Registration Dossier
Registration Dossier
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EC number: 271-880-3 | CAS number: 68610-90-2
Endpoint summary
Administrative data
Description of key information
The category member substance is not considered to be a skin or an eye irritant.
Key value for chemical safety assessment
Skin irritation / corrosion
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
No data are available for the substance therefore data on a category substance -Didodecyl fumarate (CAS 2402-58-6) are used for the assessment of skin and eye irritation. This substance was selected for testing, because it represents the category member with the shortest fatty alcohol side chain, and consequently with the lowest molecular weight, which is regarded as worst-case approach in terms of hazard assessment of the PFAE fumarates for the local as well as for systemic effects.
Skin irritation:
The potential of Didodecyl fumarate to cause dermal irritation was assessed by a single topical application of 25 µl bulk volume (about 15 mg) of the undiluted test substance to a reconstructed three dimensional human epidermis model according to OECD 439 (Remmele, 2013). Three EpiDerm TM tissue samples were incubated with the test substance for 1 hour followed by a 42-hour post-incubation period. Tissue destruction was determined by measuring the reduction of mitochondrial dehydrogenase activity, indicated by reduced formazan production after incubation with a tetrazolium salt (MTT). The formazan production after incubation with a substance treated epidermal tissues is compared to that of negative control tissues. The quotient of both values indicates the relative tissue viability. The EpiDerm TM skin irritation test showed the following results: The test substance is not able to reduce MTT directly. The mean viability of the test substance treated tissues determined after an exposure period of 1 hour and after 42 hours post-exposure was 96 %.
Based on the observed results and applying the evaluation criteria it was concluded, that the test substance does not show skin irritation potential in the EpiDerm TM skin irritation test under the test conditions chosen.
Eye irritation:
The potential of Didodecyl fumarate to cause ocular irritation was assessed by a single topical application of 50 µl bulk volume (about 22 mg) of the undiluted test substance to a reconstructed three dimensional human cornea model (EpiOcular TM) (Remmele, 2013). Two EpiOcular TM tissue samples were incubated with the test substance for 90 minutes followed by an 18-hour post-incubation period. Tissue destruction was determined by measuring the reduction of mitochondrial dehydrogenase activity, indicated by reduced formazan production after incubation with a tetrazolium salt (MTT). The formazan production after incubation with a substance treated epidermal tissues is compared to that of negative control tissues. The quotient of the values indicates the relative tissue viability. The EpiOcular TM eye irritation test showed the following results: the test substance is not able to reduce MTT directly. The mean viability of the test substance treated tissues was 82 %.
Based on the observed results and applying the evaluation criteria it was concluded, that the test substance does not show an eye irritation potential in the EpiOcular TM eye irritation test under the test conditions chosen.
Conclusion for irritation
In conclusion, the skin irritating properties of the PFAE fumarate category members have been investigated in a validated in-vitro study indicating no or very low skin irritating properties. Moreover, skin irritation is expected to decrease with increasing fatty alcohol chain length. Thus skin irritating properties of the PFAE fumarate category members have been investigated using the mono-constituent category member Didodecyl fumarate (CAS 2402-58-6) with the shortest fatty alcohol side chain, which is regarded as worst-case approach. Therefore, based on the study results with Didodecyl fumarate (CAS 2402-58-6) none of the category members of the PFAE fumarate group is considered to be skin irritating.
In conclusion, the eye irritating properties of the PFAE fumarate category members have been investigated in a reliable in-vitro study indicating no eye irritating properties. As eye irritating properties are expected to decrease with increasing fatty alcohol chain length, Didodecyl fumarate (CAS 2402-58-6) the category member with the shortest fatty alcohol side chain, therefore representing a worst case, was used for testing. Therefore, based on the study results with Didodecyl fumarate (CAS 2402-58-6) none of the category members of the PFAE fumarate group is considered to be eye irritating.
A detailed reference list is provided in the technical dossier and within CSR. The justification for read-across is also given in section 13 of IUCLID.
Justification for classification or non-classification
According to Article 13 of Regulation (EC) No. 1907/2006 "General Requirements for Generation of Information on Intrinsic Properties of substances", information on intrinsic properties of substances may be generated by means other than tests e.g. from information from structurally related substances (grouping or read-across), provided that conditions set out in Annex XI are met. Annex XI, "General rules for adaptation of this standard testing regime set out in Annexes VII to X” states that “substances whose physicochemical, toxicological and ecotoxicological properties are likely to be similar or follow a regular pattern as a result of structural similarity may be considered as a group, or ‘category’ of substances. This avoids the need to test every substance for every endpoint". Since the group concept is applied to the members of the PFAE fumarate category, data will be generated from representative reference substance(s) within the category to avoid unnecessary animal testing. Additionally, once the group concept is applied, substances will be classified and labeled on this basis.
Therefore, based on the group concept, all available data on skin and eye irritation / corrosion do not meet the classification criteria according to Regulation (EC) 1272/2008, and the substance is therefore not classified as a skin nor as an eye irritant.
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