Registration Dossier
Registration Dossier
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EC number: 253-523-3 | CAS number: 37482-11-4
Endpoint summary
Administrative data
Description of key information
Additional information
No experimental data on any of the environmental endpoints is available for sodium 2 -mercaptoethanolate. The 2-mercapthoethanolate ion is a conjugated base, 2-mercaptoethanol (CAS 60-24-2) its undissociated acid. With a pKa value of ca. 9.5 for both substances, in an aqueous environment with pH 7, they will be present almost exclusively as 2-mercaptoethanol. Therefore, fate parameters in aqueous environments are assessed by by read-across to 2 -mercaptoethanol. More specific considerations on read-across are given in the endpoint specific sections.
All available relevant environmental fate data is tabulated below.
Physchem property |
Key value for assessment |
Comments |
Phototransformation in air |
Half-life: ca 6 hours |
AOPWIN (v1.92) estimation |
Hydrolysis |
Not expected / probable |
According to structural properties |
Biodegradation |
Readily biodegradable |
Brands, 2016 (read across to 2 -mercaptoethanol) |
Adsorption / desorption |
Koc: ca. 2 (log Kow = 0.28) |
KOCWIN (v2.00) estimation (MCI method) (read across to 2 -mercaptoethanol) |
Henry’s Law Constant |
HLC: 0.0129 Pa·m3/mole |
HENRYWIN (v3.20) estimation (Bond method) (read across to 2 -mercaptoethanol) |
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