Registration Dossier
Registration Dossier
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EC number: 231-209-7 | CAS number: 7446-81-3
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
In contact with water no hydrolysis of sodium acrylate will be observed.
Key value for chemical safety assessment
Additional information
No experimental data on the test substance is available. Therefore, the evaluation of the endpoint hydrolysis is based on a weight of evidence approach using the data of the structural analogue acrylic acid (CAS 79-10-7) (for WoE information, see chapter 13.2).
Based on the structural similarity and dissociation behavior (Henderon-Hasselbach calculation) of NaA (sodium acrylate) in aqueous environment data from an reliable experimental study with AA (acrylic acid) was used to access the hydrolysis potential of NaA. Due to the pH dependency of the reaction shift toward AA (at low pH values), the data for AA picture the worst-case scenario.
The rate and route of hydrolysis of radiolabeled (14C) AA was determined at pH 3, 7 and 11 in accordance to Environmental Protection Agency Guidelines, 40 CUR Part 796.3500 over 28 d in a buffered solution The study was conducted under light exclusion to prevent photodegradation processes. The samples were taken as triplicates and measured via HPLC. No rate constants or half-life could be calculated since AA was stable at all measured pH-values. The study was conducted in compliance with GLP regulations and was classified as highly reliable .
Therefore, hydrolysis will not contribute to abiotic degradation of AA or NaA.
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