2,9-bis(2-phenylethyl)anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone

Endpoint summary

Description of key information

Skin irritation/corrosion: slightly irritating, similar to OECD TG 404, non-GLP, 0.5 g test substance, occlusive, 24 h, rabbit
Eye irritation: not irritating, similar to OECD TG 405, non-GLP, 0.1 ml test substance, rabbit

Key value for chemical safety assessment

Skin irritation / corrosion

Link to relevant study records

Reference

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: Code of Federal Regulations, Title 16, Section 1500.42

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

GLP compliance:

no

Specific details on test material used for the study:

- Physical state: solid

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: W. Ostrop/Meerbusch
- Weight at study initiation: mean weight: 2.1 kg
- Housing: one per cage
- Diet (e.g. ad libitum): "muemmel z" (ssniff/Soest)
- Water (e.g. ad libitum): water ad libitum
- Acclimation period: 4-6 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 16 - 18
- Humidity (%): 40 (relative humidity)
- Photoperiod (hrs dark / hrs light): according to the day light rhythm

Type of coverage:

occlusive

Preparation of test site:

other: shaved intact and damaged skin

Vehicle:

water

Controls:

no

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 500 mg compound slightly thickened with water

Duration of treatment / exposure:

24 hours

Observation period:

8 days

Number of animals:

6

Details on study design:

TEST SITE
- Area of exposure: 2.5 x 2.5 cm
- Type of wrap if used: double layer gauze covered by indifferent impermeable PVC (5x5 cm) foil and elastic bandage (ElastoflexR)

REMOVAL OF TEST SUBSTANCE
- Washing (if done): no

SCORING SYSTEM: Draize numerical scores.

Irritation parameter:

erythema score

Remarks:

intact and damaged skin

Basis:

mean

Time point:

24 h

Remarks on result:

other: scoring not possible due to the skin coloring by the substance

Irritation parameter:

erythema score

Remarks:

intact and damaged skin

Basis:

mean

Time point:

48 h

Remarks on result:

other: timepoint not evaluated

Irritation parameter:

erythema score

Remarks:

intact and damaged skin

Basis:

mean

Time point:

72 h

Remarks on result:

other: scoring not possible due to the skin coloring by the substance

Irritation parameter:

erythema score

Remarks:

intact and damaged skin

Basis:

mean

Time point:

other: 8 days

Remarks on result:

other: scoring not possible due to the skin coloring by the substance

Irritation parameter:

edema score

Remarks:

intact skin

Basis:

mean

Time point:

24 h

Score:

2.33

Max. score:

4

Reversibility:

not fully reversible within: 8 days

Irritation parameter:

edema score

Remarks:

intact skin

Basis:

mean

Time point:

48 h

Remarks on result:

other: timepoint not evaluated

Irritation parameter:

edema score

Remarks:

intact skin

Basis:

mean

Time point:

72 h

Score:

0.83

Max. score:

4

Reversibility:

not fully reversible within: 8 days

Irritation parameter:

edema score

Remarks:

intact skin

Basis:

mean

Time point:

other: 8 days

Score:

0.33

Max. score:

4

Reversibility:

not fully reversible within: 8 days

Irritation parameter:

edema score

Remarks:

damaged skin

Basis:

mean

Time point:

24 h

Score:

1.83

Max. score:

4

Reversibility:

not fully reversible within: 8 days

Irritation parameter:

edema score

Remarks:

damaged skin

Basis:

mean

Time point:

48 h

Remarks on result:

other: time point not evaluated

Irritation parameter:

edema score

Remarks:

damaged skin

Basis:

mean

Time point:

72 h

Score:

1.17

Max. score:

4

Reversibility:

not fully reversible within: 8 days

Irritation parameter:

edema score

Remarks:

damaged skin

Basis:

mean

Time point:

other: 8 days

Score:

0.33

Max. score:

4

Reversibility:

not fully reversible within: 8 days

Irritant / corrosive response data:

The test article caused edema formation below the threshold of regulatory significance. In two animals, the edema was not fully reversed after 8 days but is expected to have cleared after 14 days. The erythema reactions could not be scored due to coloring effects of the test substance. Erythema was assumed to be equal to edema based on the correlation existing (Marzulli and Maibach, Foi. Cosm. Tox. 13, 355, 1975).

Overview of results:

		Animal 1	Animal 2	Animal 3	Animal 4	Animal 5	Animal 6
		intact skin
erythema	24 h	*	*	*	*	*	*
	72 h	*	*	*	*	*	*
	8 days	*	*	*	*	*	*
edema	24 h	3	3	1	2	3	2
	72 h	0	1	1	1	1	1
	8 days	0	0	0	1	1	0
		damaged skin
erythema	24 h	*	*	*	*	*	*
	72 h	*	*	*	*	*	*
	8 days	*	*	*	*	*	*
edema	24 h	2	2	0	2	3	2
	72 h	1	0	0	2	2	2
	8 days	1	0	0	0	1	0

* could not be scored due to coloration of the skin from the substance

Interpretation of results:

GHS criteria not met

Conclusions:

The results show that there is no corrosive potential of the substance. However, the substance can not be properly evaluated due to substance residues / coloring. The substance is regarded as slightly irritating, however below the level of regulatory significance.

