N-{[1,1'-Biphenyl]-2-yl}-N-(9,9-dimethyl-9H-fluoren-2-yl)-7'-phenyl-9,9'-spirobi[fluoren]-7-amine

Endpoint summary

Description of key information

The test material was investigated for skin and eye irritation in in vitro methods. The GLP compliant studies were fully compliant with OECD TG 439, 437, and 492.

The follwing results have been obtained:

Skin irritation in vitro: OECD 439: negative

Eye irritation in viitro: OECD 437: inconclusive; OECD 492: negative

Key value for chemical safety assessment

Skin irritation / corrosion

Link to relevant study records

Reference

Endpoint:

skin irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Nov 14 - Dec 11, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)

Version / remarks:

July 26, 2013

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: Council Regulation (EC) No. 440/2008 laying down test methods pursuant to Regulation (EC) No. 1907/2006. B.40.bis. In vitro skin corrosion: human skin model test

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test system:

human skin model

Source species:

human

Cell type:

non-transformed keratinocytes

Cell source:

foreskin from a single donor

Justification for test system used:

standard model

Vehicle:

unchanged (no vehicle)

Remarks:

No vehicle used in this study; The test item was applied neat to the tissues.

Details on test system:

CELL CULTURE
- Supplier: EpiSkin/SkinEthic Laboratories, Lyon, France)
- Source: human keratinocytes cultured on a polycarbonate filter in conditions which permit their terminal differentiation
- Format: 24 well plate
- Batch: 18-RHE-135
- Expires: Nov 26, 2018

TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment: room temperature
- Temperature of post-treatment incubation: 37°C

REMOVAL OF THE TEST MATERIAL AND CONTROL
At the end of the exposure periods, the test item, positive and negative control was removed immediately by gently rinsing with a minimum volume of 20 mL DPBS using a pipette. Excess DPBS was removed by gently shaking the tissue inserts and blotting the bottom of the tissue inserts with blotting paper.

Control samples:

yes, concurrent negative control

Amount/concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 16 mg ± 2 mg of solid test material
- Concentration (if solution): n/a

VEHICLE
- Amount(s) applied (volume or weight with unit): n/a
- Concentration (if solution): n/a
- Lot/batch no. (if required): n/a
- Purity: n/a

NEGATIVE CONTROL
- Amount(s) applied (volume or weight): 16 µL ± 0.5 µl (deionised water )
- Concentration (if solution): n/a

POSITIVE CONTROL
- Amount(s) applied (volume or weight): 16 µL ± 0.5 µl
- Concentration (if solution): A dodecyl sulfate sodium salt solution dissolved deionised water pure was used as positive control.

Duration of treatment / exposure:

42 min

Number of replicates:

3

Controls:

yes, concurrent negative control

Amount / concentration applied:

16 mg

Duration of treatment / exposure:

42 min

Irritation / corrosion parameter:

% tissue viability

Run / experiment:

Mean relative viability in %

Value:

91.3

Vehicle controls validity:

not applicable

Remarks:

The test item was applied neat to the tissues

Negative controls validity:

valid

Positive controls validity:

valid

Remarks on result:

no indication of irritation

Other effects / acceptance of results:

OTHER EFFECTS:
- Visible damage on test system: none
- Direct-MTT reduction: none
- Colour interference with MTT: none

ACCEPTANCE OF RESULTS:


-Acceptability of the Quality Control Data of the Skin Model with Reference to Historical Batch Data:
The negative control OD values were 1.749, 1.681 and 1.853 and, thus, in the range of ≥0.8 and ≤3.0

-Acceptability of the Positive and Negative Control:
After treatment with the negative control (DPBS-buffer) the mean OD was 1.761 (standard deviation: 4.9%) and, thus, higher than the historically established boundary of 1.424.
After treatment with the positive control (5% aqueous solution of sodium dodecyl sulfate) the mean viability value was 1.30% (standard deviation: 7.7%) and, thus, lower than the historically established boundary of 2.82%.
The standard deviation of the negative control and the positive control was ≤18%, respectively.


-Test Substance Data Acceptance Criteria:
The standard deviation of the three tissues treated with the test item was 6.7% and, thus, ≤18%.
Therefore, the study fulfilled the validity criteria.

