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Diss Factsheets
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EC number: 220-290-4 | CAS number: 2702-72-9
- 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 and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
Dissipation half-life of hydrolysis product in water/sediment system (2,4-Dichlorophenoxyacetic acid) = 29 days
Key value for chemical safety assessment
Additional information
No experimental data investigating the biodegradation in water of sodium 2,4-dichlorophenoxyacetate (CAS No. 2702-72-9) were available. This substance is highly soluble and it is rapidly dissociated in water, being 2,4-dichlorophenoxyacetic acid (CAS No. 94-75-7) its main product. Therefore, a conclusion on this endpoint was drawn based on data from 2,4-dichlorophenoxyacetic acid. The aerobic biodegradation of 14C 2,4-D in a water/sediment system was investigated by Concha and Shepler (1993). This study was conducted according to US EPA 40 CFR 158.130 Subdivision N (162 -4), Aerobic Aquatic Metabolism, under GLP conditions. The test substance was incubated for 46 days at a temperature of 25°C and radiocarbon measured periodically. After a lag period of 25 days, 2,4-D degraded rapidly. The major metabolite was CO2 (63.9% of the applied radioactivity on day 46). The estimated dissipation half-life of the test substance in the water/sediment system was 29 days.
Simulation testing on biodegradation of sodium 2,4-dichlorophenoxyacetate in sediment is not deemed necessary due to the low adsorption potential of its hydrolysis product, 2,4-dichlorophenoxyacetic acid (Koc = 56*)
* "Review report for the active substance 2,4 -D". European Comission, Health and Consumer Protection Directorate-General, Directorate E: Food safety: plant health, animal health and welfare, international questions, E1- Plant Health (2001)
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