Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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: 202-239-8 | CAS number: 93-34-5
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- 5-chloro-2-methoxybenzenediazonium chloride
- Type of composition:
- legal entity composition of the substance
- State / form:
- solid: particulate/powder
- Reference substance:
- 5-chloro-2-methoxybenzenediazonium chloride
- PBT status:
- the substance is not PBT / vPvB
- Justification:
The test substance is deemed not PBT or vPvB. This conclusion was drawn based on the screening criteria for P, B and T. Screening criteria were used due to lack of other data, as the registration regards the tonnage band 10 -100 tpa.
Persistency (P) assessment
Since the substance could not be isolated for testing (explosion hazard), biodegradability of the test substance was not determined experimentally. Instead, QSAR results obtained with BioWin v.4.10 (available in EpiSuite) were used as screening information. Taken together the 7 BioWin predictions, the prediction is that the substance is not readily biodegradable.
Based onTable R.11 -4 in the ECHA guidance R. v. 3.0 (2017) following screening information is collected:
- Biowin 2: Biodegrades fast
- Biowin 3: Ultimate degradation timeframe is weeks - months (value = 2.48, hence > cut-off 2.25)
- Biowin 6: Not readily biodegradable (value = 0.1604)
Based on the available data, no conclusion on the persistency criteria can be drawn.
Bioaccumulation assessment (B and vB)
Since the substance could not be isolated for testing (explosion hazard), partition coefficient of the test substance was not determined experimentally. An estimate for the partition coefficient was obtained using KOWWIN v.1.68 (available in EpiSuite). The estimated log Kow = 3.08. This is below the screening criteria for log Kow being 4.5.
Additionally, an estimate for BCF was obtained using BCFBAF v.3.01 (available in EpiSuite). The estimate for BCF is 50.14 L/kg. This value is far below the B criterion of 2000 L/kg.
Taken together the information on log Kow and BCF, the diazonium salt is regarded as not B.
Toxicity assessment (T)
Simillarly, since the substance could not be isolated for testing (explosion hazard), no toxicological nor ecotoxicological data were generated. The toxicity assessment could hence not be performed.
Reference
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.
