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EC number: 273-601-0 | CAS number: 68990-47-6
- 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
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine
- Type of composition:
- legal entity composition of the substance
- State / form:
- solid: bulk
- Reference substance:
- Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine
- Reference substance:
- Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine
- Reference substance:
- Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine
- Reference substance:
- Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine
- Reference substance:
- Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine
- Reference substance:
- Fatty acids, tall-oil, reaction products with diethylenetriamine, maleic anhydride, tetraethylenepentamine and triethylenetetramine
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Persistence Assessment
The persistence assessment has been done using the following data.
Water
Ready biodegradability study: the substance is not considered ready biodegradable under the condition applied in a Closed Bottle test, having not reached the pass level (60% biodegradation) in the 10-day window. However the substance showed a maximum value of 2,7 % of biodegradation under this period leading to consider that some initial biotic degradation started during the test.
Hydrolysis versus pH:
the substance is not considered to hydrolyse. A fully experimental test was not possible due to the lack of a suitable analytical method.
The persistence in the water compartment cannot be totally excluded on the basis of the over-mentioned criteria even if a preliminary biodegradation has been observed. No degradation products are expected as no hydrolytic behaviour has been recorded experimentally.
Soil
Methods for the experimental measurement of adsorption/desorption property for this substance are technically not feasible. On the basis of the very low water solubility and its chemical nature, the substance is expected to have a high ability to absorb to soil. Estimated value of Log Koc (ca. 9) supports the qualitative evaluation of the adsorption/desorption property.
Air
A theoretical assessment of the equilibrium partitioning coefficient air-water was not possible and not reliable on the basis of lack of the vapour pressure results.
The partitioning in the atmospheric compartment is deemed negligible on the basis of the physico-chemical properties and the very low volatilisation capability.
No direct half-life values are available at this level of testing and therefore no direct comparison with P criteria described in annex XIII and Chapter R11 of the Guidance on Information requirements and Chemical Safety assessment is possible.
Furthermore no environmental monitoring data are available.
Conclusion
On the basis of the previous discussion the substance is considered to be Persistent/very Persistent.
Bioaccumulation Assessment
The standard bioaccumulation assessment was not performed for the following reason:
Partition Coefficient Log Po/w test: not available as no suitable analytical method was available due to the peculiar chemical structure of the substance its unknown composition
Bioaccumulation test (BCF data)or other accumulation. and/or toxico-kinetics studies are not available as no suitable analytical method is available due to the peculiar chemical structure of the substance and its unknown composition.
Therefore neither direct comparison with Annex XIII criteria can be done with the available data nor screening criteria for B or vB can be assigned.
On the other end the octanol solubility test performed gave a value of > 30 mg/ml suggesting a good affinity to lipids that may suggest a possible bioaccumulation in organisms. In order to clarify the bioaccumulation potential of this substance the “molecular size and molecular weight approach” was here followed as also suggested by related guidance on PBT assessment.
A molecular modelling calculation was therefore performed applied on the following hypothetical worst case chemical structure. The substance is an UVCB one, a complex reaction product, then its exact composition is unknown. The structure below is the smallest molecule arising from the chemical synthesis, then it represents the worst case for the assessment of the bioaccumulation potential.
A calculation of the molecular length and diameter has been done by Prof. Alessia Bacchi, Department of Chemistry,,.
Two possible isomers have been considered: cis/trans referring to the cis/trans configuration of the central maleic/fumaric mojety as showed in the structure. In each case the most extended conformation has been built as a starting model in order to give an estimate of the maximum possible molecular length. The energies of the two structures have been minimized by molecular mechanics using the Universal Force Field.Molecular dimensions (length and diameter) has been measured for the two minimized structures as distances between the two extreme atoms along the directions of maximum length and along the diameter in the central section of the molecule.
The following table shows the obtained results:
CIS
TRANS
Length of the substance
(MML=Maximum Molecular Length) (nm)
5.7
6.0
Average maximum diameter
(Dmax aver) (nm)
0.33
0.33
Molecular weight
813.25
These values were used in the Bioaccumulation assessment following criteria set down by the PBT Assessment guidance (Chapter R11).
First of all the Molecular Weight (MW) of813.25is greater than the threshold level of 700 given in the guidance and therefore the substance is not considered a vB substance, as it is generally consider that it’s unlikely to have a BCF > 5000. It is, in fact, accepted (EU TGD, EC 2003) that molecules with a MW higher than 700 are less likely to be absorbed and bioconcentrate. It is as well accepted that the MW alone is not sufficient to guarantee a complete B assessment and a weigh of evidence approach using some other indicators would be more appropriate. Such indicators are normally calculated from molecular modelling approaches and information on molecular size can strengthen the evidence for a limited bioaccumulation potential of the substance.