Group	Time / [min]	Mean OD	Mean Relative viability / [%]
Negative Control	42	1.761	100.00
Positive Control	42	0.022	1.30
Test Material	42	1.608	91.30

Interpretation of results:

GHS criteria not met

Remarks:

Non-corrosive

Conclusions:

This study was performed according to GLP and the methods applied are fully compliant with OECD TG 439. Under the conditions of the present study, the test item is not considered to be irritant to skin.

Executive summary:

This study was performed according to GLP and the methods applied are fully compliant with OECD TG 439.Under the conditions of the present study, the test item is not considered to be irritant to skin.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not irritating)

Eye irritation

Link to relevant study records

Reference

Reference 1

Endpoint:

eye irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

Nov 01 - Dec 11, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 437 (Bovine Corneal Opacity and Permeability Test Method for Identifying i) Chemicals Inducing Serious Eye Damage and ii) Chemicals Not Requiring Classification for Eye Irritation or Serious Eye Damage)

Version / remarks:

2017

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU method B.47 (Bovine corneal opacity and permeability test method for identifying ocular corrosives and severe irritants)

Version / remarks:

Commission Regulation (EU) 2017/735 of 14 February 2017 amending, for the purpose of its adaption to technical progress, the Annex to Regulation (EC) No 440/2008 laying down test methods pursuant to Regulation (EC) No 1907/2006 of the European Parliament and the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH).

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

PREPARATION OF THE TEST MATERIAL
The test item was prepared as a 20% (w/v) solution in a 0.9% sodium chloride solution. The stability in the vehicle was not investigated. The test item preparation was administered within <1 hour after preparation.

Vehicle:

physiological saline

Controls:

yes, concurrent vehicle

yes, concurrent positive control

Amount / concentration applied:

TEST MATERIAL: 750 µL (i.e. 150mg/750µL)

NEGATIVE / VEHICLE CONTROL: 750 µL

Designation: 0.9% sodium chloride solution
Supplier: B. Braun Melsungen AG, Germany
Batch: 17361013
Storage: 2 to 8°C
Released until: August 2020


POSITIVE CONTROL: 750 µL

Designation: Art. 814223
Synonym: Imidazole
Supplier: Merck KGaA, Germany
Batch: S5798623
Purity (GC) 99.8% (a/a)
Storage: At room temperature
Released until: April 30, 2023

Imidazole was dissolved with 0.9% sodium chloride solution to a concentration of 20% (w/v).

Duration of treatment / exposure:

240 minutes

Number of animals or in vitro replicates:

in vitro: triplicate design

Irritation parameter:

in vitro irritation score

Run / experiment:

Run 1 / Experiment 1

Value:

5.8

Vehicle controls validity:

valid

Negative controls validity:

valid

Positive controls validity:

valid

Remarks on result:

not determinable

Remarks:

According to OECD 437 no prediction can be made regarding the eye hazard potential of the test item.

Other effects / acceptance of results:

ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: After treatment with the negative control (0.9% sodium chloride solution) the calculated IVIS was 0.1 and, thus, within three standard deviations of the current historical mean of the negative control (IVIS: -1.4 – 3.1).
- Acceptance criteria met for positive control: After treatment with the positive control (20% Imidazole) the calculated IVIS was 117.0 and, thus, also within two standard deviations of the current historical mean of the positive control (IVIS: 82.3 – 132.4).

Therefore, the study fulfilled the acceptance criteria.

Results

The IVIS obtained after treatment with the test material was 5.8 and, thus higher than 3 and lower than 55, i.e. according to OECD 437 no prediction can be made regarding the eye hazard potential of the test item.

The results are given in the following table:

		Opacity	Permeability	IVIS
				per cornea	per group (mean value)	Standard deviation
Negative control	0.9% sodium chloride solution	0.0	-0.001	-0.015	0.1	0.4
		0.6	-0.003	0.555
		-0.1	-0.002	-0.130
Positive control	Imidazole (20%)	68.44	1.928	97.320	117.0	17.1
		86.2	2.630	125.650
		70.4	3.846	128.090
Test item	Test material preparation	4.6	-0.001	4.585	5.8	4.4
		2.1	-0.002	2.070
		10.7	-0.001	10.685

No observations (e.g. tissue peeling, residual test chemical, non-uniform opacity patterns) were seen in a visually inspection of the corneas after treatment.

