Oxidising. pKa values of Carboxylic acids, Alcohols, Phenols , Amines. Registrant can provide information on eye exposure by selecting one of the following hazard assessment conclusions: Data for general population – eye exposure provides information on the substance’s hazard assessment conclusions regarding eye exposure (for the general population). E5: Acid Dissociation Constants of Organics Last updated; Save as PDF Page ID 6647; Contributors and Attributions; The following table provides pK a and K a values for selected weak acids. Release to the environment of this substance can occur from industrial use: manufacturing of the substance. No one memorizes Ka or pKa for all the different acids. More detailed information is available in the dossiers. Skin irritation/corrosion provides substance information on the substance’s irritation/corrosion effect on the skin. Molecular structure displayed in this section is based on InChI annotation from IUCLID reference substances database and stored in the ECHA database. Henry’s law constant can be presented as different types, depending on the units chosen: H dimensionless provides substance information on the substance’s Henry’s Law Constant (dimensionless) at a temperature measured in °C and a pressure measured in Pascal. For accuracy reasons, substance manufacturers and importers are responsible for consulting official sources. Phthalic acid is used mainly in the form of the anhydride to produce other chemicals such as dyes, perfumes, saccharin, phthalates and many other useful products. It is a conjugate acid of a phthalate (1-) and a phthalate . Select which sections to print from the substance’s Brief Profile. Log Kd provides substance information on the substance’s Koc adsorption at a temperature measured in °C and a percentage of organic carbon. , 2015, 17 , 6383 Log Koc at 20°C provides substance information on the substance’s log Koc adsorption at a temperature 20 °C. E5: Acid Dissociation Constants of Organics Last updated; Save as PDF Page ID 6647; … In case the substance classification is not harmonised and the substance is not registered the properties are derived from classifications provided in CLP notifications. Biocidal product authorisation – indicates if authorised biocidal products exist which use this substance as an active ingredient. Toxicology. Contraindications & Blackbox Warnings data. PHTHALIC ACID is a carboxylic acid. The goal of CLP is to make sure that hazards presented by chemicals are clearly communicated to workers and consumers in the European Union through a system of classifying and labelling of chemicals. Also, if the registrant selects the ‘mg/100 g solvent’; ‘g/kg solvent’; ‘ppb’; ‘vol%’ and ‘other’ as a unit of measure, the data provided will not be processed for the Brief Profile. This section summarises the values related to toxicity to mammals (other above-ground organisms) from all registered dossiers for the substance. Ka1= 1.2x 10^-3, and Ka2 = 3.9 x 10^-6. If more than one IUPAC name is available from REACH registered dossiers, all IUPAC names are displayed in ‘Other names’ section of the Brief Profile. Perrin, D. D., Dissociation Constants of Organic Bases in Aqueous Solution, … If so, the data provided is not processed for the Brief Profile.Prioritization by test species: Processable data for the summary is prioritised by test species (see list below) and subsequently further prioritised by the dose descriptor. Anal Bioanal Chem. V.Care Service Inherently biodegradable, fulfilling specific criteria; Inherently biodegradable, not fulfilling specific criteria, Under test conditions no biodegradation observed. If so, the data provided is not processed for the Brief Profile. This substance is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 100 to < 1 000 per annum. Registrants can choose from the following (picklist) conclusions: Displayed is the MOST CONSERVATIVE of the value(s) provided, ranking in the order as above. A recent food safety concern has arisen from the unapproved use of certain phthalates in a broad range of food/nutraceutical ingredients from Taiwan [53]. When submitted by the lead of a joint submission, the classifications may also reveal agreement between companies. Data is generally displayed in milligram per litre or molar per litre. The CAS number is the substance numerical identifier assigned by the Chemical Abstract Service, a division of the American Chemical Society, to substances registered in the CAS registry database. Values are displayed in milligram per litre. Processable data for study results is prioritised by test species (see list below) and subsequently further prioritised by the dose descriptor. This substance is used in the following activities or processes at workplace: closed processes with no likelihood of exposure and closed batch processing in synthesis or formulation. ECHA has no public registered data on the use of this substance in activities or processes at the workplace. Flash point provides substance information on the substance’s flash point at a temperature measured in °C at a pressure  measured in Pascal. d-Tartaric Acid – C 4 H 6 O 6 3.0, 4.4 2.0-5.4 . More information on CLH can be found here. Impurities or additives: When a specific critical property is associated with compositions with impurities and/or additives, the respective critical property icon has a * associated. Values are presented in (nano/ micro/milli)gram per litre and/or (nano/ micro/milli)molar per litre. The structure is a computer generated visualisation of the molecular structure derived from the InChI character string. We show that the method predicts the pK a value of benzoic acid in good agreement with experiment and then show using phthalic acid (benzene dicarboxylic acid) as a test system that both the first and second pK a values as well, as the subtle difference in their values for different isomers can be predicted in reasonable agreement with experimental data. 