Anthraquinone acid dye

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

20 November 2008 to 23 November 2008

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted to GLP in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Details on test material:

dark red powder
Batch number MB-1-A
Storage conditions: room temperature in dark
The pH of the test material was determined prior to commencement of the study and found to be as follows:
Preparation: 10% w/w aqueous preparation of the test material
pH Measurement immediately: 4.1
pH Measurement after 10 minutes: 4.1

Test animals

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Harlan Laboratories UK Limited, Bicester, Oxon, UK
- Age at study initiation: 12 to 20 weeks old
- Weight at study initiation: 2.0 to 3.5 kg
- Housing: individually housed in suspended cages
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
Diet and drinking water were considered not to contain any contaminant of a level that might have affected the purpose or integrity of the study.
- Acclimation period: at least 5 days
The animals were provided with environmental enrichment items which were considered not to contain any contaminant of a level that might have affected the purpose or integrity of the study.

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


IN-LIFE DATES: From: 20 November 2008 To: 23 November 2008

Test system

Type of coverage:

semiocclusive

Preparation of test site:

shaved

Vehicle:

water

Controls:

not required

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 g of the test material, moistened with 0.5 ml of distilled water
- Concentration (if solution): Not applicable

Duration of treatment / exposure:

4 hours

Observation period:

Approximately one hour following the removal of the patches, and 24, 48 and 72 hours later, the test sites were examined for evidence of primary irritation and scored.

Number of animals:

Three

Details on study design:

On the day before the test each of a group of three rabbits was clipped free of fur from the dorsal/flank area using veterinary clippers. Only animals with a healthy intact epidermis by gross observation were selected for the study.

TEST SITE
- Area of exposure: 2.5 cm x 2.5 cm
- % coverage: No data available
- Type of wrap if used: Surgical adhesive tape and elasticated corset

REMOVAL OF TEST SUBSTANCE
Four hours after application the corset and patches were removed from each animal and any residual test material removed by gentle swabbing with cotton wool soaked in distilled water.

SCORING SYSTEM: Draize J H (1959) "Dermal Toxicity" In: Appraisal of the Safety of Chemicals in Foods, Drugs and Cosmetics. Association of Food and Drug Officials of the United States, Austin, Texas, p.46-59.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

animal #1

Remarks:

(mean score 1)

Time point:

other: 24, 48 and 72 hours

Score:

0

Max. score:

0

Reversibility:

fully reversible

Results 2

Irritation parameter:

erythema score

Basis:

animal #2

Remarks:

(mean score 2)

Time point:

other: 24, 48 and 72 hours

Score:

0

Max. score:

0

Reversibility:

fully reversible

Results 3

Irritation parameter:

erythema score

Basis:

animal #3

Remarks:

(mean score 3)

Time point:

other: 24, 48 and 72 hours

Score:

0

Max. score:

0

Reversibility:

fully reversible

Results 4

Irritation parameter:

edema score

Basis:

animal #1

Remarks:

(mean score 1)

Time point:

other: 24, 48 and 72 hours

Score:

0

Max. score:

0

Reversibility:

fully reversible

Results 5

Irritation parameter:

edema score

Basis:

animal #2

Remarks:

(mean score 2)

Time point:

other: 24, 48 and 72 hours

Score:

0

Max. score:

0

Reversibility:

fully reversible

Results 6

Irritation parameter:

edema score

Basis:

animal #3

Remarks:

(mean score 3)

Time point:

other: 24, 48 and 72 hours

Score:

0

Max. score:

0

Reversibility:

fully reversible

Irritant / corrosive response data:

Red coloured staining was noted at all treated skin sites throughout the study but did not affect evaluation of skin responses.
No evidence of skin irritation was noted during the study.

Other effects:

Two animals showed expected gain in bodyweight and one animal showed no gain in bodyweight during the study.

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The test material produced a primary irritation index of 0.0 and was classified as non-irritant to rabbit skin according to the Draize classification scheme. No corrosive effects were noted.

Executive summary:

In a primary dermal irritation study (0959/0238), male New Zealand White rabbits were dermally exposed to 0.5 g of INK BH11 M moistened with distilled water for 4 hours to a 2.5 cm x 2.5 cm area of skin. Animals then were observed for 3 days. Irritation was scored by the method of the Draize classification scheme. No dermal irritation was observed at any sites on the three rabbits. In this study, INK BH11 M is not classified as a dermal irritant.