2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-8-[2-[2-sulfo-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]diazenyl]-, potassium sodium salt (1:?:?), coupled with diazotized 2-[(4-amino-5-methoxy-2-methylphenyl)sulfonyl]ethyl hydrogen sulfate

Endpoint summary

Description of key information

The test substance was found not to be irritating or corrosive to the skin, but causes irreversible damage to the eye.

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

Study period:

Experiment start date - 12 June 2003; Experiment end date - 02 July 2003; Study completion date - 05 August 2003.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Identity: FAT 40812/A
Batch: WP 8/03
Purity: approx. 75 %
Appearance: Solid, dark red-brownish powder
Expiration date: 23 April 2010
Storage: At room temperature at about 20 °C

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Elevage Scientifique des Dombes, F-01400 Chatillon sur Chalaronne / France
- Age at treatment: 14-15 weeks (male), 13-14 weeks (female)
- Body weight at treatment: 2745 - 3124 g
- Housing: Individually in stainless steel cages equipped with feed hoppers and drinking water bowls. Wood blocks (RCC Ltd, Füllinsdorf) and haysticks 4646 (batch no. 0301, Provimi Kliba AG) were provided for gnawing.
- Diet: Pelleted standard Provimi Kliba 3418 rabbit maintenance diet ad libitum (batch no. 28/03) provided by Provimi Kliba AG, CH-4303 Kaiseraugst.
- Water: Community tap water from Füllinsdorf, ad libitum.
- Acclimation period: Under laboratory conditions after health examination. Only animals without any visual signs of illness were used for the study.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17 - 23
- Humidity (%): 30 - 70
- Air changes (per hr): 10 - 15
- Photoperiod (hrs dark / hrs light): 12/12

Room temperature and humidity were monitored continuously and values outside of these ranges may have occasionally occurred, usually following room cleaning. These transient variations are considered not to have any influence on the study and, therefore, these data are not reported but are retained at RCC.

Type of coverage:

semiocclusive

Preparation of test site:

clipped

Vehicle:

water

Controls:

no

Amount / concentration applied:

0.5 g test substance moistened with approximately 0.1 mL purified water.

Duration of treatment / exposure:

4 hours

Observation period:

14 days

Number of animals:

1 male, 2 females

Details on study design:

TREATMENT
Four days before treatment, the left flank was clipped with an electric clipper, exposing an area of approximately 100 cm² (10 cm x 10 cm). The skin of the animals was examined one day before treatment, and regrown fur of all animals was clipped again. Animals with overt signs of skin injury or marked irritation which may have interfered with the interpretation of the results were not used in the test. On the day of treatment, 0.5 g of FAT 40812/A was placed on a surgical gauze patch (ca. 4 cm x 4 cm). This gauze patch was applied to the intact skin of the clipped area. The patch was covered with a semi-occlusive dressing. The dressing was wrapped around the abdomen and anchored with tape. The duration of treatment was 4 hours. Then the dressing was removed and the skin was flushed with lukewarm tap water to clean the application site.

OBSERVATIONS
Viability/Mortality: Daily from acclimatization of the animals to the termination of test.
Clinical signs: Daily from acclimatization of the animals to the termination of test.
Body weights: At start of acclimatization, on the day of application and at termination of observation.

SCORING SYSTEM:
The skin reaction was assessed according to the numerical scoring system listed in the EEC Commission Directive 92/96/EEC, July 31, 1992 approximately 1, 24, 48 and 72 hours, as well as 7, 10 and 14 days after the removal of the dressing, gauze patch and test item. To allow further examination of the test sites all animals were re-clipped on completion of the 48 hour and 7-day examination. If evident, corrosive or staining properties of the test item were described and recorded.

SCORING SYSTEM:
Evaluation of Skin Reactions

Erythema and Eschar Formation
No erythema 0
Very slight erythema (barely perceptible) 1
Well defined erythema 2
Moderate to severe erythema 3
Severe erythema (beet redness) to slight eschar formation (injuries in depth) 4

Edema Formation
No edema 0
Very slight edema (barely perceptible) 1
Slight edema (edges of area well defined by definite raising 2
Moderate edema (raised approximately 1 mm) 3
Severe edema (raised more than 1 mm and extending beyond area of exposure) 4

Irritation parameter:

erythema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Remarks on result:

no indication of irritation

Irritation parameter:

edema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Remarks on result:

no indication of irritation

Irritant / corrosive response data:

- With the exception of the red staining, the test item did not elicit any skin reactions at the application site of any animal at any of the observation times.
- Neither alterations of the treated skin were observed nor were corrosive effects evident on the skin.

Other effects:

- Slight to marked red staining of the treated skin produced by the test item was observed in all animals from the 1-hour to the 72-hour reading after treatment. Slight red staining was still visible in all animals up to 10 days after treatment.
- No clinical signs of systemic toxicity were observed in the animals during the study and no mortality occurred.
- The body weights of all rabbits were considered to be within the normal range of variability.

Interpretation of results:

GHS criteria not met

Conclusions:

Test substance is considered to be not irritating to the rabbit skin.

