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Toxicological information

Eye irritation

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Administrative data

Endpoint:
eye irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
09 April 2015 - 27 April 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was performed as a data requirement for a registration in China. In the interest of animal welfare and to minimize any testing likely to produce severe responses in animals, a weight of evidence analysis was performed, prior to the start of this in vivo eye irritation study in the rabbit.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report date:
2016

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
Version / remarks:
2012
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion)
Version / remarks:
May 2008, including most recent amendments
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 870.2400 (Acute Eye Irritation)
Version / remarks:
1998
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: JMAFF Guidelines
Version / remarks:
2000, including the most recent revisions.
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
d.d. 3 November 2015

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
420-990-1
EC Name:
-
Cas Number:
146421-65-0
Molecular formula:
C20H36N2O6
IUPAC Name:
4-(ethenyloxy)butyl N-[6-({[4-(ethenyloxy)butoxy]carbonyl}amino)hexyl]carbamate
Constituent 2
Chemical structure
Reference substance name:
4-(ethenyloxy)butyl N-{6-[({[6-({[6-({[4-(ethenyloxy)butoxy]carbonyl}amino)hexyl]carbamoyl}oxy)hexyl]oxy}carbonyl)amino]hexyl}carbamate
Cas Number:
1516571-16-6
Molecular formula:
C34H62N4O10
IUPAC Name:
4-(ethenyloxy)butyl N-{6-[({[6-({[6-({[4-(ethenyloxy)butoxy]carbonyl}amino)hexyl]carbamoyl}oxy)hexyl]oxy}carbonyl)amino]hexyl}carbamate
Test material form:
solid: flakes
Details on test material:
- Name of test material (as cited in study report): Uralac P 1920C
- Appearance: Colourless to light yellow flakes

Test animals / tissue source

Species:
rabbit
Strain:
New Zealand White
Details on test animals or tissues and environmental conditions:
TEST ANIMALS
- Source: Charles River France, L’Arbresle Cedex, France
- Age at study initiation: 17 and 19 weeks old
- Weight at study initiation: 3101 - 3501 g
- Housing: Animals were individually housed in labeled cages with perforated floors (Ebeco, Germany, dimensions 67 x 62 x 55 cm) and shelters (Ebeco, Germany, dimensions 40 x 32 x 23 cm).
- Diet: approx 100 grams per day pelleted diet for rabbits (Global Diet 2030 from Harlan Teklad®, Mucedola, Milanese, Italy). Hay and wooden sticks were available during the study period.
- Water: tap water, ad libitum
- Acclimation period: at least 5 days

Diet, water, bedding and cage enrichment evaluation for contaminants and/or nutrients was performed according to facility standard procedures. There were no findings that could interfere with the study.

ENVIRONMENTAL CONDITIONS(set to maintain)
- Temperature (°C): 18 - 24
- Humidity (%): 40 - 70
- Air changes (per hr): at least 10
- Photoperiod (hrs dark / hrs light): 12/12

Test system

Vehicle:
unchanged (no vehicle)
Controls:
other: One eye of each animal remained untreated and served as the reference control.
Amount / concentration applied:
63.4 – 63.7 mg (approx 0.1 mL)
Duration of treatment / exposure:
Single instillation on day 1.
Observation period (in vivo):
7 days
Number of animals or in vitro replicates:
3
Details on study design:
Study Design:
The study was performed in a stepwise manner and was started by treatment of a single rabbit (sentinel). The two other animals were treated in a similar manner 11 days later, after considering the degree of eye irritation observed in the first animal. Animals were treated by instillation of, on average, 63.6 mg (range 63.4 – 63.7 mg) of the test substance (a volume of approximately 0.1 mL), in the conjunctival sac of one of the eyes 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 the test substance. Immediately after the 24-hour observation, a solution of 2% fluorescein in water (adjusted to pH 7.0) was instilled into both eyes of each animal to quantitatively determine corneal epithelial damage.

Analgesia:
One hour prior to instillation, the rabbits were subcutaneouslyinjected with 0.01 mg/kg buprenorphine and 5 minutes prior to instillation, two drops of topical anesthetic alcaine 0.5% were applied to both eyes.
After fluorescein examination, 0.01 mg/kg buprenorphine and 0.5 mg/kg meloxicam were subcutaneously injected.

Observations:
Mortality/Viability: Twice daily.
Toxicity: At least once daily.
Body Weight: Day of treatment (prior to instillation) and after the final observation.
Irritation: The eyes of each animal were examined approximately 1, 24, 48 and 72 hours and 7 days after instillation of the test substance.
Other: Local effects were recorded.

Scoring system:
Draize scale

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
cornea opacity score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Reversibility:
other: Not relevant
Irritation parameter:
iris score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
2
Reversibility:
other: Not relevant
Irritation parameter:
conjunctivae score
Remarks:
Redness
Basis:
animal #1
Time point:
24/48/72 h
Score:
1.33
Max. score:
3
Reversibility:
fully reversible within: 7 days
Irritation parameter:
chemosis score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0.7
Max. score:
4
Reversibility:
fully reversible within: 72 hours
Irritation parameter:
cornea opacity score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Reversibility:
other: Not relevant
Irritation parameter:
iris score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
2
Reversibility:
other: Not relevant
Irritation parameter:
conjunctivae score
Remarks:
Redness
Basis:
animal #2
Time point:
24/48/72 h
Score:
1
Max. score:
3
Reversibility:
fully reversible within: 7 days
Irritation parameter:
chemosis score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0.3
Max. score:
4
Reversibility:
fully reversible within: 48 hours
Irritation parameter:
cornea opacity score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Reversibility:
other: Not relevant
Irritation parameter:
iris score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
2
Reversibility:
other: Not relevant
Irritation parameter:
conjunctivae score
Remarks:
Redness
Basis:
animal #3
Time point:
24/48/72 h
Score:
1.3
Max. score:
3
Reversibility:
fully reversible within: 7 days
Irritation parameter:
chemosis score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0.3
Max. score:
4
Reversibility:
fully reversible within: 48 hours
Irritant / corrosive response data:
Irritation of the conjunctivae in the form of redness, chemosis and discharge was observed. All irritation effects had resolved after 7 days.
Other effects:
Remnants of the test substance on the outside of the eyelids was observed 1 hour after installation.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
Based on the results of an eye irritation study performed according to OECD guideline 405 and EU method B.5, URALAC P 1920C is not classified for adverse effects on the eye according to CLP and GHS criteria.
Executive summary:

An eye irritation study was performed according to OECD guideline 405 and EU method B.5. This in vivo study was performed as a data requirement for a registration in China. Three rabbits were exposed in a step-wise manner by a single instillation of 63.4 – 63.7 mg (approx 0.1 mL) test item in one eye. Minor rrritation of the conjunctivae in the form of redness, chemosis and discharge was observed. All irritation effects had resolved after 7 days. Based on the results, URALAC P 1920C is not classified according to CLP and GHS criteria.

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