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EC number: 263-061-4 | CAS number: 61789-45-5
- 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
readily biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
No study on ready biodegradability is available for fatty acids, dehydrated castor-oil. Therefore, read across from the key studies of oleic acid (C18, 1 double bond; (Z)-9-octadecenoic acid and of a mixture containing linoleic acid as main constituent (C18, 2 double bonds conj.; (Z,Z)-9,12 -Octadecadienoic acid). These experimental data are supported by QSAR predictions on ready biodegradability of linoleic acid.
Coenen (1991) conducted a GLP study according to OECD 301B. After 28 d 93% and 75% of oleic acid (CAS 112 -80 -1) were biodegraded at concentrations of 10 mg/L and 20 mg/L, respectively und thus pass the 60% degradation level. Furthermore, at the lower test concentration (10 mg/L) the 10 day window was met. According to the criteria for ready biodegradation oleic acid (9-Octadecenoic acid, (Z) -) is readily biodegradable. Since the reference substance itself failed the pass criterion for validity (60% degradation was not reached within 14 d), the study should had been repeated.
In addition, oleic acid was tested in a study provided by the Japanese Ministry of the Environment. The GLP-study was conducted according to OECD 301C (2002) under GLP conditions. At a test concentration of 100 mg/L the degradation was determined to be 78% based on BOD/ThOD measurements. According to that result, the substance was characterised as ready biodegradable.
A mixture containing 60% linoleic acid, CAS 60-33-3 (further constituent: 25% oleic acid, CAS 112-80-1; residues: linolenic acid (C18’’’), palmitic acid (C16), myristic acid (C14), stearic acid (C18)) was tested according to BODIS (Küster, 2000). A test which is designed for insoluble substances and which is apparently similar to the “closed bottle test”, OECD 301 D. The average degradation obtained after the 28 day exposure period was determined to be 71%.
Since the tested material consists of structurally similar constituents with different chain-lengths, sequential biodegradation of the individual structures can take place, but all can be considered as readily biodegradable. Referring to Annex I to the OECD Guideline for Testing of Chemicals ‘Revised introduction to the OECD guidelines for testing of chemicals, section 3’ (OECD, March 2006), the 10-day window should not be considered for this UVCB substance and thus should be evaluated as readily biodegradable.
Results of the QSAR model BIOWIN v.4.10 (EPI Suite, 2012) predict ready biodegradability for linoleic acid. This method is based on the application of Bayesian analysis to readily biodegradation data for chemicals, derived collectively from all six OECD301 test methods plus OECD310.
Overall, the fatty acids, dehydrated castor-oil is regarded as readily biodegradable. This judgment is consistent with the hazard assessment presented in the OECD SIDS (2009) for the category “Aliphatic Acids Category” where aliphatic fatty acids with a carbon chain length of C18 were evaluated to be readily biodegradable.
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