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EC number: 205-593-1 | CAS number: 143-23-7
- 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
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- For details on endpoint specific justification please see read-across report in section 13 or find a link in cross-reference “read-across: supporting information
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- assessment report
- Key result
- Sample No.:
- #1
- Type:
- Kd
- Value:
- 201 L/kg
- Temp.:
- 20 °C
- Matrix:
- soil (no. 1)
- Remarks on result:
- other: Kd not dependent on organic carbon
- Key result
- Sample No.:
- #2
- Type:
- Kd
- Value:
- > 51 000 L/kg
- Temp.:
- 20 °C
- Matrix:
- soil (no. 2)
- Remarks on result:
- other: Kd not dependent on organic carbon
- Key result
- Sample No.:
- #3
- Type:
- Kd
- Value:
- 18 333 L/kg
- Temp.:
- 20 °C
- Matrix:
- soil (no. 3)
- Remarks on result:
- other: Kd not dependent on organic carbon
- Key result
- Sample No.:
- #4
- Type:
- Kd
- Value:
- 6 914 L/kg
- Temp.:
- 20 °C
- Matrix:
- soil (no. 4)
- Remarks on result:
- other: Kd not dependent on organic carbon
- Key result
- Sample No.:
- #5
- Type:
- Kd
- Value:
- 152 L/kg
- Temp.:
- 20 °C
- Matrix:
- river sediment (no. 5)
- Remarks on result:
- other: Kd not dependent on organic carbon
- Validity criteria fulfilled:
- yes
- Conclusions:
- Binding of BHT to soils was strong: Kd values were between 201 (soil I) and >51000 (soil II) L/kg (log Kd between 2.3 and >4.7, respectively), for the sediment sample the Kd value was 152 L/kg (log Kd 2.2).
Binding was not a function of organic carbon content of the soils. Rather, clay and silt content might be decisive.
Desorption was observed. However, within 120 h extent of desorption was limited and seems to be a slow process. - Executive summary:
The adsorption/desorption behaviour of BHT amine containing the main constituents BHT (64.8%) and HMD (13.8%) was investigated using four soil types covering a range of different soil properties: Speyer 2.1 (soil I, sand), Speyer 6S (soil II, clay), Empingham (soil III, clay loam), Mechtildshausen (soil IV, loam) and sediment of the River Rhine (soil V, sandy loam). Sorption of BHT to the investigated soils was strong but showed a dependency on the soil involved and on the soil-to-solution ratio used. Sorption was strongest to the clay soil (soil II) and weakest to the sand soil (soil I). With the exception of the river sediment (Soil V), sorption increased with increasing clay content. No correlation of sorption and the soil properties pH value, cation exchange capacity and organic carbon content was observed. The sorbed fraction of analyte increased with the amount of soil used in the batch systems. Apparent equilibrium distribution was reached within 48h. Desorption was investigated for 120h after the 48h adsorption phase. Little desorption was observed and constant solution phase concentrations were reached between 24h and 120h. The adsorption coefficients were calculated after 48h of adsorption, whereas desorption coefficients were calculated after 120h of desorption.
Kd values for BHT were between 201 (soil I) and >51000 (soil II) L/kg (log Kd between 2.3 and >4.7, respectively), for the sediment sample the Kd value was 152 L/kg (log Kd 2.2).
The calculated adsorption and desorption distribution coefficients were independent of the organic carbon content. Therefore, any environmental fate assessment should preferably be based on Kd_ads or Kd_des values.
The study used as source investigated Reaction mass of 7-azatridecane-1,13-diamine and hexamethylenediamine (EC 907 -605 -7, which contains relevant amounts of the submission substance,
7-azatridecane-1,13-diamine). The study results of the source compound were considered applicable to the target compound. Justification and applicability of the read-across approach (structural analogue) is outlined in the read-across report in section 13 or find a link in cross reference “assessment report”.
Reference
Description of key information
The adsorption/desorption behaviour of BHT amine containing the main constituents BHT (64.8%) and HMD (13.8%)
was investigated using four soil types covering a range of different soil properties: Speyer 2.1 (soil I, sand), Speyer 6S (soil II, clay), Empingham (soil III, clay loam), Mechtildshausen (soil IV, loam) and sediment of the River Rhine (soil V, sandy loam). Sorption of BHT to the investigated soils was strong but showed a dependency on the soil involved and on the soil-to-solution ratio used. Sorption was strongest to the clay soil (soil II) and weakest to the sand soil (soil I). With the exception of the river sediment (Soil V), sorption increased with increasing clay content. No correlation of sorption and the soil properties pH value, cation exchange capacity and organic carbon content was observed. The sorbed fraction of analyte increased with the amount of soil used in the batch systems. Apparent equilibrium distribution was reached within 48h. Desorption was investigated for 120h after the 48h adsorption phase. Little desorption was observed and constant solution phase concentrations were reached between 24h and 120h. The adsorption coefficients were calculated after 48h of adsorption, whereas desorption coefficients were calculated after 120h of desorption.
Kd values for BHT were between 201 (soil I) and >51000 (soil II) L/kg (log Kd between 2.3 and >4.7, respectively), for the sediment sample the Kd value was 152 L/kg (log Kd 2.2).
The calculated adsorption and desorption distribution coefficients were independent of the organic carbon content. Therefore, any environmental fate assessment should preferably be based on Kd_ads or Kd_des values.
Key value for chemical safety assessment
Other adsorption coefficients
- Type:
- log Kp (solids-water in soil)
- Value in L/kg:
- 4.281
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in sediment)
- Value in L/kg:
- 4.57
- at the temperature of:
- 20 °C
Other adsorption coefficients
- Type:
- log Kp (solids-water in suspended matter)
- Value in L/kg:
- 4.57
- at the temperature of:
- 20 °C
Additional information
For Kp (solids-water in soil), the arithmetic mean value over four soils was used (19112 L/kg).
For both, Kp (solids-water in sediment) as well as Kp (solids-water in suspended matter), the value derived from soil V (river Rhine sediment) was used (37132 L/kg).
No data are available for STP sludge adsorption.
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