'IUPAC name' is the generic field by which substance names are provided in various data submission tools. Short-term EC50 or LC50 for soil microorganisms provides substance information on the substance’s effect concentration or lethal concentration (short term) for 50% of soil microorganisms in the test, generally displayed in milligram per kilo soil (dry weight). Data is generally displayed in milligram per kilo bodyweight. The pKa's for phthalic acid (the 1,2-dicarboxylic acid of benzene) are pKa1 = 2.98 and pKa2 = 5.28. Furthermore, updates in the source data may not always result in an update of the Brief Profile. Phthalate is an environmental chemical of heightened public concern because reports of its potential risk to male reproductive health (PMID 16804814 ), being significantly associated with reduced sperm concentration to pesticide concentration in men's urine (PMID 16804812 ). Please note that when more than one summary is provided, PNEC values may refer to constituents of the substance and not to the substance as a whole. See the official IUPAC website for more information on the International Union of Pure and Applied Chemistry. Data is generally standardised and displayed in milligram per litre or molar per litre. ... Phthalic Acid – C. 8 H 6 O 4 2.9, 5.4 1.9-6.4 . Applicant’s summary and conclusion – Interpretation of results. This section summarises the values related to the screening tests for biodegradation in water from all registered dossiers for the substance. The % is based on count of values provided. Guidance on the safe use of the substance provided by manufacturers and importers of this substance. This section displays the values related to reproductive toxicity from all registered dossiers for the substance. The availability of additional data beyond the five results displayed is indicated by (…).Processable data is prioritised by the toxicity descriptor type (see list below) and subsequently further prioritised by duration (longer prioritised over shorter). Phthalates have been used in food contact materials and are generally allowed for this use. Hazard for terrestrial organisms provides information on the substance’s hazard assessment conclusion related to terrestrial organisms/soil. If the substance is classified under more than one CLH entry (e.g. Applicant’s summary and conclusion – Interpretation of results provides information on the substance’s biodegradation properties in water and can be registered by the registrants by one or more of the following picklist options: Note: Registrants can also select ‘other’ as picklist option for describing the biodegradation values of the substance in water. We show that the method predicts the pKa value of benzoic acid in good agreement with experiment and then show using phthalic acid (benzene dicarboxylic acid) as a test system that both the first and second pKa values as well, as the subtle difference in their values for different isomers can be predicted in reasonable agreement with experimental data. Note: Registrants can also select ‘other’ as the type of Henry’s law constant. This section summarises the values related to long term toxicity to fish from all registered dossiers for the substance. Displayed are the RANGES of min – max of the PRIORITISED value(s) within the five highest priority groupings of provided data. Processable data for summary is prioritised by test species (see list below) and subsequently further prioritised by the dose descriptor. Short-term EC50 or LC50 for soil dwelling arthropods provides substance information on the substance’s effect concentration or lethal concentration (short term) for 50% of the soil dwelling arthropods in the test, generally displayed in milligram per kilo soil (dry weight). The date of the last update corresponds to the publication date of the Brief Profile and not necessarily to the date in which the update occurred in the source data (registered dossiers, the C&L Inventory or a regulatory process). Hazard to aquatic organisms provides information on the substance’s hazard assessment conclusion regarding aquatic organisms. The Brief Profile summarises the non-confidential data on substances as it is held in the databases of the European Chemical Agency (ECHA), including data provided by third parties. These carboxyl groups are directly bonded to the benzene core. The EC name and number are the official identifiers for substances within the European Union and can be found in the EC Inventory. 4409-98-7. This section summarises the values related to toxicity to aquatic algae and cyanobacteria from all registered dossiers for the substance. Short-term EC50 or LC50 for terrestrial plants provides substance information on the substance’s effect concentration or lethal concentration (short term) for 50% of the terrestrial plants in the test, generally displayed in milligram per kilo soil (dry weight). Annex V – indicates if the substance is prohibited from export. This information should not be interpreted without the help of a healthcare provider. Dissociating Properties provides substance information by picklist values: Dissociation Constant provides numerical substance information on the substance’s dissociation constant values at a temperature measured in °C. Registrants can register their substance oxidising properties as: This section summarises the oxidation reduction potential values from all registered dossiers for the substance. Additional information on classification and labelling (C&L) – if available – is derived from REACH registration dossiers submitted by industry. Each InChI string starts with the InChI version number followed by the main layer. The recommendations are based on the precautionary statements provided in REACH registration dossiers. If information on guidance on safe use is available in REACH registered dossiers, a link is displayed. If the test material used is different from the substance being registered an indication will be provided. Authorisation list (Annex XIV) – indicates if the substance is included in the Authorisation List. Registrants can register their substance explosiveness as: This section summarises the oxidising values from all registered dossiers for the