Study Acceptance Criteria

After treatment with the negative control (0.9% sodium chloride solution) the calculated IVIS was 0.1 and, thus, within three standard deviations of the current historical mean of the negative control (IVIS: -1.4 – 3.1). After treatment with the positive control (20% Imidazole) the calculated IVIS was 117.0 and, thus, also within two standard deviations of the current historical mean of the positive control (IVIS: 82.3 – 132.4). Therefore, the study fulfilled the acceptance criteria.
The resulting classification of the test item in this study is unequivocal and no borderline results were obtained. Therefore, a single testing run composed of three corneas per group was considered sufficient.

Interpretation of results:

study cannot be used for classification

Conclusions:

Under the conditions of the present study, the eye hazard potential of the test item cannot be predicted.

Executive summary:

This study was performed according to GLP and the methods applied are fully compliant with OECD TG 437. Under the conditions of the present study, the eye hazard potential of the test item cannot be predicted.

Reference 2

Endpoint:

eye irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

Dec 05, 2018 - Feb 25, 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 492 (Reconstructed Human Cornea-like Epithelium (RhCE) Test Method for Identifying Chemicals Not Requiring Classification and Labelling for Eye Irritation or Serious Eye Damage)

Version / remarks:

October 9, 2017

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: DB-ALM Protocol No. 164: Ocular Irritation Assay for Chemicals using EpiOcular™ EIT,

Version / remarks:

September 14, 2015

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: EpiOcular Eye Irritation Test (OCL-200-EIT) for the prediction of acute ocular irritation of chemicals; For use with MatTek Corporation`s Reconstructed Human EpiOcular Model; MatTek Corporation

Version / remarks:

June 29, 2015

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: No pre-treatment, the test item was applied neat to the tissues.

Vehicle:

unchanged (no vehicle)

Controls:

yes, concurrent positive control

yes, concurrent negative control

Amount / concentration applied:

TEST MATERIAL: 50 mg per tissue

NEGATIVE / VEHICLE CONTROL: 50 µL per tissue

Sterile deionized water was used as negative control.


POSITIVE CONTROL: 50 µL per tissue

Designation: Art. 8.09711
Synonym: Methyl acetate
Supplier: Merck KGaA
CAS No.: 79-20-9
Batch No.: S7451611
Appearance: Liquid
Assay (GC, area%): 99.6 % (a/a)
Minimum shelf life: June 30, 2022
Storage conditions: Tightly closed, dark, at room temperature (15 – 25°C)

Duration of treatment / exposure:

6 hours

Duration of post- treatment incubation (in vitro):

18 hours

Number of animals or in vitro replicates:

in vitro: duplicate design

Irritation parameter:

other: Viability %

Run / experiment:

Run 1 / Experiment 1

Value:

106.3

Vehicle controls validity:

not applicable

Negative controls validity:

valid

Positive controls validity:

valid

Remarks on result:

no indication of irritation

Other effects / acceptance of results:

OTHER EFFECTS:
- Visible damage on test system: No observations

ACCEPTANCE OF RESULTS:
1. The negative control OD is >0.8 and <2.5 (2.187 and 1.840).
2. The mean relative viability of the positive control is below 50% of the negative control viability (29.7%).
3. The difference of viability between the two relating tissues of a single chemical is <20% (values between 1.6% to 17.2%) in the same run (for positive and negative control tissues and tissues of single chemicals).

The study met all acceptance criteria

	Mean OD	Mean Viability
Negative Control	2.014	100.0%
Positive Control	0.599	29.7%
Test Item	2.140	106.3%

Interpretation of results:

GHS criteria not met

Conclusions:

Under the conditions of the present study, the test item did not show an eye hazard potential. The test item is identified as not requiring classification and labeling according to UN GHS (No Category).

Executive summary:

This study was performed according to GLP and the methods applied are fully compliant with OECD TG 492. Under the conditions of the present study, the test item did not show an eye hazard potential. The test item  is identified as not requiring classification and labeling according to UN GHS (No Category).

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion

Endpoint conclusion:

no study available

Justification for classification or non-classification

The information provided shows that the test material does not need to classified for skin or eye irritation according to the EU Regulation (EC) No 1272/2008 on Classification, Labelling and Packaging of Substances and Mixtures.