An oxygen atom normally forms two σ bonds with other atoms; the water molecule, H2O, is the... Get exclusive access to content from our 1768 First Edition with your subscription. Unlike simple alcohols, most phenols are completely deprotonated by sodium hydroxide (NaOH). Picric acid (2,4,6-trinitrophenol) is an important explosive that was used in World War I. The EC Inventory is a combination of three independent European lists of substances from the previous EU chemicals regulatory frameworks (EINECS, ELINCS and the NLP-list). To make more-complicated phenolic compounds, a more general synthesis is needed. The CLP Regulation uses the UN Global Harmonised System (GHS) and European Union Specific Hazard Statements (EUH). The Dow process is somewhat more general, but the stringent conditions required often lead to low yields, and they may destroy any other functional groups on the molecule. This stabilization is most effective for attack at the ortho or para position of the ring; therefore, the hydroxyl group of a phenol is considered to be activating (i.e., its presence causes the aromatic ring to be more reactive than benzene) and ortho- or para-directing. Substances for which classification and labelling data have been notified to ECHA by manufacturers or importers. Drugs.com provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. InfoCards are updated when new information is available. If a substance is classified under multiple CLH entries, a link to the C&L Inventory is provided to allow users to view CLH information associated with the substance and no text is automatically generated for the InfoCard. [provided by RefSeq, Oct 2008] The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. Individual Protection Measures, Such as Personal Protective Equipment ChemIDplus - 9003-35-4 - KXGFMDJXCMQABM-UHFFFAOYSA-N - Phenol-formaldehyde resin - Similar structures search, synonyms, formulas, resource links, and other chemical information. Information on applicable regulatory frameworks is also automatically generated and may not be complete or up to date. For example, the systematic name for thymol is 5-methyl-2-isopropylphenol. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Phenols are similar to alcohols but form stronger hydrogen bonds. Butylated hydroxytoluene (BHT) has a much lower toxicity and is a common antioxidant in foods. Other relevant information includes the following: To see the full list of notified classifications and to get more information on impurities and additives relevant to classification please consult the C&L Inventory. Chlorobenzene is hydrolyzed by a strong base at high temperatures to give a phenoxide salt, which is acidified to phenol. The examples provided are generic examples and may not apply to the specific substance you are viewing. The precautionary measures and guidance on safe use are as submitted to ECHA by registrants under the REACH Regulation. Abstract. Release to the environment of this substance can occur from industrial use: in the production of articles. Impurities or additives: When a specific critical property is calculated from industry data and where the majority of data submitters have indicated that the property relates to cases containing impurities and/or additives, then the respective critical property icon is modified with an asterisk (*). If at least one company has indicated that the substance classification is affected by impurities or additives, this will be indicated by an informative sentence. Many phenolic compounds were discovered and used long before chemists were able to determine their structures. This substance is used for the manufacture of: plastic products, mineral products (e.g. Formaldehyde, phenol polymer. Formaldehyde, polymer with (Chloromethyl) Oxirane and phenol. Substances which have been registered and can be placed on the EEA market by those companies with a valid registration. Formaldehyde is made of methanol and phenol from benzene using the cumene process. The source of the information is mentioned in the introductory sentence of the hazard statements. Therefore, trivial names (i.e., vanillin, salicylic acid, pyrocatechol, resorcinol, cresol, hydroquinone, and eugenol) are often used for the most common phenolic compounds. The described Product category (i.e. inside a watch) or with very low concentrations considered not to pose risks to human health or the environment. Phenol, formaldehyde polymer. In this study, three different boron compounds were used together with alkaline catalyst to synthesize phenol formaldehyde (PF) resole resins in situ. Guidance on safe use - recommendations by substance registrant on the proper use of the substance in various situations. Substances listed in the EINECS, ELINCS, or NLP inventories. Mixtures of phenols (especially the cresols) are used as components in wood preservatives such as creosote. In the presence of oxygen in the air, many phenols slowly oxidize to give dark mixtures containing quinones. EC Inventory, C&L Inventory, Substance Evaluation - CoRAP, Registration dossier, Pre-Registration process, Other, Substances of very high concern identification, Recommendation for the Authorisation List, Getting started with EU chemicals legislation, Classification of substances and mixtures, Harmonised classification and labelling (CLH). Chemical Formula C11h16o2 Phenol Formaldehyde Resin Market Price , Find Complete Details about Chemical Formula C11h16o2 Phenol Formaldehyde Resin Market Price,Phenol Formaldehyde Resin,Alkyl Phenolic Resin,Bakelite Phenolic Resin from Adhesives & Sealants Supplier or Manufacturer-Tianjin Top Global Co., Ltd. Commercial materials are most commonly based on phenol itself; other phenols such as cresols, xylenols and resorcinol are used to a limited extent. REACH registered substance data was upgraded on 9th November. For example, vanillin, the principal flavouring in vanilla, is isolated from vanilla beans, and methyl salicylate, which has a characteristic minty taste and odour, is isolated from wintergreen. Occupational exposure limit (OEL) values are derived within two legal frameworks that form an integral part of the EU’s mechanism for protecting the health of workers. Author of. Phenol formaldehyde; Structure of Bakelite. The ability of phenols to form strong hydrogen bonds also enhances their solubility in water. Hydrolysis of chlorobenzene (the Dow process), https://www.britannica.com/science/phenol, National Center for Biotechnology Information - PubChem - Phenol. Some substance identifiers may have been claimed confidential, or may not have been provided, and therefore not be displayed. Oxidation yields a hydroperoxide (cumene hydroperoxide), which undergoes acid-catalyzed