Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 271-708-7 | CAS number: 68604-99-9
- 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
Skin sensitisation
Administrative data
- Endpoint:
- skin sensitisation, other
- Remarks:
- expert report
- Type of information:
- other: expert report
- Adequacy of study:
- supporting study
- Study period:
- 01 July 2017 - 06 July 2017
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- other:
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
- GLP compliance:
- no
- Type of study:
- other:
Test material
- Reference substance name:
- 9-(dimethoxyphosphoryl)octadecanoic acid 10-(dimethoxyphosphoryl)octadecanoic acid
- Molecular formula:
- C20H41O5P
- IUPAC Name:
- 9-(dimethoxyphosphoryl)octadecanoic acid 10-(dimethoxyphosphoryl)octadecanoic acid
- Reference substance name:
- 9,12-bis(dimethoxyphosphoryl)octadecanoic acid 9,13-bis(dimethoxyphosphoryl)octadecanoic acid 10,12-bis(dimethoxyphosphoryl)octadecanoic acid 10,13-bis(dimethoxyphosphoryl)octadecanoic acid
- Molecular formula:
- C22H46O8P2
- IUPAC Name:
- 9,12-bis(dimethoxyphosphoryl)octadecanoic acid 9,13-bis(dimethoxyphosphoryl)octadecanoic acid 10,12-bis(dimethoxyphosphoryl)octadecanoic acid 10,13-bis(dimethoxyphosphoryl)octadecanoic acid
- Reference substance name:
- Oleic acid
- EC Number:
- 204-007-1
- EC Name:
- Oleic acid
- Cas Number:
- 112-80-1
- Molecular formula:
- C18H34O2
- IUPAC Name:
- octadec-9-enoic acid
- Reference substance name:
- Linoleic acid
- EC Number:
- 200-470-9
- EC Name:
- Linoleic acid
- Cas Number:
- 60-33-3
- Molecular formula:
- C18H32O2
- IUPAC Name:
- octadeca-9,12-dienoic acid
- Reference substance name:
- Dimethyl (2-oxopropyl)phosphonate
- EC Number:
- 224-110-5
- EC Name:
- Dimethyl (2-oxopropyl)phosphonate
- Cas Number:
- 4202-14-6
- Molecular formula:
- C5H11O4P
- IUPAC Name:
- dimethyl (2-oxopropyl)phosphonate
- Reference substance name:
- Dimethyl propylphosphonate
- EC Number:
- 242-555-3
- EC Name:
- Dimethyl propylphosphonate
- Cas Number:
- 18755-43-6
- Molecular formula:
- C5H13O3P
- IUPAC Name:
- dimethyl propylphosphonate
- Reference substance name:
- Dimethyl methylphosphonate
- EC Number:
- 212-052-3
- EC Name:
- Dimethyl methylphosphonate
- Cas Number:
- 756-79-6
- Molecular formula:
- C3H9O3P
- IUPAC Name:
- dimethyl methylphosphonate
- Test material form:
- liquid
Constituent 1
Constituent 2
Constituent 3
Constituent 4
Constituent 5
Constituent 6
Constituent 7
- Specific details on test material used for the study:
- Identification: Fatty acids, C18-unsatd., phosphates.
Appearance: Yellow liquid
Batch: 0101891886
Purity/Composition: 100% UVCB
Test item storage: At room temperature
Stable under storage conditions until: 02 November 2017 (retest date)
Test Facility test item number: 208073/A
Chemical name (IUPAC, synonym or trade name: Phosphorylated fatty acid
CAS number: 68604-99-9
pH (1% in water, indicative range): 2.28 – 2.21 (determined by Charles RiverDen Bosch)
Specific gravity / density: 1.04
Results and discussion
Any other information on results incl. tables
A valid KeratinoSensTM assay was performed according to OECD 442D and GLP (Westerink, 2017). For the KeratinoSensTM assay Fatty acids, C18-unsatd., phosphates was dissolved in DMSO to a final concentration of 40 mg/mL. The 100-fold dilution in DMEM of 40 mg/mL formed a non-homogeneous solution and was therefore not suitable to test. The 100-fold dilution of the 20 mg/mL DMSO stock formed a homogeneous solution (slight precipitation). This concentration was selected as highest concentration for the assays. No precipitate was observed in the assays at the start or end of the treatment period. Due to toxicity, the test concentrations used for the second experiment were in the range of0.008 – 15.63 μM.
