethanes. The reaction and the general formula of polyurethane are given in Figure 1. It has a broad spectrum of biological activities and is a known multisite carcinogen capable of inducing tumours in various animal species. First developed in late 1930s, polyurethanes are some of the most versatile polymers. HH+ Sikafix: Polyurethane Chemical Grout. Characteristics: Lightweight: Urethane foam is lightweight, which makes it useful for applications where weight reduction is desired. Chemical resistance 18 7. In general, powder coatings Liquid deneef rockstab 1:2, grade standard: chemical grade; Gcp gelacryl polyurethane grouting chemical, for constructio Polyurethane galvanised puf sandwich panel, >150mm; Roof terrace waterproofing service, packaging size: 10kg; Elastomeric davco k10 polyurethane plus, grade standard: tec Liquid polyurethane foam chemical, grade Epoxy adhesives are better in heat and chemical resistance than other common adhesives. This formula represents the urethane linkage, the backbone of polyurethane. 6 Polyurethane. Firstly, urethane appears as odorless colorless crystals or white powder. Polyurethane elastomers are formed by the reaction of a polyol, a molecule with multiple hydroxyl (-OH) groups, and an isocyanate, which contains the -N=C=O functional group. TPU chemistry 6 3. Mar 1, 2021 · This polyurethane chemical formula might seem simple, but there’s a lot of room for complexity and variability. Uncoated foam “rusts” (forms a brown dusty layer). Learn about the structure, properties and uses of polyurethanes, a family of polymers made by reacting isocyanates and polyols. Roofing granules may be broadcast into the wet coating to improve weatherability. Polyurethane polymers are formed through step-growth polymerization. An example of formulation for reaction injection molding (RIM) and How Does Polyurethane Foam Work? The Chemical Reaction Explained. Applications of Polyurethane Composites. The basics of the reaction are the expansion and gel phase. Over the decades, there have been several publications relating the manufacturing and development of powder coatings as an alternative for liquid/solvent or water-based organic coatings. This usually results in these polyurethanes obtained from less hazardous Chemical Composition and Production In its fundamental form, the manufacture of thermoplastic polyurethane involves the polymerization of three components: a diisocyanate, a diol, and a chain extender. %PDF-1. PVC Polyvinyl Chloride - Chemical Resistance Chemical resistance of Polyvinyl Chloride PVC. 2. Its most important use is in the production of flexible polyurethane foams for furniture, bedding, carpet underlay, and automotive seating. Polyurethanes are linear polymers that have a molecular backbone containing carbamate groups (-NHCO2). Sep 27, 2023 · Ans. Learn about the chemical structure, types, production process, and applications of polyurethane, a versatile and durable synthetic resin. A polyolefin is a type of polymer with the general formula (CH 2 CHR) n where R is an alkyl group. Polyurethane has a range of physical and chemical properties, the following are the specific physical and chemical properties of polyuritane: Physical properties: Density diversity: Polyurethane can have different densities depending on its formulation, which means it does not have a fixed density and different types of polyurethane material Apr 9, 2024 · Name:Polyurethane,CAS:9009-54-5. The chemical linkage existing in the polymer is denoted as urethane (–NHCOO–) and is the most reactive moiety in the polyurethane. Jan 1, 2017 · Polyurethane differs from normal polymers in that there are no urethane monomers. Polyurethane is made of organic units, which are joined by urethane. The nature of the chemistry allows polyurethanes to be adapted to solve challenging problems, to be molded into unusual shapes and to enhance industrial and Dec 20, 2023 · Furthermore, urethane exposure can harm the central nervous system, and liver, and cause bone marrow suppression. "7. Polyurethane spray foam formula is a type of insulation material that is sprayed as a liquid and then expands and hardens into a solid foam. Its name is often shortened to PU or PUR. Properties. The urethane chemical formula is C3 H7 NO2. Diisocyanates are primarily used in the production of Aug 4, 2023 · Urethane is a term that refers to at least three different substances: ethyl carbamate, carbamate or polyurethane. However, a functionality of at least 2 is required in both the starting materials to prepare polyurethane. The correlation function is an interesting tool for analyzing the effect that the constituents of the TPU have on their degree of phase separation Pu Foam Formulation | Polyurethane Foam Formula | Pu फोम बनाने का देसी जुगाड़Pu Foam FormulationPu Foam FormulaPu Foam Making FormulaPolyurethane Foam Formul ChemSpider record containing structure, synonyms, properties, vendors and database links for urethane acrylate, UHESRSKEBRADOO-UHFFFAOYSA-N Jan 12, 2010 · Preparation of laboratory-scale polyurethane foams is described with formulations that are easy to implement in experiments for undergraduate students. The molecule has two amine groups (–NH 2) joined by a carbonyl functional group (C=O). Polyurethane, any of a class of synthetic resinous, fibrous, or elastomeric compounds belonging to the family of organic polymers made by the reaction of diisocyanates (organic compounds containing two functional groups of structure ―NCO) with other difunctional compounds such as glycols. 98. 