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EC number: 226-122-6 | CAS number: 5285-60-9
- 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 irritation / corrosion
Administrative data
- Endpoint:
- skin corrosion: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 13 February 2018 - 23 February 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 431 (In Vitro Skin Corrosion: Reconstructed Human Epidermis (RHE) Test Method)
- Version / remarks:
- 29 July 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: EU method B.40 BIS (In Vitro Skin corrosion: Human Skin Model Test).
- Version / remarks:
- 31 May 2008
- Deviations:
- no
- GLP compliance:
- yes
Test material
- Reference substance name:
- 4,4'-methylenebis[N-sec-butylaniline]
- EC Number:
- 226-122-6
- EC Name:
- 4,4'-methylenebis[N-sec-butylaniline]
- Cas Number:
- 5285-60-9
- Molecular formula:
- C21H30N2
- IUPAC Name:
- 4,4'-methylenebis[N-sec-butylaniline]
- Test material form:
- liquid
- Details on test material:
- Appearance: Slight yellow liquid
Storage conditions: At room temperature protected from light
Constituent 1
In vitro test system
- Test system:
- human skin model
- Source species:
- human
- Cell type:
- non-transformed keratinocytes
- Cell source:
- skin obtained from plastic surgery from multiple donors
- Details on animal used as source of test system:
- EpiDerm™ Reconstructed Human Epidermis (Lot no.: 27958, kit F and G,)
- All cells used to produce Epiderm™ are purchased or derived from tissue obtained by MatTek Corporation from acredited institutions.
- Cells are screened for potential biological contaminants (HIV-1, Hepatitis B, Hepatitis C, bacteria, yeast and fungi) - Justification for test system used:
- Recommended test system in international guidelines (OECD and EC).
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
- RECONSTRUCTED HUMAN EPIDERMIS (RHE) TISSUE
- Model used: EpiDerm Skin Model (EPI-200)
- Tissue lot number: 27958, kit F and G
- Surface: 0.6 cm^2
- The model consists of keratinocytes which have been cultured to form a multilayered, highly differentiated model of the human epidermis.
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment / exposure: All incubations, with the exception of the test item incubation of 3 minutes at room temperature, were carried out in a controlled environment at 37.0 ± 1.0°C. (actual range 35.0 - 37.3°C)
REMOVAL OF TEST MATERIAL AND CONTROLS
- After the exposure period, the tissues were washed with phosphate buffered saline to remove residual test item.
MTT DYE USED TO MEASURE TISSUE VIABILITY AFTER TREATMENT / EXPOSURE
- MTT concentration: 1 mg/mL
- Incubation time: 3 h
- Spectrophotometer: TECAN Infinite® M200 Pro Plate Reader
- Wavelength: 570 nm
NUMBER OF REPLICATE TISSUES: 2 replicates per exposure duration, one negative control, one positive contol.
ACCEPTANCE OF RESULTS:
The in vitro skin corrosion test is considered acceptable if it meets the following criteria:
a) The absolute mean OD570 of the two tissues of the negative control should reasonably be within the laboratory historical control data range.
b) The mean relative tissue viability following 1-hour exposure to the positive control should be <15 %.
c) In the range 20 - 100% viability, the Coefficient of Variation (CV) between tissue replicates should be ≤ 30%.
DECISION CRITERIA
A test item is considered corrosive in the skin corrosion test if:
a) The relative mean tissue viability obtained after 3-minute treatment compared to the negative control tissues is decreased below 50%.
b) In addition, a test item considered non-corrosive (viability ≥ 50%) after the 3-minute treatment is considered corrosive if the relative tissue viability after 1-hour treatment with the test item is decreased below 15%.
A test item is considered non corrosive in the in vitro skin corrosion test if:
a) The relative mean tissue viability obtained after the 3-minute treatment compared to the negative control tissues is not decreased below 50%.
b) In addition, the relative tissue viability after the 1-hour treatment is not decreased below 15%.
DATA INTERPRETATION
See Table 1 (Any other information on methods inc. tables) - Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- yes, concurrent MTT non-specific colour control
- other: concurrent control for MTT reduction by test item
- Amount/concentration applied:
- 50 μL of the undiluted test item was applied on top of the skin tissues.
- Duration of treatment / exposure:
- 3-minute and 1-hour
- Number of replicates:
- 2 replicates per exposure duration (4 total), one negative control, one positive contol.
Results and discussion
In vitro
Resultsopen allclose all
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- 3-minute exposure
- Value:
- 104
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Remarks:
- 100%
- Positive controls validity:
- valid
- Remarks:
- 9.1%
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- 1-hour exposure
- Value:
- 91
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Remarks:
- 100%
- Positive controls validity:
- valid
- Remarks:
- 7.9%
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Direct-MTT reduction: No
- Colour interference with MTT: No
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: Yes
- Acceptance criteria met for positive control: Yes, mean relative tissue viability following 1-hour exposure was 7.9%.
- Acceptance criteria met for variability between replicate measurements: Yes
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The in vitro skin corrosion test was conducted according to OECD 431 guideline and GLP principles. It is concluded that this test is valid and that the test substance is not corrosive in the in vitro skin corrosion test under the experimental conditions described in this report.
- Executive summary:
In an in vitro skin corrosion test using a human skin model ( EpiDerm Skin Model) performed according to OECD 431 and GLP principles, the influence of the test substance on the viability of human skin was tested. 50 μL test substance was applied directly on top of 0.6 cm2 cultured skin. After 3-minute and 1-hour treatments the substance was removed and the viability of the cells was tested by reduction of MTT. Viability of unexposed skin was set at 100%. The relative mean tissue viability obtained after 3-minute and 1-hour treatments with test item compared to the negative control tissues was 104% and 91%, respectively. The positive control had a mean cell viability of 7.9% after 1 hour exposure and no color interference or direct reduction by MTT was observed in the test system. Since the mean relative tissue viability was not below 50% after the 3-minute treatment and not below 15% after the 1-hour treatment, it can be concluded that the test item is not corrosive in the in vitro skin corrosion test.
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