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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 915-586-1 | CAS number: -
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- no data: aquatic toxicity unlikely
Marine water
- Hazard assessment conclusion:
- no data: aquatic toxicity unlikely
STP
- Hazard assessment conclusion:
- no data: aquatic toxicity unlikely
Sediment (freshwater)
- Hazard assessment conclusion:
- no hazard identified
Sediment (marine water)
- Hazard assessment conclusion:
- no hazard identified
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- no hazard identified
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Reaction mass of 2,4-bis(xylylazo)resorcinol and 2,4-bis[(4-dodecylphenyl)azo]resorcinol and 2-[(4-dodecylphenyl)azo]-4-(2,4-xylylazo)resorcinol is highly insoluble and there is no expected toxicity at levels up to the water solubility. In addition, the substance is not readily biodegradable based on biodegradation estimates. Furthermore, the log Kow of this substance is ≥ 4. Taken together, this information indicates that Reaction mass of 2,4-bis(xylylazo)resorcinol and 2,4-bis[(4-dodecylphenyl)azo]resorcinol and 2-[(4-dodecylphenyl)azo]-4-(2,4-xylylazo)resorcinol should be classified as Aquatic Chronic 4 in accordance with the criteria stipulated under the Regulation 1272/2008 (CLP). However based on the available information from the primary constituents of the substance, the log kow for the substance was determined to be > 6.5. In accordance with the screening criteria for bioaccumulation in the ECHA Guidance (Chapter R.11 PBT Assessment) the substance would screen as a potential bioaccumulative substance. The likely reliability of the log Kow is however, considered to diminish above a value of 6, as noted in Appendix R.11-1 Annex 1 of ECHA guidance on PBT assessment. Substances with log Kow between 4.5 and 6 are considered likely to be highly accumulating; however no substantial bioconcentration is assumed having a log Kow value greater than 6. For compounds having a log Kow greater than 6, a gradual decrease of BCF is observed and it has been hypothesised within the published literature that a high log Kow is more an effect of solubility than a tendency of the substance to be lipophilic.This was coincided with the data from peer reviewed publications, articles and read across substances; where the BCF value was indicative of low bioaccumulation potential (BCF < 500).
On the basis of the available information the substance is not considered to be bioaccumulative. However, in the absence of further information, Aquatic Chronic 4 is applied on a worst case basis.
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.
