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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 200-817-4 | CAS number: 74-87-3
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
The substance is gaseous and the primary environmental compartment to which it partition is air.
In accordance with column 2 of REACH Annex IX, the study must not be conducted if exposure to soil and sediment is unlikely.
Key value for chemical safety assessment
Additional information
In Annex X of the Regulation (EC) No 1907/2006 REACH concerning the Registration, Evaluation, Authorisation of Chemicals (REACH), it is suggested, that "in the absence of toxicity data for soil organisms, the equilibrium partitioning method may be applied to assess the hazard to soil organisms. The choice of the appropriate tests depends on the outcome of the chemical safety assessment. In particular for substances that have a high potential to adsorb to soil and sediment or that are very persistent, the registrant shall consider long-term toxicity testing instead of short-term.
But chloromethane is gaseous and the primary environmental compartment to which it partition is air. In accordance with REACH regulation, the studies must not be conducted if exposure to soil and sediment is unlikely. Considering its solubility, volatility and resultant Henry’s Law Constant, chloromethane is expected, under equilibrium conditions, to exist principally in the air.
Absorption of natural organic or inorganic materials in contact with water should not be a significant removal process due to volatility and relatively low octanol/water partition coefficient (SIDS, 2002). Additionally, the substance is not expected to adsorb to suspended solids and sediment based upon the log Koc of 1.12.
Mackay Level III simulations were used to evaluate the effect of source of entry on the distribution and persistence of chloromethane. As expected; the emission of chloromethane directly to air resulted in > 99% of the total chemical mass residing in the air compartment. Only insignificant amounts of chloromethane will be found in the soil or sediment compartments, regardless of source of entry to the environment. Since chloromethane is a gas, most industrial releases are expected to be directly to the air compartment.
Therefore, the substance, exhibits low potential for adsorption, is not bioaccumulative and suggesting little hazardous potential towards sediment organisms. Therefore, the equilibrium partitioning method has been used to assess the hazard potential of chloromethane for soil organisms.
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.
