Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 249-854-8 | CAS number: 29797-40-8
- 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
- Study period:
- 2009
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Calculation with AOPWIN, v1.92
- GLP compliance:
- no
- Specific details on test material used for the study:
- Not applicable
- Estimation method (if used):
- PHOTOCHEMICAL REACTION WITH OH RADICALS
- Concentration of OH radicals: 0.5 E+06 OH/cm³
- Temperature for which rate constant was calculated: 25 °C
- Computer programme: AOP v1.92
- other: 24-h day - Light source:
- other: not applicable
- Details on light source:
- Not applicable
- Details on test conditions:
- Further details not reported
- Temp.:
- 25 °C
- Preliminary study:
- Not applicable
- Test performance:
- No remarks
- DT50:
- 12.165 d
- Test condition:
- 2,4-dichlorotoluene
- DT50:
- 12.165
- Test condition:
- 2,6-dichlorotoluene
- DT50:
- 13.579 d
- Test condition:
- 2,5-dichlorotoluene
- DT50:
- 13.579 d
- Test condition:
- 2,3-dichlorotoluene
- DT50:
- 13.579 d
- Test condition:
- 3,4-dichlorotoluene
- Transformation products:
- not specified
- Results with reference substance:
- Not applicable
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- The half-life of photodegradation in air is calculated to be 12.2 days for 2,4- and 2,6-dichlorotoluene and 13.6 days for 2,3-, 2,5- and 3,4- dichlorotoluene. It may be assumed, that a mixture of these isomeres degrades with a half life of 12.2 - 13.6 days.
- Executive summary:
The degradation of the individual isomers of dichloromethylbenzene in air by reaction with OH-radicals was estimated with the AOP programme (v1.92). Based on a 24-h day with an OH radical concentration of 0.5 E06 OH/cm³ the half lives were calculated to be
- 12.2 days for 2,4- and 2,6-dichlorotoluene and
- 13.6 days for 2,5- , 2,3- and 3,4-dichlorotoluene.
The degradation rates constantes were 1.32 and 1.18 cm³/molecule*sec, respectively.
For the DCT mixture, the longer half life of 13.6 days is applied as worst-case value.
Reference: Lanxess, 2009
Reference
- Degradation rate constant:
2,4-dichlorotoluene: 1.3188 E-12 cm³/molecule*sec
2,5-dichlorotoluene: 1.1815 E-12 cm³/molecule*sec
2,3-dichlorotoluene: 1.1815 E-12 cm³/molecule*sec
3,4-dichlorotoluene: 1.1815 E-12 cm³/molecule*sec
- Fraction sorbed to airborne particulates (which may be resistant to atmospheric oxidation; Junge, Mackay):
2,4 - dichlorotoluene: 2.85 E-006
2,5 - dichlorotoluene: 3.96 E-006
2,3 - dichlorotoluene: 5.73 E-006
3,4 - dichlorotoluene: 4.15 E-006
Description of key information
The degradation of individual isomers of dichloromethylbenzene in air by reaction with OH-radicals was estimated with the AOP programme (v1.92). Half lives were calculated to be (Reference: Lanxess, 2009):
- 12.2 days for 2,4- and 2,6-dichlorotoluene and
- 13.6 days for 2,5-, 2,3- and 3,4 - dichlorotoluene.
For the DCT mixture, the longer half life of 13.6 days is applied as worst-case value.
Key value for chemical safety assessment
- Half-life in air:
- 13.6 d
Additional information
Key study
The degradation of individual isomers of dichloromethylbenzene in air by reaction with OH-radicals was estimated with the AOP programme (v1.92). Based on a 24-h day with an OH radical concentration of 0.5 E06 OH/cm³ the half lives were calculated to be:
- 12.2 days for 2,4-and 2,6-dichlorotoluene and
- 13.6 days for 2,5- , 2,3- and 3,4-dichlorotoluene.
The degradation rates constants were 1.32 and 1.18 cm³/molecule*sec, respectively.
Reference: Lanxess, 2009
Further study
The degradation of dichloromethylbenzene (CAS-No. 29797-40-8) in air by reaction with OH-radicals was estimated with the Atkinson (AOP) and with the MOOH-method.
a) Atkinson (AOP): Based on a 12-h day with a OH radical concentration of 1.5 E06 molecules/cm³, a half-life of 4.51 days was estimated.
b) The calculation according to the MOOH-method with the programme MOPAC vers. 6.00 resulted in a half-life of 14.95 days.
For this QSARs too few data were reported for assessing the reliability.
Reference: Rorije, 1997
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.