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EC number: 439-840-1 | CAS number: 20846-91-7
- 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
[S,S]-EDDS acid and its trisodium salt have been shown to be readily biodegradable - with biodegradation rates of at least 75% within 28 days - in the modified Sturm test (Guekens, 1993a; Schowanek et al. 1997), unacclimated river water die-away test (Jaworska et al. 1999; Schowanek et al. 1997), semi-continuous activated sludge test (Schowanek et al. 1997) and the batch-activated sludge tests with acclimated and unacclimated sludge (Schowanek et al. 1997). Where relevant, these tests were conducted in line with corresponding OECD Guidelines.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
A ready biodegradability test using activated sludge and carried out according to OECD Guideline 301 B (in compliance with GLP) indicated that, in an aerobic aqueous medium, trisodium EDDS was readily biodegradable. In this modified Strum test, initial test concentrations were 10 and 20 mg/L, and biodegradation reached at least 83% and 88% by days 28 and 35, respectively (Geukens, 1993a; Schowanek et al. 1997).
In an unacclimated river water die-away test, degradation of [S,S]-EDDS [it is not clear whether the test was performed on the radio-labelled acid or its corresponding trisodium salt] was similar to that seen in the modified Sturm test, reaching 75%, corresponding to a half-life of about 6.3 days. This suggests that biodegradation also occurs under realistic environmental conditions (Jaworska et al. 1999; Schowanek et al. 1997).
In addition, in a (semi-)continuous activated sludge (SCAS) test carried out according to OECD Guideline 302A, trisodium EDDS was readily biodegradable. Over a 7 -day acclimation period 40 mg/L was added to the test system, and biodegradation reached 97% by day 7 of the test period (Schowanek et al. 1997).
Batch-activated sludge tests on [S,S]-EDDS [it is not clear whether the test was performed on the radio-labelled acid or its corresponding trisodium salt] with acclimated and unacclimated sludge indicated biodegradation of 94% and 84%, respectively, within 28 days (Schowanek et al. 1997).
[Data on trisodium EDDS is considered relevant to use for understanding the potential biodegradability of EDDS acid, and is acceptable for using as read-across information].
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