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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 217-126-9 | CAS number: 1746-23-2
- 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:
- (Q)SAR
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: The US EPA EPISUITE modelling programme is adequately validated and therefore suitable for use.
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- QSAR calculation addressing degradation through the gas-phase reaction between photochemically produced hydroxyl radicals and organic chemicals. It also estimates the rate constant for the gas-phase reaction between ozone and olefinic/acetylenic compounds.
- GLP compliance:
- no
- Specific details on test material used for the study:
- Details on properties of test surrogate or analogue material (migrated information):
not applicable - Estimation method (if used):
- AOPWIN v1.92
- Key result
- DT50:
- >= 4.162 - <= 13.097 h
- Test condition:
- Qsar calculation
- Transformation products:
- no
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- The primary route of removal from the atmosphere is through the gas-phase reaction between ozone or photochemically produced hydroxyl radicals and the test substance. The model shows that removal from the atmosphere is rapid, therefore the material is not expected to accumulate in this compartment.
- Executive summary:
The AOPWIN v1.92 model indicates that the test substance is rapidly removed from the atmosphere by both the gas-phase reaction with photochemically produced hydroxyl radicals and with ozone. The DT50 via the OH route is 4.162 h and via the ozone route 13.097 h.
Reference
OVERALL OH Rate Constant = 30.8405 E-12 cm3/molecule-sec
HALF-LIFE = 0.347 Days (12-hr day; 1.5E6 OH/cm3)
HALF-LIFE = 4.162 Hrs
OVERALL OZONE Rate Constant = 2.100000 E-17 cm3/molecule-sec
HALF-LIFE = 0.546 Days (at 7E11 mol/cm3)
HALF-LIFE = 13.097 Hrs
Description of key information
Phototransformation in air was estimated using the AOPWIN v1.92 model, which indicated that the substance is rapidly removed from the atmosphere by both the gas-phase reaction with photochemically produced hydroxyl radicals and with ozone. The DT50 via the OH route was 4.162 h and via the ozone route 13.097 h. The mean half-life was 8.629 h.
Key value for chemical safety assessment
- Half-life in air:
- 8.629 h
- Degradation rate constant with OH radicals:
- 30.84 cm³ molecule-1 s-1
Additional information
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.