Three independent experiments were performed. The test item showed toxicity with an IC30 of 73.7 μg/mL and an IC50 of 107.8 μg/mL in experiment 1, an IC30 of 69.8 μg/mL and IC50 value of 79.1 μg/mL in experiment 2, and an IC30 of 41.0 μg/mL and IC50 value of 54.1 μg/mL in experiment 3. In the first experiment, no induction of the luciferase activity (no EC1.5 value) was measured. The maximum luciferase activity induction (Imax) was 1.26 -fold.
In the second experiment, a statistically significant induction of the luciferase activity (EC1.5 value 26.7 μg/mL; p<0.001 Student’s t test) was measured. The maximum luciferase activity
induction (Imax) was 4.01-fold at 50 μg/mL. The test item induced the luciferase activity very close to cytotoxic dose levels. Therefore, the test item was retested with more narrow doseresponse
analysis using a lower dilution factor (1.25 fold dilution between wells), to determine if induction has occurred at cytotoxic levels or not.
In the third experiment, a statistically significant induction of the luciferase activity (EC1.5 value 38.5 μg/mL; p<0.001 Student’s t test) was measured. The luciferase activity inductions were 1.70- and 1.90 fold at 41.9 μg/mL and 52.4 μg/mL, respectively. However, these inductions are observed at cytotoxic dose levels with a cellular viability < 70% (69.6% and 55.0% at 41.9 μg/mL and 52.4 μg/mL, respectively). Therefore, no real positive effect was measured at any of the tested concentrations. Based on the EC1.5 (38.5 μg/mL) and IC30 (41.0 μg/mL) values, the test item is positive in the KeratinoSensTM assay, although the values are very close together.
Overall, the results of the third experiment are not clearly positive or negative and therefore inconclusive. Three experiments were performed all with different conclusions. Due to the fact that induction of the luciferase activity was very close to the cytotoxic levels, it is not possible to make a final conclusion.
Applicant's summary and conclusion
- Conclusions:
- Fatty acids, C18-unsatd., phosphates was inconclusive in the KeratinoSensTM assay and no conclusion can be drawn from an alternative testing strategy for skin sensitization. Therefore, Fatty acids, C18-unsatd., phosphates was tested in vivo to determine skin sensitization potential. The guinea pig Maximization test was selected since the test item is a fatty acid and the Local Lymph Node Assay as preferred alternative has shown to provide false positive results for fatty acids (Reference 1).
Ref 1. Comparison of the skin sensitizing potential of unsaturated compounds as assessed by the murine local lymph node assay (LLNA) and the guinea pig maximization test (GPMT), Food and chemical Toxicology 46 (2008) 1896–1904 - Executive summary:
The objective of this study was to reach an overall conclusion on the endpoint skin sensitization based on the available relevant information, including alternative testing strategy data.
As Fatty acids, C18-unsatd., phosphates is a UVCB, a KeratinoSensTM assay was performed in accordance with the strategy presented in ECHA Guidance on information requirements and chemical safety assessment Chapter R.7a. Since the KeratinoSensTM assay was inconclusive, an in vitro test for key event 3 does not need to be performed, as one in vitro test with a clear negative or positive outcome is not sufficient to decide on skin sensitization of Fatty acids, C18-unsatd., phosphates. Moreover, in vitro testing does not give an indication of skin sensitization potential. In the absence of a reliable and acceptable in vitro test for determination of skin sensitising potential, the potency needs to be determined by means of an in vivo test.
Based on the above, no conclusion can be drawn based on the alternative strategy for skin sensitization of Fatty acids, C18 -unsatd., phosphates and the test item will be tested in vivo.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.