Octane

Eye irritation

Administrative data

Endpoint:

eye irritation: in vivo

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

1991

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Acceptable, well-documented study report equivalent or similar to OECD guideline 405: GLP.

Justification for type of information:

A discussion and report on the read across strategy is given as an attachment in IUCLID Section 13.

Cross-reference

Reason / purpose for cross-reference:

read-across: supporting information

Reference

Endpoint:

eye irritation: in vivo

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

1991

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Acceptable, well-documented study report equivalent or similar to OECD guideline 405: GLP.

Justification for type of information:

A discussion and report on the read across strategy is given as an attachment in IUCLID Section 13.

Reason / purpose for cross-reference:

read-across source

Irritation parameter:

chemosis score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Irritation parameter:

conjunctivae score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Irritation parameter:

iris score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Irritation parameter:

cornea opacity score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Interpretation of results:

other: Not irritating

Remarks:

Criteria used for interpretation of results: EU

Conclusions:

The mean corneal opacity, iris lesion, conjunctivae redness, and chemosis scores for MRD-91-972 were all 0. Classification as an ocular irritant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.

Executive summary:

This data is being read across from the source study that tested Hydrocarbons, C9-C11, isoalkanes, cyclics, <2% aromatics based on analogue read across.

MRD-91-972 was administered to the right eye of six male rabbits to assess for ocular irritation. Ocular examinations occurred at 1h, 24h, 48h, 72h, and day 7 post instillation. Ocular damage was assessed and scored according to the Draize eye test. All animals survived the exposure. Ocular instillation of the test material elicited conjunctival irritation limited to redness noted in five of the six test animals at the 1 hour observation.  No other signs of ocular irritation were noted during the study.  The mean corneal opacity, iris lesion, conjunctivae redness, and chemosis scores for MRD-91-972 were 0, 0, 0, and 0 respectively. Classification as an ocular irritant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1991

Report date:

1991

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Hydrocarbons, C9-C11, isoalkanes, cyclics, <2% aromatics

EC Number:

920-134-1

Molecular formula:

none available - not a single isomer - see remarks

IUPAC Name:

Hydrocarbons, C9-C11, isoalkanes, cyclics, <2% aromatics

Details on test material:

- Name of test material (as cited in study report): MRD-91-972
- Physical state: colorless liquid
- Analytical purity: assumed to be 100%

Test animals / tissue source

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: Hazleton Research Products
- Age at study initiation: ca. 12 weeks
- Weight at study initiation: 2.14-2.49 kg
- Housing: individually
- Diet (e.g. ad libitum): Agway restricted feeding regimen
- Water (e.g. ad libitum): ad libitum
- Acclimation period: 8 days


ENVIRONMENTAL CONDITIONS
- Temperature (°F): 65-70
- Humidity (%): 40-60%
- Photoperiod (hrs dark / hrs light): 12/12


IN-LIFE DATES: From: 1991-05-09 To: 1997-05-21

Test system

Vehicle:

unchanged (no vehicle)

Controls:

other: untreated eye of each animal served as the control

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.1ml

Duration of treatment / exposure:

The test material was instilled into the lower conjunctival sac of the right eye of each animal. The upper and lower lids were gently held together for approximately 1 second to prevent loss of the material. The treated eyes remained unwashed.

Observation period (in vivo):

Animals were observed for viability twice daily on Monday-Friday, and once daily on Saturday and Sunday. Observations of signs of ocular irritation were made 1, 24, 48, and 72 hours post-instillation and on Day 7.

Number of animals or in vitro replicates:

six males

Details on study design:

SCORING SYSTEM: Draize


TOOL USED TO ASSESS SCORE: 2% sodium fluorescein dye under UV light

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

chemosis score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Results 2

Irritation parameter:

conjunctivae score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Results 3

Irritation parameter:

iris score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Results 4

Irritation parameter:

cornea opacity score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Remarks on result:

other: average of six animals

Applicant's summary and conclusion

Interpretation of results:

other: Not irritating

Remarks:

Criteria used for interpretation of results: EU

Conclusions:

The mean corneal opacity, iris lesion, conjunctivae redness, and chemosis scores for MRD-91-972 were all 0. Classification as an ocular irritant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.

Executive summary:

MRD-91-972 was administered to the right eye of six male rabbits to assess for ocular irritation. Ocular examinations occurred at 1h, 24h, 48h, 72h, and day 7 post instillation. Ocular damage was assessed and scored according to the Draize eye test. All animals survived the exposure. Ocular instillation of the test material elicited conjunctival irritation limited to redness noted in five of the six test animals at the 1 hour observation.  No other signs of ocular irritation were noted during the study.  The mean corneal opacity, iris lesion, conjunctivae redness, and chemosis scores for MRD-91-972 were 0, 0, 0, and 0 respectively. Classification as an ocular irritant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.