Registration Dossier
Registration Dossier
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EC number: 204-699-5 | CAS number: 124-41-4
Endpoint summary
Administrative data
Description of key information
Additional information
In water, sodium methanolate rapidly hydrolyses to methanol and sodium hydroxide (OECD, 2002). Sodium hydroxide further dissociates in the environment to sodium and hydroxyl ions. Both ions do not have the potential for adsorption on particulate matter or surfaces (OECD, 2002). For methanol, measured and calculated Koc values < 1 demonstrate a low adsorption potential (Lokke, 1984; Howard, 1990; study director, 2004). The low potential for adsorption is also indicated by a log Pow of -0.77.
The Henry's Law constant for sodium methanolate was calculated by QSAR and resulted in a value of 0.304 Pa m³/mole (Study director, 2005) (based on methanol as surrogate). Similary, Gaffney et al. (1987) published a Henry’s law constant of 0.461 Pa m³/mole for methanol. Hence, sodium methanolate and its degradation product methanol are not expected to significantly volatilise from surface water and volatilisation is not a significant removal process from the aquatic compartment. Sodium hydroxide dissociates in water and is also expected to remain in the aquatic compartment.
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