Phenolphthalein Pure pH range 8.3-10 100g. Phenolphthalein is used as a general pH indicator. Weight Average: 318.3228 Monoisotopic: 318.089208936 Chemical Formula C 20 H 14 O 4 Synonyms. 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). Phenolphthalein Accession Number DB04824 Description. Litmus is not used in titrations because the pH range over which it changes colour is too great. If available, additional information on classification and labelling (C&L) is derived from REACH registration dossiers submitted by industry. £104.03. Il s'agit donc d'un sel de disodium. A reading of 7 indicates a neutral pH like pure water. This substance is used in the following products: pH regulators and water treatment products, laboratory chemicals, pharmaceuticals, textile treatment products and dyes and washing & cleaning products. Click to see full answer. This substance is used in the following areas: health services and scientific research and development. The pH value changes from 6.5 to 10. The CLP Regulation uses the UN Global Harmonised System (GHS) and European Union Specific Hazard Statements (EUH). In such cases, it is used to empty the bowels. Chemists use pH indicators in a common laboratory procedure called titration. In chemistry it is used as a pH indicator, which in acidic solutions remains colorless, but in the presence of bases it turns red currant. acetic acid with sodium hydroxide 45 views Sponsored by Raging Bull, LLC the electronic edition of the Official Journal of the European Union should be consulted. Deux autres zones de virage peu connues et très peu utilisées peuvent caractériser la phénolphtaléine. VAT. Hazard statements were adapted to improve readability and may not correspond textually to the hazard statements codes description in the European Union Specific Hazard Statements (EUH) or the, Substance of very high concern (SVHC) and included in the. The examples provided are generic examples and may not apply to the specific substance you are viewing. 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. The information is aggregated from the data coming from REACH substance registrations provided by industry. Each pH indicator is defined by a useful pH range. Skip to the beginning of the images gallery . La phénolphtaléine ou 3,3-bis(4-hydroxyphényl)-1-(3H)-monobenzofuranone (le symbole φφ (phi-phi) ou la notation générale HIn, commune à d'autres indicateurs, sont utilisés) est un composé organique de formule brute C20H14O4. The ‘Hazard classification’ and labelling section uses the signal word, pictogram(s) and hazard statements of the substance under the harmonised classification and labelling (CLH) as its primary source of information. pH range of phenolphthalein is 8.3 - 10.0? Phenolphthalein works somewhat differently as it is naturally colorless but turns pink in alkaline solutions. Phenolphthalein changes colour at approximately pH 8.2. (NTP, 1992) 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). Derivative Type: Yellow Phenolphthalein . machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use. It is known as the titrant. Superimposed on it are the pH ranges for methyl orange and phenolphthalein. Phenolphthalein is a weak acid. pH indicators generally change color over a range of two pH units. Below this pH, it is colorless; above, it is blue. Phenolphthalein is a chemical compound with the formula C 20 H 14 O 4 and is often written as "HIn" or "phph" in shorthand notation.Phenolphthalein is often used as an indicator in acid–base titrations.For this application, it turns colorless in acidic solutions and pink in basic solutions. This substance has an industrial use resulting in manufacture of another substance (use of intermediates). Liquid pH indicators are used to test other solutions. In these cases, Infocards may not identify all substances in the group.Therefore it does not represent official and legally–binding information. What is the Classification and Labelling Inventory? A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphthalein is pink over the range of pH 8 – 12. Originally Answered: What is the pH range of a phenolphthalein indicator? What is Phenolphthalein? £86.69 excl. solution is specified. Phenolphthalein 's uses include the Kastle-Meyer test for blood where the presence of hemoglobin causes the indicator solution to turn pink. thymolphthalein. disodium tetraborate EC no. Indicator Range At a low pH, a weak acid indicator is almost entirely in the HIn form, the … PHYSICAL DESCRIPTION: White or yellowish-white to pale orange fine crystalline powder. How does Phenolphthalein Indicator Work? 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. b = 14,819 Å The Support section provides tools and practical guidance to companies which have responsibilities under the EU chemicals legislation. Specifications pH range (colourless to violet-red) .....8,2 - 9,8 Packaging 100 ml 250 ml 1 l FE0496G100 It is an organic molecule with neutral pH. If the substance was not covered by the EC Inventory, ECHA attributes a list number in the same format, starting with the numbers 6, 7, 8 or 9. Buy Indigo™ phenolphthalein test papers for fast, inexpensive ammonia gas leak detection. The way in which both the color of phenolphthalein and the fraction present as the conjugate base varies with the pH is shown in detail in Figure \(\PageIndex{1}\). The quantity of indicator in aqueous (aq.) The ‘Substance identity’ section is calculated from substance identification information from all ECHA databases. Composition: Phenolphthalein 100% CAS Number: 77-09-8 Density: 1.3 Chemical Formula: C20H14O4 Molecular Weight: 318.32 g/mol Melting Point: 258 to 262°C Color: White to pale yellow powder Physical State: Solid pH Range: 8.0 (colorless) - 10.0 (pink) Solubility Information: 0.4 g/L… Phenolphthalein is used as a general pH indicator. Par exemple, dans un milieu contenant de l'hydroxyde de sodium NaOH, la charge de la forme basique est compensée par deux ions Na+. Its transition range is around pH 9.3–10.5. JohnBurgess , Colin D.Hubbard , in Advances in Inorganic Chemistry, 2013. Only $2.95 for 100 strips. However it reacts with alkali to form a salt, and this has a pink colour. The phenolphthalein is an organic dye, which is in turn a weak diprotic acid, used in many volumetric determinations as an acid-base indicator. Some substance identifiers may have been claimed confidential, or may not have been provided, and therefore not be displayed. Phenolphthalein: pH 8.2 colourless, pH 9 pink, pH 10 red (with excess alkali colourless again) Universal Indicator: pH 1, 2, 3 red, pH 4 pink, pH 5 orange, pH 6 yellow, pH 7 green, pH 8 green-blue ... Estimate the range of pH tested by the plant extract indicators. 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. Phenolphthalein Pure pH range 8.3-10 100g. Phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. Phenolphthalein of pH range 8 ... and sodium hydroxide (a strong base) is pictured. Dans le cas de la phénolphtaléine, la forme acide présente une structure aromatique (présence de 3 cycles benzéniques) alors que la forme basique est de type quinoïdique. For example phenolphthalein changes from colorless at 8.2 to pink at 10. inside a watch) or with very low concentrations considered not to pose risks to human health or the environment. β = 90,00 ° R68 : Possibilité d'effets irréversibles. Registration, Evaluation, Authorisation and Restriction of Chemicals, Chemical Agents Directive and Carcinogens or Mutagens Directive, 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). Assume the equilibrium is firmly to one side, but now you add something to start to shift it. Phenolphthalein is a crystalline solid which is almost insoluble in water, so is supplied as a solution in ethanol. 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. The precautionary measures and guidance on safe use are as submitted to ECHA by registrants under the REACH Regulation. Phenolphthalein, solution 1% in ethanol, indicator Technical Data Sheet Identification C20H14O4 M = 318,33 g/mol CAS [77-09-8] EC number: 201-004-7 Taric code: 3822 00 00 Applications analytical chemistry, laboratory reagent, indicator. Phenolphthalein. You can see that neither indicator changes colour at the equivalence point. Molecular Weight 318.32 . Information on applicable regulatory frameworks is also automatically generated and may not be complete or up to date. The EC Number is the numerical identifier for substances in the EC Inventory. 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