Processable data is prioritised by the toxicity descriptor type (see list below) and subsequently further prioritised by duration (in hours, longer prioritised over shorter).

The Index number for each substance is in the form of a digit sequence of the type ABC-RST-VW-Y. The α-carbon is directly attached to the aldehyde group, β-carbon is attached to the carbon adjacent to the aldehyde group and so on.

The Agency thus cannot guarantee the correctness of the information displayed.

If more than one result is available per endpoint, the range of results (min-max) and range of experimental conditions will be presented (RANGE method). Data is generally displayed in milligrams per litre.

Data is generally displayed in milligrams per kilogram in the case of soil (dry/wet weight), or gram per hectare.

Molecular structure displayed in this section is based on InChI annotation from IUCLID reference substances database and stored in the ECHA database. Inherently biodegradable, fulfilling specific criteria; Inherently biodegradable, not fulfilling specific criteria, Under test conditions no biodegradation observed.
Since the source data can be updated at any time while the Brief Profiles are updated at intervals, a slight delay in the publication of information may occur.

Remove contact lenses if present and easy to do – continue rinsing.

The CLP regulatory processes identified for the Brief Profile are: The BPR (528/2012) entered into force on 1 September 2013.
This section displays the values related to reproductive toxicity from all registered dossiers for the substance.

Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)The REACH Regulation (1907/2006) entered into force on 1 June 2007.

The IUPAC name of CH 3 COOH is ethanoic acid, so the IUPAC name of (CH 3 CO) 2 O is ethanoic anhydride. See ‘Data for workers – Inhalation exposure’, with the following additional hazard assessment conclusion in the case of short term: The registered threshold is generally displayed in milligrams per kilogram per bodyweight per day. Note: If the measurement condition (percentage of organic carbon) is not provided by the registrant for adsorption coefficient Kd, the data provided is not processed for the Brief Profile. This section summarises the values related to phototransformation in soil from all registered dossiers for the substance. Processable data for study results is prioritised by test species (see list below) and subsequently further prioritised by the dose descriptor.

The quality and correctness of the information remains the responsibility of the data submitter. 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. The number of studies provided is indicated by ‘[x] studies submitted’, while the actual number of studies processed for the endpoint is indicated by ‘[x] studies processed’. Bioaccumulation factor (aquatic species) provides substance information on the substance’s bioaccumulative properties not taking account the dimensions.

For example, substance impurities can constitute a valid reason for a different classification of the substance.

Please see the registered dossiers for substance information for the following endpoints: The ’Substance identity’ section links substance identification information from all databases that are maintained by ECHA. The availability of additional data beyond the five results displayed is indicated by (…) icon.

Critical property indentification: Where less than 90% of the notifiers provide the same classification to derive the critical property, the border of this critical property icon is displayed as dashed. No automatically processable data submitted.

This section summarises physical and chemical property values from all registered dossiers in ECHA’s databases for the substance. ECHA has no public registered data indicating whether or in which chemical products the substance might be used. Carboxylic ester group If a given compound contains carboxylic ester group (-COOR) therefore it is carboxylic ester then its IUPAC name is written on the basis of the IUPAC name of the corresponding acid. RST is the consecutive number of the substance in the series ABC.

Processable data for study results is prioritised by dose descriptor type (see list below) and subsequently further prioritised by the test species. The dark blue bar illustrates the percentage of matching substance classifications provided by manufacturers and importers in a REACH registration dossier. The information provided in the free-text fields is not published in the Brief Profiles. The BPR addresses the placing on the market and use of biocidal products, which are used to protect humans, animals, materials or articles against harmful organisms, like pests or bacteria, by regulating the active substances contained in a biocidal product. This section summarises the values related to short–term toxicity to fish from all registered dossiers for the substance. See ‘Summary effect on fertility oral route’, except: This section displays the values related to neurotoxicity from all registered dossiers for the substance. This Brief Profile is covered by the ECHA Legal Disclaimer. ABC corresponds to the atomic number of the most characteristic element or the most characteristic organic group in the molecule. The latter 1,3-dipole undergoes 1,3-dipolar cycloaddition to alkenes giving 2-isoxazolines in a one-pot procedure.

More information on CLH can be found here. This main layer contains sublayers for the chemical formula, atom connections and hydrogen atoms.

EPA Registry Name: Acetaldehyde. If in eyes: rinse cautiously with water for several minutes. Close Find out more on how we use cookies.

Koc at 20°C provides substance information on the substance’s Koc adsorption at a temperature 20 °C. Phenylacetaldehyde is an aldehyde that consists of acetaldehyde bearing a methyl substituent; the parent member of the phenylacetaldehyde class of compounds.

A substance may have more than one CAS number associated.