Executive summary:

The test substance slightly thickened with water (500 mg) was applied to intact and damaged skin of six New Zealand White rabbits in a skin irritation study comparable to OECD guideline 404 but without GLP compliance. The test substance was applied on a tissue (2.5 x 2.5 cm) held in place by an occlusive dressing for 24 hours. The test rabbits were observed for 8 days. Application caused forming of edema (mean scores (24 and 72 hours) for intact and damaged skin were 1.6 and 1.5, respectively). Determination of erythema was not possible at 24 and 72 hours and at day 8 after treatment, due to substance induced coloration of the skin. Therefore, based on the result of this study, the test substance does not have high potential to cause skin irritation, however a definitive conclusion cannot be drawn.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not irritating)

Eye irritation

Link to relevant study records

Reference

Endpoint:

eye irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: Code of Federal Regulations, Title 16, Section 1500.42

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

GLP compliance:

no

Specific details on test material used for the study:

- Physical state: solid

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: W. Ostrop, Meerbusch
- Weight at study initiation: mean weight: 2.1 kg
- Housing: one per cage
- Diet (e.g. ad libitum): "muemmel z" (ssniff/Soest)
- Water (e.g. ad libitum): Water ad libitum
- Acclimation period: 4 - 6 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 16 - 18
- Humidity (%): 40 (relaive humidity)
- Photoperiod (hrs dark / hrs light): according to the day light rhythm

Vehicle:

unchanged (no vehicle)

Controls:

yes, concurrent no treatment

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 100 µL bulk volume

Duration of treatment / exposure:

One single application. Lids have been gently hold together for 1 sec. The eye was left unwashed.

Observation period (in vivo):

8 days

Number of animals or in vitro replicates:

6 males

Details on study design:

REMOVAL OF TEST SUBSTANCE
- Washing: no

SCORING SYSTEM: Draize numerical scores.

TOOL USED TO ASSESS SCORE: Ophtalmoscop; after 8 days with fluorescein and UV-light

Irritation parameter:

cornea opacity score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: no effects observed

Irritation parameter:

iris score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

2

Reversibility:

other: no effects observed

Irritation parameter:

conjunctivae score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

3

Reversibility:

other: no effects observed

Irritation parameter:

chemosis score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: no effects observed

Irritant / corrosive response data:

All scores at all time points were zero.

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance was concluded to be not irritating.

Executive summary:

In an eye irritation study comparable to OECD TG 405 (no GLP compliance), 100 µl of the test article was applied unchanged into the conjunctival sac of the right eye of six New Zealand White rabbits. Eyes were not rinsed. The left eyes remained untreated and served as controls. Animals were observed 24, 48 and 72 hours and 8 days after the treatment and the irritation parameters were scored. The cornea, iris, conjuctivae and chemosis scores were 0 at all time points (24, 48 and 72 hours) for all animals. Therefore, based on the results of this study, the test article was considered to be not irritating to the eye.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information

Skin irritation

To evaluate the skin irritating potential of the test substance, 0.5 g of the substance, slightly thickened with water, was applied to intact and damaged skin of six New Zealand White rabbits. The study was not GLP compliant but comparable to OECD testing guideline 404 (BASF, 1978). The test substance was applied on a tissue (2.5 x 2.5 cm) held in place by an occlusive dressing for 24 hours. The test animals were observed for 8 days. After application of the test substance edema were found on intact and damaged skin. Determination of erythema was not possible, due to a coloration of the skin by the test substance. Therefore, based on the result of this study, the test substance does not have high potential to cause skin irritation, however a definitive conclusion cannot be drawn.

 

Eye irritation

In an eye irritation study comparable to guideline 405 (non-GLP), 0.1 ml of the test substance was applied into the conjunctival sac of the right eye of six New Zealand White rabbits (BASF AG, 1978). Eyes were not rinsed. The left eyes remained untreated and served as controls. Animals were observed 24, 48 and 72 hours and 8 days after the treatment and the irritation parameters were scored. The cornea, iris, conjuctivae and chemosis scores were 0 at all observed time points for all animals. Therefore, based on the results of this study, the test article was considered to be not irritating to the eye.

 

Further toxicological data of category members:

Additional reliable data from several studies on skin an eye irritation are available for other members of the "perylene based pigments" category (see attached category justification). All of these data are taken into account for the evaluation and assessment of the irritation potential of the test article.

In several studies performed with other category members the potential to cause skin irritation was found to be very low. None of these studies raised any concerns regarding irritation and therefore none of the substances requires a classification. All compounds were considered to be not irritating to skin.

The potential to cause eye irritation was also found to be very low in studies performed with other category members. None of these studies raised any concerns regarding eye irritation and therefore none of the substances requires a classification. All compounds were considered to be not irritating to the eye.

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008

The available experimental test data are reliable and suitable for classification purposes under Regulation 1272/2008. A study similar to OECD 404 is available for skin irritation. A study similar to OECD 405 is available for eye irritation. In both studies, no or only slight and reversible signs of irritation were observed. As a result, the substance is not considered to be classified for skin or eye irritation under Regulation (EC) No. 1272/2008, as amended for the fourteenth time in Regulation (EC) No. 2020/217.