6. Polyurethane foam is a versatile material that offers excellent insulation properties, lightweight construction, and a wide range of applications. If you are looking for a reliable and simple solution to your grouting needs, then our HH Sikafix Polyurethane Chemical Grout at Metro Sealant could be the perfect product for your project. 2% until 2027. Two-Component Polyurethane Systems: Innovative Processing Methods, Berlin, Boston PU 101: Polyurethane Chemistry Background of Polyurethane Technology • History of the development • Basic polyurethane chemistry overview • Review of typical definitions and terms • Thermoset vs thermoplastic Polyurethane Chemistry • Aromatic and aliphatic reaction chemistry • Monomeric and polyisocyanates Jul 31, 2020 · Powder coatings have gained a lot of attention since the 1960s and the 1970s (implementation of polyurethanes into the market) because of the environmental and ecological concerns. Jan 17, 2024 · Get In Touch. Particular attention is given to formulation aspects that are based on the main chemical reactions occurring in polyurethane production. com Welcome to Polyurethane Chemical Formulas, Inc. The global polyurethane market was valued at more than $65 billion and is expected to increase at a rate of 3. They are usually derived from a small set of simple olefins . Specificquality classifications 22 8. Production of Polyurethane Film Formula of Urethane. When these components are mixed together, a chemical reaction occurs, resulting in the formation of a foam with a cellular structure. Urethane is one of the main ingredients of surface sealants, adhesives, and coatings. TDI is an important chemical building block in a wide variety of polyurethane applications. It is a type of plastic that can be rigid or flexible, and it has a wide range of applications. Urethane is a human carcinogen in general. The carbon atoms in the chemical structure of urethane are implied to be located at the corner(s) and hydrogen atoms attached to carbon atoms are not indicated – each carbon atom is considered to be associated with enough hydrogen atoms to provide the carbon atom Polyurethane chemical formula (433 products available) Previous slide Next slide. However, PIR’s uniqueness lies in the introduction of catalysts that promote the formation of isocyanurate rings — more heat-resistant than urethane links. Polyurethane is flexible, has a high impact and abrasion resistance, strong bonding and electrical insulation properties, and is a relatively inexpensive material when compared to thermoplastics. Feb 3, 2023 · The Polyurethane Chemical Formula. In a polyurea, alternating monomer units of isocyanates and amines react with each other to form urea linkages. , lignins, tannins), or various compounds derived from agro-waste white biotechnology (Principle 7). Polymeric Mdi PMDI 200 CAS 9016-87-9 The absence of chemical interaction between the ash filler and the polyurethane matrix indicates that the ash acts as a filler with a plasticizing effect, enhancing the polymer chain mobility. Polyurethane is produced by the reaction of CO 2 and propylene oxide using zinc hexacyanocobaltate catalyst and a multi-functional alcohol as a Sep 6, 2020 · What is Urethane? Stated by urethane manufacturers, urethane by itself is a crystalline compound that is considered an ester of carbonic acid, which means it has been heated with alcohol with an acid catalyst. Structure of Urethane The chemical formula of Urethane is NH 2 COOC 2 H 5 while the molecular formula of Urethane is C 3 H 7 NO 2. The most common application of polyurethane is as solid foams, which requires the presence of a gas, or blowing agent, during the polymerization step. Medical applications: In the medical field, polyurethane elastomers are used for catheters, medical tubing, and prosthetic devices due to their biocompatibility and flexibility. Polyurethane chemical information summary. temperature. [48] Oct 7, 2021 · Polyurethanes are most often called “green” when they contain natural, renewable additives in their network or chemical structure, such as mono- and polysaccharides, oils (mainly vegetable oils), polyphenols (e. Ethyl carbamate occurs as a colourless crystal or white powder compound. In general, epoxy adhesives cured with heat will be more heat- and chemical-resistant than those cured at room temperature. Dec 7, 2021 · Polyurethane (PU) is a polymer having organic units joined by urethane (also known as carbamate). This is due to the ability to modify the starting chemicals for a range of polyurethanes with desired properties. 0932; Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file Polyurethane foam chemical formula (176 products available) Previous slide Next slide. This chemical does not meet GHS hazard criteria for 100% (54 of 54) of all Ethyl carbamate (also called urethane) is an organic compound with the formula CH 3 CH 2 OC(O)NH 2. The chemical reaction involves the exothermic condensation reaction of an isocyanate and hydroxyl-containing compound — usually a polyol. GSTPU polyurethane foam solution all service chemicals formula for making sofa Defonseka, Chris. During the initial reaction phase, a small amount of CO₂ gas is released and trapped in the liquid mixture. It is commonly used in various applications that require cushioning, comfort, and support. Apr 19, 2024 · Polyurethane is a unique polymer material widely used in various industries due to its versatility and multifunctionality. Urethane, also called ethyl carbamate is the ethyl ester of carbamic acid with the chemical formula C 3 H 7 NO 2. It is also known as ethyl carbamate and it is rarely used because it is carcinogenic. It is an ester of carbamic acid and a white solid. bnb wselx zvkocx wlkesqp gxqgl zmroep cdw usxsh ylpjtj uixzy