rearrangement to phenol and acetone. This information is only displayed if the substance is well-defined, its identity is not claimed confidential and there is sufficient information available in ECHA’s databases for ECHA’s algorithms to generate a molecular structure. Phenols are widely used in household products and as intermediates for industrial synthesis. Public (risk management) activities co-ordination table. We report a facile in situ synthesis of reduced graphene oxide (RGO)–phenol formaldehyde (PF) composites with an interactive oxidation–reduction reaction. They are formed through the reaction of phenol with formaldehyde, followed by cross-linking of the polymeric chains. Although this process seems more complicated than the Dow process, it is advantageous because it produces two valuable industrial products: phenol and acetone. The common phenol hydroquinone is the component of photographic developer that reduces exposed silver bromide crystals to black metallic silver. If the hydroxyl group is the principal functional group of a phenol, the compound can be named as a substituted phenol, with carbon atom 1 bearing the hydroxyl group. Much of the chemistry of phenols is like that of alcohols. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. Hydroquinone (1,4-benzenediol) is a particularly easy compound to oxidize, because it has two hydroxyl groups in the proper relationship to give up hydrogen atoms to form a quinone. The simple alcohols are very weak acids (pK...…. Omissions? Hydrogen bonding results in higher melting points and much higher boiling points for phenols than for hydrocarbons with similar molecular weights. Typical mole ratios of formaldehyde to phenol range from 1.2 to 1.9 mol of formaldehyde per mol of phenol. The CLP Regulation makes sure that the hazards presented by chemicals are clearly communicated to workers and consumers in the European Union. The use information is displayed per substance life cycle stage (consumer use, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites or in manufacturing). Systematic names are more useful, however, because a systematic name specifies the actual structure of the compound. A substance may have its use restricted to certain articles or products and therefore not all the examples may apply to the specific substance. Corrections? Molecular Weight: 170.21. Dynea produces a large volume of formaldehyde as an intermediate product, but we also supply formaldehyde in various consentrations and quality grades to the external market. The ‘Properties of concern’ section shows ECHA-assigned graphical indicators for certain substance properties that are regarded as being of relevance or importance to human health and/or the environment based on the information provided to the Agency. REACH regulation aims to improve the protection of human health and the environment from the risks that can be posed by chemicals. This information has not been reviewed or verified by ECHA, and may change without prior notice. Nhận dạng; Số CAS: Trừ khi có ghi chú khác, dữ liệu được cung cấp cho các vật liệu trong trạng thái tiêu chuẩn của chúng (ở 25 °C [77 °F], 100 kPa). Compounds with other principal functional groups can be named with the hydroxyl group as a hydroxy substituent. Lignin is a good candidate to replace phenol in the phenol formaldehyde resins’ formulation because (a) its polyphenolic structure is similar to that of phenolic resin (Fig. Phenoxide ions, generated by treating a phenol with sodium hydroxide, are so strongly activated that they undergo electrophilic aromatic substitution even with very weak electrophiles such as carbon dioxide (CO2). Phenol dissolves to give a 9.3 percent solution in water, compared with a 3.6 percent solution for cyclohexanol in water. Nitro groups are strongly deactivating (i.e., make the aromatic ring less reactive), however, and it is often difficult to add a second or third nitro group to an aromatic compound. The chemical equation is given below. The Prior Informed Consent Regulation administers the import and export of certain hazardous chemicals and places obligations on companies who wish to export these chemicals to non-EU countries. For example, phenols react with acids to give esters, and phenoxide ions (ArO−) can be good nucleophiles in Williamson ether synthesis. This section provides links to the list of precautions (precautionary statements) and to the guidance on safe use, if they have been provided in REACH registration dossiers. The most obvious difference is the enhanced acidity of phenols. Here you can find all of the regulations and regulatory lists in which this substance appears, according to the data available to ECHA. Phenol-formaldehyde resins were the first … Phenol-formaldehyde resins are heat-resistant and … Under the trade name Bakelite, a phenol-formaldehyde resin was one of the earliest plastics, invented by American industrial chemist Leo Baekeland and patented in 1909. Let us know if you have suggestions to improve this article (requires login). Many of the more complex phenols used as flavourings and aromas are obtained from essential oils of plants. ECHA has no public registered data indicating whether or into which articles the substance might have been processed. A substance identified primarily by an EC or list number may be linked with more than one CAS number, or with CAS numbers that have been deleted. The structure of phenol. Phenol itself is the only one of the family that you are likely to need to know about for UK A level purposes. The date of the last update corresponds to the publication date of the InfoCard and not necessarily to the date in which the update occurred in the source data. Properties of concern are calculated at four "levels" of certainty: The following properties of concern are calculated: The substance properties displayed in this section are derived from Harmonised classification and labelling (CLH) data, entries in the Candidate list of substances of very high concern for authorisation, the PBT assessment list, the ED assessment list, REACH registered dossier data and from notifications made under CLP. Professor of Chemistry, Whitman College, Walla Walla, Washington. Linear Formula: C 6 H 5 C 6 H 4 OH. With phenol used in this manner, the mortality rate from surgical amputations fell from 45 to 15 percent in Lister’s ward. ECHA has no public registered data indicating whether or in which chemical products the substance might be used. CAS Number: 92-69-3 Information on precautionary measures and the safe use is submitted by the registrant of a substance and the registrant is solely responsible for its accuracy and completeness. 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