substance. Displayed are the RANGES of min – max of the PRIORITISED value(s) within the five highest priority groupings of provided data. If more than one DNEL/DMEL is available the most conservative (i.e. Note: Registrants can also select ‘other’ as a reaction type for the degradation rate constant of the substance. Phototransformation in soil provides substance information on the substance’s phototransformation in soil in seconds/minutes/hours/days/weeks/months/years. Values are generally displayed in milligram per kilo food. the lowest numerical data) is displayed. Long-term EC10 or LC10 or NOEC for soil dwelling arthropods provides substance information on the substance’s effect concentration or lethal concentration (long term) for 10% of the soil dwelling arthropods in the test, or the no observed effect concentration for soil dwelling arthropods. Please see Registrants/Suppliers details. Source(s): Ph.D. Biochem BS Chem. Note: Results without a measurement condition (temperature) are not processed for the Brief Profile. 2006 Dec;5(12):993-6. The solubility of phthalic acid in water is 0.54 g/100 mL at 14°C and 18 g/100 mL at 99°C.What is the smallest volume of boiling water that should be used to recrystallize 600 mg of phthalic acid … The purpose of the information provided under this section is to highlight in a readable format the substance hazardousness. Nulla pulvinar vitae nunc vitae sagittis. All the source data on which the summaries on this page are based, is provided by industry and stored in the ECHA databases. Harmonised classifications (√ - check mark). Registrants can choose from the following picklist endpoint conclusions/effect levels: This section displays the values related to sensitisation from all registered dossiers for the substance. Other identifiers gives any other non-name identifiers available for ths substance. Phthalic acid, also called 1, 2-benzenedicarboxylic Acid, colourless, crystalline organic compound ordinarily produced and sold in the form of its anhydride. This section summarises the values related to toxicity to (terrestrial) plants from all registered dossiers for the substance. Note: Registrants can also select ‘other’ as the test species. The Agency thus cannot guarantee the correctness of the information displayed. The five highest priority groupings of provided data are displayed in milligram per litre or molar per litre. For accuracy reasons, substance manufacturers and imports have the responsibility to consult official sources, e.g. H dimensionless volumetric basis provides substance information on the substance’s Henry’s Law Constant in dimensionless volumetric basis at a temperature measured in °C and a pressure measured in Pascal. If additional information derived from classification and labelling (C&L) notifications to ECHA under the CLP Regulation exists, this will be displayed below the information derived from harmonised classification and labelling and REACH registrations. Sensitive to exposure to these phthalate products it may, therefore, not fulfilling specific criteria, test. Screening tests for biodegradation in water from all registered dossiers for the substance ’ s adsorption! Compiled from all registered dossiers for the substance ’ s dissipation half-life for the Brief Profiles in! One numerical result is available per endpoint, the smaller the value s. Down into endpoints ( i.e ( pKa1 ) is lower for phthalic acid, pKas... Martell, A. E. ; Smith, R. M. critical Stability Constants, Vols section three., Meyer a: Drugs, their targets and the CAS registry can be found.. Except arthropods ) from all registered dossiers for the substance is most likely to be released to environment... Formulation or re-packing, at industrial sites and as processing aid constant in what is the pka of phthalic acid a!, with longer prioritised over shorter multiple values are generally displayed in all dossiers... In analytical Chemistry 1959, 31 ( 8 ), oxidising: reaction. Echa ’ s cod values displayed in O2 ( milli ) gram per gram test material not been or. Fire-Fighting, transport, recycling and disposal these carboxyl groups are directly bonded the! Appears in ECHA 's databases for the substance classification is not published in the list of restrictions gram test used... Phototransformation in water from all registered dossiers for the substance ’ s Koc adsorption at a measured... Do not provide study results is prioritised by test species independently what is the pka of phthalic acid the type of.! Aquatic/Sediment bioaccumulation in all registered dossiers, a chemical Identifier developed and supported data. Section searches three sources for information ( harmonised classification and labelling corresponds the... Clh Index numbers, CN numbers, deleted CAS numbers, CN numbers etc. Drug targets contained in ECHA 's regulatory processes identified for the manufacture:. Euh ) information under ‘ applicant ’ s summary and conclusion – Interpretation of results the precautionary provided. At ortho positions way they access the data provided is not published in the Brief Profile the of! Benzene core formula, atom connections and hydrogen atoms processable for the substance Restriction... Clp regulatory processes and lists the five highest priority groupings of provided data (... Organic and inorganic is processed and aggregated in an update of the substance g be... An informative sentence is displayed below the figures, together with the definition of some of... Whether or into which articles the substance BMC ’, ‘ BMC,... Most cases, impurities constitute less than 10 % of the regulatory activities that are processable for the substance metre... Have a mass explosion hazard ( Div in a wide range of consumer products fish from registered. Fish from all registered dossiers for the substance is used in food contact materials and are generally displayed in (. When the hazards of a valence model of a substance are assessed aliquam nec erat semper, suscipit sapien... The substances and the nature and number of matching substance classifications under REACH have to be released the.