Executive summary:

In a GLP-compliant skin irritation study, performed according to OECD guideline 404, the test substance (moistened, 0.5 g) was applied, semi-occlusive, to the skin of three New Zealand White rabbits for 4 hours. After 4 hours, the dressing was removed and the skin was flushed with lukewarm tap water and observations were made for an additional 14 days. The test substance showed an edema and erythema score of 0 during the whole observation period. Slight red staining was observed on all animals up to 10 days after treatment. No corrosive effects were noted. Also no other clinical signs of test item related effects were observed. Under the conditions of this experiment, the test substance was found to be not irritating to rabbit skin.

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

Study period:

Experiment start date - 08 July 2003; Experiment end date - 04 August 2003; Study completion date - 03 September 2003.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Identity: FAT 40812/A
Batch: WP 8/03
Purity: approx. 75 %
Appearance: Solid, dark red-brownish powder
Expiration date: 23 April 2010
Storage: At room temperature at about 20 °C

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: Elevage Scientifique des Dombes, F-01400 Chatillon sur Chalaronne / France
- Age at treatment: 10 weeks (male), 11 weeks (females)
- Bodyweight at treatment: 2227 - 2574 g
- Housing: Individually in stainless steel cages equipped with feed hoppers and drinking water bowls. Wood blocks (RCC Ltd., Füllinsdorf) and haysticks 4646 (batch no. 0301, Provimi Kliba AG) were provided for gnawing.
- Diet: Pelleted standard Provimi Kliba 3418 rabbit maintenance diet ad libitum (batch no. 28/03) provided by Provimi Kliba AG, CH-4303 Kaiseraugst.
- Water: Community tap water from Füllinsdorf, ad libitum.
- Acclimation period: Under laboratory conditions after health examination. Only animals without any visual signs of illness were used for the study.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17 - 23
- Humidity (%): 30 - 70
- Air changes (per hr): 10 - 15
- Photoperiod (hrs dark / hrs light): 12/12

Room temperature and humidity were monitored continuously and values outside of these ranges may have occasionally occurred, usually following room cleaning. These transient variations are considered not to have any influence on the study and, therefore, these data are not reported but are retained at RCC.

Vehicle:

unchanged (no vehicle)

Controls:

no

Amount / concentration applied:

0.1 g

Duration of treatment / exposure:

21 days

Observation period (in vivo):

up to 21 days

Number of animals or in vitro replicates:

1 male, 2 females

Details on study design:

TREATMENT:
The eyes of the animals were examined one day prior to test item administration. Animals with overt signs of ocular injury or irritation which may have interfered with the interpretation of the results were not used in the test. On the day of treatment, 0.1 g of FAT 40'812/A was placed in the conjunctival sac of the left eye of each animal after gently pulling the lower lid away from the eyeball. The lids were then gently held together for about one second to prevent loss of test item. The right eye remained untreated and served as the reference control. The treated eyes were not rinsed after instillation.

OBSERVATIONS:
Viability/Mortality: Daily from acclimatization of the animals to the termination of test.
Clinical signs: Daily from acclimatization of the animals to the termination of test.
Body weights: At start of acclimatization, on the day of application and at termination of observation.

SCORING SYSTEM:
The ocular reaction was assessed according to the numerical scoring system listed in the EEC Commission Directive 92/96/EEC, July 31, 1992 at approximately 1, 24, 48 and 72 hours, as well as 7, 10, 14, 17, and 21 days after instillation. When present, corrosion and/or staining of conjunctivae, sclerae and cornea by the test item were recorded and reported.

TOOL USED TO ASSESS SCORE:
Eye examinations were made with a Varta Cliptrix diagnostic-lamp (Roth AG, CH-4153 Reinach/Switzerland).


SCORING SYSTEM: Scale for scoring Ocular Lesions.
1.Cornea
(A) Opacity-degree of density (area most dense taken for reading)
- No opacity: 0
- Scattered or diffuse area, details of iris clearly visible: 1
- Easily discernible translucent areas, details of iris slightly obscured: 2
- Opalescent areas, no details of iris visible, size of pupil barely discernible: 3
- Opaque, iris invisible: 4

(B) Area of cornea involved
- One quarter (or less) but not zero: 1
- Greater than one quarter but less than half: 2
- Greater than half, but less than three quarters: 3
- Greater than three quarters, up to whole area: 4

2.Iris
(A) Values
- Normal: 0
- Folds above normal, congestion, swelling, circumcorneal injection (any or all of these or combination of any thereof) iris still reacting
to light (sluggish reaction is positive): 1
- No reaction to light, haemorrhage, gross destruction (any or all of these): 2
Ax5 Total maximum=10

3.Conjunctivae
(A) Redness (refers to palpebral and bulbar conjunctivae excluding cornea and iris)
- Vessels normal: 0
- Vessels definitely injected above normal: 1
- More diffuse, deeper crimson red, individual vessels not easily discernible: 2
- Diffuse beefy red: 3

(B) Chemosis
- No swelling: 0
- Any swelling above normal (includes nictitating membrane): 1
- Obvious swelling with partial eversion of lids: 2
- Swelling with lids about half closed: 3
- Swelling with lids about half closed to completely closed: 4

