Registration Dossier

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:
2010-08-03 to 2010-08-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study reliable without restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
Version / remarks:
, 2002-04-24
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
signed 2009-11-12

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid
Details on test material:
- Name of test material (as cited in study report): Barium carbonate - standard
- Chemical description: Barium carbonate
- Batch No.: HOB L6523
- Molecular formula: BaCO3
- Molecular weight: 197.34 g/mol
- Physical state: Solid, white powder
- Storage condition of test material: Ambient temperature, dark, dry and original containers
- Expiration date of the batch: unlimited if stored in tightly closed original container at room temperature

Test animals / tissue source

Species:
rabbit
Strain:
Himalayan
Details on test animals or tissues and environmental conditions:
TEST ANIMALS
- Source: LPT Laboratory of Pharmacology and Toxicology GmbH & Co. KG, Branch Löhndorf, 24601 Löhndorf/Post Wankendorf, Germany
- Age at study initiation: Approx. 4.5 - 5.5 months
- Weight at study initiation: Animal 1: 2.5 kg; Animal 2: 2.4 kg; Animal 3: 3.1 kg
- Housing: For 8 hours following test item application, the animals were kept singly in restrainers which allowed free movement of the head but prevented a complete body turn, wiping of the eyes with the paws and excluded irritation of the eye by excrements and urine. During the acclimatisation period and after the 8-hour period in restrainers, the animals were kept singly in cages with dimensions of 380 mm x 425 mm x 600 mm (manufacturer: Dipl.Ing. W. EHRET GmbH, 16352 Schönwalde, Germany).
- Diet (ad libitum): Commercial diet, ssniff7 K-H V2333 (ssniff Spezialdiäten GmbH, 59494 Soest, Germany)
- Water (ad libitum before and after the exposure period): Tap water
- Acclimation period: At least 20 adaptation days

ENVIRONMENTAL CONDITIONS
- Temperature: 20 °C +/- 3 °C (maximum range)
- Relative humidity: 30% - 70% (maximum range; aim was 50% - 60%)
- Photoperiod (hrs dark / hrs light): 12/12
No further information on the test animals was stated.

Test system

Vehicle:
unchanged (no vehicle)
Controls:
no
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 100 mg of the test item were administered into one eye each of three animals. The test item was placed into the conjunctival sac of the right 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 in order to prevent loss of the material. The left eye, which remained untreated, served as a control.
No further information on the amount/concentration applied was stated.
Duration of treatment / exposure:
1 hour (One hour after application the eyes were rinsed.)
Observation period (in vivo):
1, 24, 48 and 72 hours after the administration
Number of animals or in vitro replicates:
3 male rabbits
Details on study design:
The test was performed initially using one animal. As no corrosive or severe irritant effects were observed in this animal, 2 further animals were employed 24 hours after start of the initial test.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): The eyes were rinsed with portions of 20 mL 0.9 % aqueous NaCl solution, each.
- Time after start of exposure: 1 hour after administration

SCORING SYSTEM: draize scoring system

TOOL USED TO ASSESS SCORE: The eyes were examined ophthalmoscopically with a slit lamp prior to the administration and 1, 24, 48 and 72 hours after the administration. The eye reactions were observed and registered.
24 hours after administration, fluorescein (Fluorescein SE Thilo drops (ALCON PHARMA GmbH, 79108 Freiburg, Germany) was applied to the eyes before being examined to aid evaluation of the cornea for possible lesions.

OTHER OBSERVATIONS: Any further lesions not covered by the scoring system were recorded. Body weight of all animals was measured at the beginning of the study and at the end of the study. Behaviour and food consumption were monitored.
No further information on the study design was stated.

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
cornea opacity score
Basis:
mean
Remarks:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
iris score
Basis:
mean
Remarks:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
conjunctivae score
Basis:
mean
Remarks:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
chemosis score
Basis:
mean
Remarks:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
cornea opacity score
Basis:
mean
Remarks:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
iris score
Basis:
mean
Remarks:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
conjunctivae score
Basis:
mean
Remarks:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
chemosis score
Basis:
mean
Remarks:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
cornea opacity score
Basis:
mean
Remarks:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
iris score
Basis:
mean
Remarks:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
conjunctivae score
Basis:
mean
Remarks:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritation parameter:
chemosis score
Basis:
mean
Remarks:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
0
Irritant / corrosive response data:
Conjunctival redness (grade 1 (Some blood vessels hyperaemic (injected)) was observed in all animals 1 hour after instillation. This effect was reversible after 24 hours.
In addition, secretion was observed in all animals 1 hour after instillation.
The cornea and the irises were not affected by instillation of the test item and the fluorescein test performed 24 hours after instillation did not reveal any changes.
Other effects:
There were no systemic intolerance reactions.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
According to the EC-Commission directive 67/548/EEC and its subsequent amendments on the approximation of the laws, regulations and administrative provision relating to the classification, packaging and labelling of dangerous substances and the results obtained under the present test conditions barium carbonate - standard was non-irritating to eyes, hence, no labelling is required.
According to the EC Regulation 1272/2008 and subsequent regulations, the test item is non-irritating to eyes; no classification and labelling of the substance is necessary.