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EC number: 216-768-7 | CAS number: 1663-39-4
- 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
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Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Tert-butyl acrylate is not readily biodegradable according to OECD criteria. Tert-butyl acrylate is partly or moderately biodegradable.
Key value for chemical safety assessment
Additional information
In a CO2-Headspace test according to ISO 14593 which is identical to OECD 310 (Ready Biodegradability - CO2 in sealed vessels) tert-butyl acrylate was moderately or partly biodegradable. The inoculum used in this study was municipal activated sludge from the domestic wastewater treatment plant of the City of Mannheim. The assay was conducted at a test substance concentration of 30.5 mg/L equivalent to 20 mg/L TOC at 22 °C in the dark. After 28 days a biodegradation degree of 50 - 60 % (range of three test assays: 53 - 63 %; mean value: 59 % TIC/TOC) was determined. The 10-day-window criterion for ready biodegradability was not fulfilled (BASFSE, 2008).
The biodegradability of tert-butyl acrylate was also investigated in several batch tests for ready biodegradability. In a manometric respirometry test (OECD 301 F) with non-adapted domestic sludge the biodegradation of tert-butyl acrylate was 32 % within 28 days and 38 % within 43 days (range of six test assays: 30 - 50 %), respectively (BASF 1993). Performing this test with adapted domestic sludge increased the degradation to 56 % within 28 days (range of six test assays: 38 - 67 %) (BASF 1994).
Primary degradation products predicted for tert-butyl acrylate by Q(SAR) modeling (OASIS, Catalogic v5.10.5) are acrylic acid and tert-butanol. Acrylic acid is readily biodegradable according to OECD criteria (Huels, 1995; BAMM, 1991). The biodegradability of tert-butanol was investigated in a CO2-Headspace test according to ISO 14593 (non-GLP). After 28 days a biodegradation degree of 70 - 80 % was determined (BASFSE 1997). Due to a longer lag-phase, the 10-day-window criterion for ready biodegradability was not met. Based on these test results, tert-butanol was considered to be biodegradable.
All other acrylates that are included in the read-across justification regarding ecotoxicity, are readily biodegradable with the exception of tert-butyl acrylate. Due to its branched molecular structure, slower biodegradation than observed for the other members is expected. Based on the presented test results, tert-butyl acrylate is considered to be not readily biodegradable according to OECD criteria. Tert-butyl acrylate is partly or moderately biodegradable. Since its degradation products acrylic acid and tert-butanol are readily biodegradable and biodegradable, respectively, ultimate biodegradation of tert-butyl acrylate in the environment is indicated. Formation of persistent breakdown products is not expected.
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