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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 200-888-1 | CAS number: 75-64-9
Endpoint summary
Administrative data
Description of key information
Additional information
A calculated logKoc of 1.56 is available (BASF AG, SRC PCKOC v1.66, 2007). This value refers to the uncharged molecule (pKa value: 10.45 - 10.86). This pKa value indicates that the molecule will exist primarily as a cation in the environment and cations generally adsorb stronger to soils containing organic carbon and clay than their neutral counterparts. Hence, the PCKOC-model may underestimate adsorption to organic carbon since it does not consider the ionic structure of the molecule. Under environmental conditions (pH from 5 to 9) the test substance is almost completely present in its charged form (as calculated by the formula % ionised = 100/(1+10(pKa - pH)): 97% at a pH of 9, 100% at lower pH values). In a calculation conducted according to a publication by Franco & Trapp, 2008 using the parameters pKa = 10.45 and log Pow = 0.4 a log Koc value of 4.39 was determined.
If the substance is exposed to water, it will slowly evaporate into the atmosphere from the water surface because of the Henry's Law Constant for the uncharged molecule of 1.79 Pa m³/mol. However, volatilization is expected to be negligible due to the ionic structure of the molecule at environmental conditions.
Due to the results of the Mackay LEVEL 1 calculation, over time the uncharged substance will preferentially distribute into air (55.5%) and water (44.5%). This calculation does not consider the ionic character of the molecule and hence the model may underestimate the distribution into water.
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.
