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EC number: 231-209-7 | CAS number: 7446-81-3
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Based on results of the structural analogue acrylic acid, sodium acrylate is readily biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
Based on the structural similarity and dissociation behavior of sodium acrylate in aqueous environment (see attached WoE justification in chapter 13.2), data from two highly reliable (Klimisch score 1) experimental studies with acrylic acid were mainly used to access the biodegradation potential of sodium acrylate. Due to the pH dependency of the reaction shift toward acrylic acid (at low pH values), the data for acrylic acid picture the worst-case scenario. Reliable QSAR calculations with sodium acrylate were used to support these findings (Klimisch score 2).
The biodegradability in water of the structural analogue acrylic acid was assessed in an experimental study according to GLP regulations and guideline EU Method C.4-A (Determination of the “Ready” Biodegradability -Dissolved Organic Carbon (DOC) Die-Away Test) (HuelsAG, 1995). Domestic activated sludge from a German municipal waste water treatment plant with a sludge concentration of 3.8 g/L was exposed to an initial test substance concentration of 15.08 mg/L DOC for 9 d. The DOC removal was measured via an infrared analyzer and compared to the reference substance benzoic acid, sodium salt and a blank control. After 9 d more than 90 % were degraded. According to OECD criteria acrylic acid is readily biodegradable. Based on the structural similarity and the dissociation process to acrylic acid, this can also be assumed for sodium acrylate.
The results from another reliable experimental study according to OECD guideline 301 D (Ready Biodegradability: Closed Bottle Test) confirm this finding (BAMM, 1991; REACH Dossier). The study was conducted according to GLP regulations, but only the draft report is available. Since study followed an OECD guideline and generally the GPL regulations, the results are considered trustworthy and no relevant deviations from the final report are expected. A comparable inoculum was used and exposed to 3 mg/L test substance over 28 d. The same reference was used to assure the quality of the test system. The degradation was measured by the oxygen consumption over time. After 28 d more than 80 % were degraded and the OECD 10-day window criterion for readily biodegradability was fulfilled.
Sodium acrylate is dissociating fast in aqueous medium (see Henderson-Hasselbach calculation). Therefore, no experimental studies can be conducted with sodium accrylate in water. To support the information from the studies with the structural analogue acrylic acid, QSAR calculations have been carried out with OASIS CATALOGIC v.5.14.1 and the model CATALOGIC Kinetic 301B v.02.10. Since sodium acrylate is a salt, it was not falling in the structural domain of the model and was therefore not completely within the applicability domain. Apart from that, NaA fulfils the general chemical properties requirements and is in the metabolic domain of the model. In order to this, the calculation can be considered reliable in combination with the experimental data from acrylic acid. Sodium acrylate and its possible metabolites were predicted to be ready biodegradable according to OECD criteria.
The entire data consisting of experimental studies for acrylic acid and a QSAR calculation with sodium acrylate indicate a fast biodegradation process for sodium acrylate and give no indication for persistence.
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.
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