In our case further two indicators are available could be used to build up a good rationale for the bioaccumulation assessment: length and diameter of the molecule. The diameter of the molecule is here not of help for the fact that the structure is distributed along a chain of atoms.
The length of the molecule is indeed very indicative. The length (5.7 – 6.0) is largely exceeding the value of 4.3 nm given by the guidance
It is well know and experimented that molecules having a length greater that 4.3 nm would not pass biological membranes at all, either in the gill of in the gut, based on a series of bioaccumulation and bioconcentration studies with linear and cyclic polidimethylsiloxanes (PDMS or silicones) varying in chain length. The passage of these molecules through biological membranes is very unlikely since it would mean that the entire interior of the lipid membrane would be disturbed. Furthermore Molecular Weight did not explain alone the reduced uptake since one of the substance with MW of 1.050 was found in the fish. Additionally the cross diameter itself could not explain the reduce uptake since those were smaller or equal to those of the substances that did bioaccumulate strongly in such studies. Therefore the main indicator for bioaccumulation is the length of the substance; better if associated with Molecular Weight.
The assumption that the substance under this registration is not a bioccumulative one is also supported by the fact that it is consider not to be bioavailable in the toxicity studies. In the combined OECD 422 study the substance did not induce any systemic effects both for toxicity and reproductive end-points after gastric gavage. The adverse effects seen in lungs is considered a local effect possibly consequence of an aspiration pneumonitis with equivocal mechanism of action.
Conclusion
On the basis of the previous discussion the substance is not considered to bioaccumulate in the aquatic organism as it is not able to pass the biological membranes.
Toxicity Assessment
The toxicity assessment has been performed using the following data/information:
a) evidence of classification from mammalians studies
b) classification for carcinogenesis, mutagenesis or reproductive toxicity
c) Acute eco-toxicological studies performed at the solubility levels
a) there is no evidence of classification from mammals studies as T or Xn R48 end-points
b) the substance is not a CMR
c) acute effects and classification
- Acute toxicity in fish : LC50 > 100 mg/L, NOEC > 100 mg/L
- Acute toxicity in daphnia : 48 h EC50 > 100 mg/L; 48 h NOEC > 100 mg/L,
- Acute toxicity in algae : EC 50 > 100 mg/L (mass and growth); NOEC 50 > 100 mg/L (mass and growth)
As already reported, the eco-toxicological acute studies were performed using the nominal concentration as no suitable analytical method was available and applicable to such studies. It is here assumed that the environmental species used in such studies (fish, daphnia and algae) were exposed during the studies to a real dose of 2.17 mg/L which is the value calculated in the water solubility study. Such concentration is considered realistic as is the higher solubility concentration that can be present in the environment in case of release of the substance in it. Therefore the previous results can be converted as follows:
- Acute toxicity in fish : LC50 > 2.17 mg/L, NOEC > 2.17 mg/L
- Acute toxicity in daphnia : 48 h EC50 > 2.17 mg/L, 48 h NOEC > 2.17 mg/L,
- Acute toxicity in algae : EC 50 > 2.17 mg/L (mass and growth); NOEC 50 > 2.17 mg/L (mass and growth)
All acute data from eco-toxicological experimental studies are not lower than 0.01 mg/L but largely higher (the lowest is 48 h EC50 > 2.17 mg/L) not leading to any classification due to testing at the solubility value and lack of any effects at such concentration.
In conclusion, base on the over-mentioned, data the substance is not considered to cover the criteria of the T assessment.
1.1.2 Summary and overall Conclusions on PBT or vPvB Properties
The assessment of PBT/vPvB properties has been done on the basis of the data available from the testing programme as well as from some calculated approaches in order to evaluate the Bioccumulation potential and referring to the principles laid down in the “Guidance on information requirements and chemical safety assessment Parc C: PBT Assessment and Chapter 11: PBT Assessment”.
An overall estimation of the available data/information discussed in previous paragraphs lead to consider that they do not allow a direct comparison with all the criteria in Annex XIII but nevertheless indicates that the substance do not have these properties and the substance is not considered to be a PBT or vPvB. Additionally the substance is not absorbed in the organism as it was seen in the combined OECD 422 study (Toxicity and reproductive end-points) and it hence not considered to biomagnify along the food chain on the basis of secondary poisoning argumentation as discussed in the specific paragraph.
Conclusion : the substance is not a PBT or vPvB chemical.
Reference
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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