The contents of this page can freely be shared if cited as follows: For more information contact us at [email protected] or check out our status page at https://status.libretexts.org. ECHA maintains the C&L Inventory, but does not review or verify the accuracy of the information. Legal. 8.4: Condensed Structural and Line-Angle Formulas, [ "article:topic", "showtoc:no", "license:ccbyncsa", "transcluded:yes", "source[1]-chem-16066" ]. The molecular chemical formulas lack structural information. Release to the environment of this substance can occur from industrial use: manufacturing of the substance. ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment. Then, try SnaPeaks – simply upload your MS/MS data and SnaPeaks will provide what’s in your natural products. Substances for which classification and labelling data have been notified to ECHA by manufacturers or importers. Draw line-angle formulas given structural formulas. REACH registration dossiers have greater data requirements (such as supporting studies) than do notifications under CLP. The CLP Regulation uses the UN Global Harmonised System (GHS) and European Union Specific Hazard Statements (EUH). Harmonised classification and labelling is a legally binding classification and labelling for a substance, agreed at European Community level. Please hyperlink "Mol-Instincts" to www.molinstincts.com. The examples provided are generic examples and may not apply to the specific substance you are viewing. Substances indicated, in 2009, as being intended to be registered by at least one company in the EEA. For example, we can represent pentane (CH3CH2CH2CH2CH3) and isopentane [(CH3)2CHCH2CH3] as follows: Parentheses in condensed structural formulas indicate that the enclosed grouping of atoms is attached to the adjacent carbon atom. The EC Number is the numerical identifier for substances in the EC Inventory. In that case, the ATP (Adaptation to Technical Progress) number is displayed. Substances listed in the EINECS, ELINCS, or NLP inventories. A structural formula shows all the carbon and hydrogen atoms and the bonds attaching them. The CAS number is the substance numerical identifier assigned by the Chemical Abstracts Service, a division of the American Chemical Society, to substances registered in the CAS registry database. The full standard InChI of N-Ethylpropylamine is: InChI=1S/C5H13N/c1-3-5-6-4-2/h6H,3-5H2,1-2H3. A substance may have its use restricted to certain articles or products and therefore not all the examples may apply to the specific substance. 535 InfoCards are generated automatically based on the data available at the time of generation. The EC or list number is the primary substance identifier used by ECHA. The molecular weight of N-Ethylpropylamine is available in molecular weight page of N-Ethylpropylamine, which is calculated as the sum of the atomic weights of each constituent element multiplied by the number of atoms of that element specified in the chemical formula of N-Ethylpropylamine. The Support section provides tools and practical guidance to companies which have responsibilities under the EU chemicals legislation. A condensed structural formula is a more compact way of drawing the structural formula of a molecule. Tool showing an overview of substances in various key regulatory processes that authorities are working on. It covers their hazardous properties, classification and labelling, and information on how to use them safely. The CLP Regulation ensures that the hazards presented by chemicals are clearly communicated to workers and consumers in the European Union through classification and labelling of chemicals. Please note: Precautionary measures and guidance on safe use concern the use and handling of the specific substance as such, not of the presence of the substance in other articles or mixtures. Have questions or comments? The EC Number is the numerical identifier for substances in the EC Inventory. If generated, an InChI string will also be generated and made available for searching. Examples include recommended measures on fire-fighting, transport and recycling and disposal. A molecular formula shows only the kinds and numbers of atoms in a molecule. 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). Chemists often use condensed structural formulas to alleviate these problems. Please be aware there may be intermittent unavailability while work in ongoing. Upload a structure file or draw using a molecule editor. Some substance identifiers may have been claimed confidential, or may not have been provided, and therefore not be displayed. Thus, structural formulas identify the specific isomers by showing the order of attachment of the various atoms. For readability purpose, only non-confidential use descriptors occurring in more than 5% of total occurrences are displayed. When information is available in all sources, the first two are displayed as a priority. More information about CAS and the CAS registry can be found here. If available, additional information on classification and labelling (C&L) is derived from REACH registration dossiers submitted by industry. inside a watch) or with very low concentrations considered not to pose risks to human health or the environment. A condensed structural formula may also be referred to as a semi-structural formula. ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment. The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. A chemical formula of N-Ethylpropylamine can therefore be written as: The chemical formula of N-Ethylpropylamine shown above is based on the molecular formula indicating the numbers of each type of atom in a molecule without structural information, which is different from the empirical formula which provides the numerical proportions of atoms of each type. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739.