Registration Dossier
Registration Dossier
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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
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EC number: 203-571-6 | CAS number: 108-31-6
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- 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
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Estimated by calculation
- Adequacy of study:
- key study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- Calculated using structure-reactivity relationships and linear free-energy relationships.
- GLP compliance:
- no
- Estimation method (if used):
- PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 1,000,000 molecule/cm³
- Degradation rate constant: 4.6E-11 cm³/(molecule*sec) - DT50:
- 8.5 h
- Test condition:
- OH concentration = 500000 molecules/cm³, rate constant = 4.6E-11 cm³/molecule*s
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- Half life: 8.5 hours
- Executive summary:
A calculation assuming a sensitizer-concentration (OH-radical) of 1,000,000 molecules/cm³ and a rate constant of 4.3E-11 cm³/molecule*sec predicted a half-life in the atmosphere of 4.5 hours (Grosjean and Williams, 1991, cited in OECD SIDS 2004). Taking into account a regular OH concentration of 500,000 molecules/cm³ the half-life increases to 8.5 hours.
Reference
Developed structure-reactivity relationships between reaction rate constant and ionization potential for classes of compounds.
Reaction products expected were CO, CO2,and dicarbonyls, which undergo further rapid reaction.
Description of key information
After evaporation or exposure to the air, the substance will be rapidly degraded by photochemical processes.
Key value for chemical safety assessment
Additional information
A calculation assuming a sensitizer-concentration (OH-radical) of 1,000,000 molecules/cm³ and a rate constant of 4.3E-11 cm³/molecule*sec predicted a half-life in the atmosphere of 4.5 hours (Grosjean and Williams, 1991, cited in OECD SIDS 2004). Taking into account a regular OH concentration of 500,000 molecules/cm³ the half-life increases to 8.5 hours. Nevertheless, photodegradation is not supposed to be an important fate path in the atmosphere as the substance would hydrolyse rapidly with the atmospheric water forming maleic acid.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.