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EC number: 247-530-0 | CAS number: 26239-55-4
- 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 irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2016-06-29 to 2016-07-01
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)
- Version / remarks:
- 28 July 2015
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.46 (In Vitro Skin Irritation: Reconstructed Human Epidermis Model Test)
- Version / remarks:
- 06 July 2012
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- N-carbamoylmethyliminodi(acetic acid)
- EC Number:
- 247-530-0
- EC Name:
- N-carbamoylmethyliminodi(acetic acid)
- Cas Number:
- 26239-55-4
- Molecular formula:
- C6H10N2O5
- IUPAC Name:
- 2,2'-[(2-amino-2-oxoethyl)imino]diacetic acid
- Test material form:
- liquid
Constituent 1
In vitro test system
- Test system:
- human skin model
- Source species:
- human
- Cell type:
- non-transformed keratinocytes
- Cell source:
- other: Adult donors, not further detailed.
- Justification for test system used:
- The EPISKIN model has been validated for irritation testing in an international trial. After a review of scientific reports and peer reviewed publications on the EPISKIN method, it showed evidence of being a reliable and relevant stand-alone test for predicting rabbit skin irritation, when the endpoint is evaluated by MTT reduction and for being used as a replacement for the Draize Skin Irritation test (OECD TG 404 and Method B.4 of Annex V to Directive 67/548/EEC) for the purposes of distinguishing between skin irritating and no- skin irritating test substances (STATEMENT OF VALIDITY OF IN-VITRO TESTS FOR SKIN IRRITATION; ECVAM; Institute for Health & Consumer Protection; Joint Research Centre; European Commission; Ispra; 27 April 2007).
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
- RECONSTRUCTED HUMAN EPIDERMIS (RHE) TISSUE
- Model used: EpiSkinTM Small Model (EpiSkinTM SM), manufactured by EPISKIN SNC Lyon, France
- Tissue batch number: 16-EKIN-026
- Production date: not specified
- Shipping date: not specified
- Delivery date: not specified
- Expiry date: 04 July 2016
- Date of initiation of testing: 2016-06-29
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment / exposure: room temperature
- Temperature of post-treatment incubation: 37 °C
REMOVAL OF TEST MATERIAL AND CONTROLS
-Volume and number of washing steps: 1 step using 25 mL PBS 1x solution
- Observable damage in the tissue due to washing: no
- Modifications to validated SOP: no
MTT DYE USED TO MEASURE TISSUE VIABILITY AFTER TREATMENT / EXPOSURE
- MTT concentration: 2 mL of 0.3 mg/mL MTT per well
- Incubation time: 3 hours (± 5 min)
- Spectrophotometer: 96-well plate spectrophotometer
- Wavelength: 570 nm
- Filter: not specified
- Filter bandwidth: not specified
- Linear OD range of spectrophotometer: not specified
FUNCTIONAL MODEL CONDITIONS WITH REFERENCE TO HISTORICAL DATA
- Histology scoring: Historical control value: >= 19.5, 22.7 +/- 0.5 for batch used
- IC50: Historical control value: 1.5 mg/mL <= IC50 <= 3 mg/mL, 2.6 mg/mL for batch used
- Morphology: Well-differentiated epidermis consisting of a basal layer, several spnous and granular layers and a thick stratum corneum was satisfactory in the batch used.
- Contamination: Blood of donor: absence of HIV 1+2, hepatitis C anitbodies and hepatitis B antigen HB; epidermal cells of donor: absence of bacteria, fungus and mycoplasma
NUMBER OF REPLICATE TISSUES: 3
CONTROL TISSUES USED IN CASE OF MTT DIRECT INTERFERENCE
The test material did not interact with the MTT, therefore additional controls and data calculations were not necessary.
NUMBER OF INDEPENDENT TEST SEQUENCES / EXPERIMENTS TO DERIVE FINAL PREDICTION: 1
PREDICTION MODEL / DECISION CRITERIA (choose relevant statement)
- The test substance is considered to be corrosive or irritating to skin if the viability after exposure is <= 50 %.
- The test substance is considered to be non-corrosive to skin if the viability after exposure is greater than 50 %. - Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- Amount/concentration applied:
- TEST MATERIAL
- Amount applied: 10 mg (to moistened skin)
NEGATIVE CONTROL
- Amount applied: 10 µL
POSITIVE CONTROL
- Amount applied: 10 µL
- Concentration: 5 % aq. - Duration of treatment / exposure:
- 15 minutes (± 0.5 min)
- Duration of post-treatment incubation (if applicable):
- 42 hours (± 1h)
- Number of replicates:
- 3
Results and discussion
In vitro
Results
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- 1
- Value:
- 91
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Remarks:
- 100 %
- Positive controls validity:
- valid
- Remarks:
- 18 %
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Visible damage on test system: none
- Direct-MTT reduction: no
- Colour interference with MTT: no
DEMONSTRATION OF TECHNICAL PROFICIENCY: Prior to routine use of the method the laboratory demonstrated the technical proficiency in a separate study using the ten Proficiency Chemicals according to OECD Test Guideline No. 439.
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: YES (mean OD of 0.762 in the range from 0.6 to 1.5; SD of 10.23 < 18)
- Acceptance criteria met for positive control: YES (mean viability of 18 % in the range from 0 to 40 %; SD of 7.55 < 18)
- Acceptance criteria met for variability between replicate measurements: YES (test substance: SD of 7.11 < 18)
- Range of historical values if different from the ones specified in the test guideline: no
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The test item is considered to be non-irritant to skin.
- Executive summary:
An EpiSkinTM SM test with the test item has been performed to predict its irritation potential by measurement of its cytotoxic effect, as reflected in the MTT assay, according to the OECD Test Guideline No. 439, 28 July 2015. Triplicates of the human skin model EPISKIN (Reconstructed Human Epidermis, SkinEthic Laboratories) were treated with test item and incubated for 15 minutes at room temperature. Exposure of the reconstructed human epidermis skin units with test item was terminated by rinsing with PBS 1x solution. Epidermis units were then incubated at 37 °C for 42 hours in an incubator with 5 % CO2. The viability of each disk was assessed by incubating the tissues for 3 hours with MTT solution at 37 °C in 5 % CO2 protected from light. The precipitated formazan was then extracted using acidified isopropanol and quantified spectrophotometrically. SDS (5 % aq.) and 1×PBS treated epidermis (three units / positive and negative control) were used as positive and negative controls respectively. For each treated tissue viability was expressed as a percentage relative to negative control. In this in vitro skin irritation test using the EPISKIN model, the test item did not show significantly reduced cell viability in comparison to the negative control (mean value: 91 %). All obtained test item viability results were far above 50 % when compared to the viability values obtained from the negative control. Therefore the test item was considered to be non-irritant to skin. Positive and negative controls showed the expected cell viability values within acceptable limits. The experiment was considered to be valid. The results obtained from this in vitro skin irritation test, using the EPISKIN model, indicated that the test item reveals no skin irritation potential under the utilised testing conditions. The test item is considered to be non-irritant to skin.
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