Values are generally displayed in milligrams per kilogram (dry weight). This section provides an overview of the type of study records behind the presented results and – if applicable - data-waving justifications. Heating of acetaldoxime in xylene in the presence of 0.2 mol % nickel(II) acetate[1] or silica gel[8] as catalyst caused isomerization into acetamide.

The Candidate List includes substances that are subject to additional protocols and reporting obligations and which may eventually be included in the Authorisation list, further limiting their use. This section provides physicochemical information compiled from all automatically processable data from REACH registration dossiers that is available to ECHA at the time of generation. Units and data are normalised when possible and therefore the unit of measure/order of magnitude in the Brief Profile data may not correspond exactly to the one in the registered dossier. LC50 for marine water algae provides substance information on the substance’s lethal concentration for 50% of the marine water algae in the test, generally displayed in milligram per litre.

Short–term toxicity to aquatic invertebrates, Long–term toxicity to aquatic invertebrates, Toxicity to aquatic algae and cyanobacteria, Toxicity to aquatic plants other than algae, Endocrine disruptor testing in aquatic vertebrates - in vivo, Toxicity to terrestrial macroorganisms except arthropods. -128 °C Alfa Aesar-124 °C OU Chemical Safety Data (No longer updated) More details-190 F (-123.3333 °C) NIOSH AB1925000-125 °C Jean-Claude Bradley Open Melting Point Dataset 13101-124 °C Jean-Claude Bradley Open Melting Point Dataset 15565-123.37 °C Jean-Claude Bradley Open Melting Point Dataset 22506-128 °C Jean-Claude Bradley Open Melting Point Dataset 6308 The ‘total tonnage’ band published does not necessarily reflect the registered tonnage band(s). 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. This section summarises the values related to short term toxicity to aquatic invertebrates from all registered dossiers for the substance. This section summarises the boiling point values from all registered dossiers for the substance. Values are generally displayed in milligram per litre. No or insufficient data available at present, Hazard related to composition of atmosphere identified, No potential to cause toxic effects if accumulated (in higher organisms) via the food chain, bw/day (mg/kg bw/day; mg/kg bw/day; mg/kg bw/day), DMEL (Derived Minimum Effect Level) - not included for short–term effects, Insufficient data available (further information necessary), Hazard unknown (no further information necessary), Hazard unknown but no further hazard information necessary as no exposure expected, ‘No DNEL required: short term exposure controlled by conditions for long-term’ is added, Hamster (combine hamster, Armenian; hamster, Chinese and hamster, Syrian), No adverse effect observed (not irritating), Adverse effect observed (irreversible damage), mg/kg bw/day (nominal/actual dose received), See ‘Study results oral: Prioritization by test species’, mg/L air (combining mg/L air, mg/L air (nominal), mg/L air (analytical), mg/m³ air, mg/m³ air (nominal), mg/m³ air (analytical)), ppm (combine ppm, ppm (nominal), ppm (analytical), mg/kg bw/day (actual dose received), mg/kg bw/day (combining mg/kg bw/day (nominal), mg/kg bw/day (actual dose received) and mg/kg bw/day), mg/cm² per day (combining mg/cm² per day, mg/cm² per day (nominal), mg/cm² per day (analytical)), No study available / no study available (further information necessary). Additionally, if available, information on the use of the substance and how consumers and workers are likely to be exposed to it can also be displayed here.

Molecular Weight: 44.05 Molecular Formula: C2H4O Additional Metadata. 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. Note: Registrants can also select ‘other’ as a reaction type for the degradation rate constant of the substance. Registrants can report substance information on viscosity as: Static viscosity at 20°C provides substance information on the substance’s (static) viscosity per square millimetre per second at a temperature of 20°C. Values are presented in (nano/ micro/milli)gram per litre and/or (nano/ micro/milli)molar per litre. Oral route provides substance information on the substance’s acute toxicity via the oral route.

EC10 / LC10 or NOEC for marine water plants provides substance information on the substance’s effect concentration/lethal concentration for 10% of the tested marine water plants or the no observed effect concentration for marine water plants.

The substance identifiers – if available and not claimed confidential – displayed in the ’Substance identity’ section of the Brief Profile are: In addition, information on the type of substance, origin, number and type of registered compositions and other places where the substance is listed are displayed in this section. ECHA’s Guidance Chapter R.12: Use Descriptor system of ECHA’s Guidance on information requirements and chemical safety assessment, ECHA guidance chapter R.12: Use Descriptor system of ECHA Guidance on information requirements and chemical safety assessment, Guidance on the safe use of the substance, Endocrine disrupter testing in aquatic vertebrates – in vivo. BOD5/ThOD ratio provides substance information on the substance’s BOD5/ThOD ratio values displayed in O2 (milli)gram per gram test material. 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.

Results without measurement conditions (pressure) are not processed for the Brief Profile.

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