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EC number: 270-232-7 | CAS number: 68413-60-5
- 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
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Endpoint summary
Administrative data
Description of key information
Additional information
According to the RAR for EDTA (CAS 60-00-4), EDTA is resistant to hydrolysis. Neither strong acids nor alkalis cause any degradation. Based on structural similarity (for read-across justification see IUCLID section 13), this is also applicable for EDTA-FeNH4(NH4)OH.
Photolytic degradation of the Fe(III)-EDTA complex in aqueous solution is reviewed in the EU RAR for EDTA (2004). Photodegradation will occur in surface water, in particular during summer and in the upper water layer.
Photodegradation does not result in complete mineralization, but as the degradation products ED3A, EDDA and EDMA are readily biodegradable the combined effect of daylight UV and bacteria will be a complete mineralization (Nowack and Baumann 1998 in Bucheli-Witschel, Egli 2001).
Frank and Rau (1990) determined the quantum yields and made model calculations for the half-life value in surface water in central Europe. Between summer and winter the half-lives varied between 5 and 480 hours. Svenson et al (1989) estimated a half-live of 11 minutes at the top layer of a water body in early summer.
In field studies at the Swiss river Glatt half-lives varied between 20 – 100 minutes for summer and winter respectively (Kari 1994).
Other metal complexes like Co(III) and Mn(II) showed much slower rates of photodecomposition, whereas complexes with Zn, Cu and Ca appear inert to photodegradation (Kari, 1994).
In the EU RAR a worst case approach is used with a half-life of 20 days for the Fe(III)-EDTA complex only. Based on studies of Kari (1994) a separation of photolytical stable and unstable EDTA species can be made and 25- 50% of EDTA is discharged as the unstable Fe(III)-complex. In the estimation for the regional PEC it is assumed that in the environment 75 % will end in a stable form (mainly Ca), whereas 25% is degraded with a half-live of 20 days.
This approach is conservative because it does not take in consideration that after degradation of Fe(III)-EDTA, the Fe(III) can become available again for displacement of stable Ca-complexes. The rate of displacement will of course depend mainly on the pH and the relative concentrations of various metal ions in the specific surface water. The above figures show that at variations of pH between pH 7 and 8 there will be almost equal amounts of Ca- en Fe EDTA complex, so molecules Fe(III)-EDTA that are degraded will be replaced until all EDTA has disappeared.
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