(C) Discharge'
- No discharge: 0
- Any amount different from normal (does not include small amounts observed" in inner canthus of normal animals): 1
- Discharge with moistening of the lids and hairs just adjacent to lids: 2
- Discharge with moistening of the lids and hairs, and considerable area around the eye: 3

TOOL USED TO ASSESS SCORE: Slit lamp

Irritation parameter:

cornea opacity score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Remarks on result:

no indication of irritation

Irritation parameter:

iris score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

2

Remarks on result:

no indication of irritation

Irritation parameter:

conjunctivae score

Basis:

mean

Time point:

24/48/72 h

Score:

0.67

Max. score:

3

Reversibility:

fully reversible within: 7 days

Remarks on result:

no indication of irritation

Irritation parameter:

chemosis score

Basis:

mean

Time point:

24/48/72 h

Score:

0.22

Max. score:

4

Reversibility:

fully reversible within: 48 hours

Remarks on result:

no indication of irritation

Irritant / corrosive response data:

- No abnormal findings were observed in the cornea or iris of any animal at any of the measurement intervals. Slight reddening of the conjunctivae was observed in all animals at the 1- and 24-hour reading. Slight reddening was still noted in two animals at the 48-hour examination and persisted in one animal up to 72-hours after treatment. Moderate swelling of the conjunctivae (oedema) was noted in all animals at the 1-hour reading. Slight swelling of the conjunctivae was still evident in two animals 24 hours after treatment. Slight reddening of the sclerea was present in all animals at the 1-hour reading and persisted in one animal up to 24-hours after treatment. Slight to moderate discharge was noted in all animals at the 1-hour examination. One animal screamed immediately after application of the test item for a few seconds.
- No corrosion of the cornea was observed at any of the reading times.

Other effects:

- Slight red staining of the treated eyes produced by the test item was observed in all animals one hour after treatment and persisted in all animals up to the end of the observation period. Red remnants of the test item were observed in the eye or conjunctival sac of all animals one hour after treatment.
- No clinical signs of systemic toxicity were observed in the animals during the study and no mortality occurred. One animal screamed after the application.
- The body weights of all rabbits were considered to be within the normal range of variability.

Interpretation of results:

Category 1 (irreversible effects on the eye) based on GHS criteria

Conclusions:

Red staining of the treated eyes produced by the test item observed in all animals persisted up to the 21 days after treatment.

Executive summary:

In a GLP-compliant eye irritation study, performed according to OECD guideline 405, test substance (0.1 g) was placed in the conjunctional sac of the left eye of 3 New Zealand White rabbits. Scoring of irritation effects was performed approximately 1, 24, 48 and 72 hours, as well as 7, 10, 14, 17, and 21 days after test item instillation. The instillation of the test substance into the eye resulted in mild, early-onset and transient ocular changes, such as reddening of the conjunctivae and sclerea, discharge and chemosis. These effects were reversible and were no longer evident 7 days after treatment. The mean 24/48/72h corneal opacity, iris scores were zero, the conjuctiva and chemosis score were recorded to be 0,67 and 0.22, respectively. Red staining of the treated eyes produced by the test item was observed in all animals at the 1-hour examination and persisted up to the observation 21 days after treatment. No abnormal findings were observed in the iris of any animal at any of the examinations, no corrosion was observed at any of the measuring intervals and no clinical signs were observed.

Endpoint conclusion

Endpoint conclusion:

adverse effect observed (irritating)

Respiratory irritation

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information

Skin irritation:

In a GLP-compliant skin irritation study, performed according to OECD guideline 404, the test substance (moistened, 0.5 g) was applied, semi-occlusive, to the skin of three New Zealand White rabbits for 4 hours (RCC 2003). After 4 hours, the dressing was removed, and the skin was flushed with lukewarm tap water and observations were made for an additional 14 days. The test substance showed an edema and erythema score of 0 during the whole observation period. Slight red staining was observed on all animals up to 10 days after treatment. No corrosive effects were noted. Also, no other clinical signs of test item related effects were observed. Under the conditions of this experiment, the test substance was found to be not irritating or corrosive.

 

Eye irritation:

In a GLP-compliant eye irritation study, performed according to OECD guideline 405, test substance (0.1 g) was placed in the conjunctional sac of the left eye of 3 New Zealand White rabbits. The mean 24/48/72h corneal opacity, iris scores were zero, the conjuctiva and chemosis score were recorded to be 0,67 and 0.22, respectively. Red staining of the treated eyes produced by the test item was observed in all animals at the 1-hour examination and persisted up to the observation 21 days after treatment. No abnormal findings were observed in the iris of any animal at any of the examinations, no corrosion was observed at any of the measuring intervals and no clinical signs were observed.

Justification for classification or non-classification

Based on the findings in the skin irritation study the test substance does not need to be classified according to the Directive 67/548/EEC and according to the EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.

Based on the findings (staining of the eye at the end of the observation period) in the eye irritation study, the substance needs to be classified with Eye Dam. 1, H318 according to the EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.