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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:
06 April 2010 - 22 April 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study has been performed according to OECD and/or EC guidelines and according to GLP principles.
Cross-reference
Reason / purpose for cross-reference:
reference to same study
Reference
Endpoint:
eye irritation: in vivo
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
See attached justification
Reason / purpose for cross-reference:
read-across source
Irritation parameter:
cornea opacity score
Remarks:
Opacity
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0
Max. score:
4
Reversibility:
other: No findings noted
Irritation parameter:
iris score
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0
Max. score:
2
Reversibility:
other: No findings.noted.
Irritation parameter:
conjunctivae score
Remarks:
Redness
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0.11
Max. score:
3
Reversibility:
fully reversible within: for 2 animals in 24 hours and for 1 animal in 48 hours
Irritation parameter:
chemosis score
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0
Max. score:
4
Reversibility:
fully reversible within: 24 hours (=1 animal)
Irritant / corrosive response data:
Instillation of 0.1 mL of Blown linseed oil into one eye of each of three rabbits resulted in irritation of the conjunctivae, which consisted of redness, chemosis and discharge. The irritation completely resolved within 24 hours in two animals and within 48 hours in the other animal.

No iridial irritation or corneal opacity were observed, and treatment of the eyes with 2% fluorescein 24 hours after test substance instillation revealed no corneal epithelial damage.

See also attached tables.
Other effects:
Coloration / Remnants
Remnants of the test substance were present on the outside of the eyelids on Days 1 and 2.

Toxicity / Mortality
No symptoms of systemic toxicity were observed in the animals during the test period and no mortality occurred.

For all details on the properties of the source material, the description of the analogue approach justification and the data matrix, see the attached document

Interpretation of results:
other:
Remarks:
not irritating, CLP criteria not met.
Conclusions:
The results obtained with the substance Blown linseed oil are suitable for the regulatory purpose of REACH for the substance Blown rapeseed oil: Not irritating

Data source

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

Materials and methods

Test guidelineopen allclose all
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
Qualifier:
according to guideline
Guideline:
EPA OPPTS 870.2400 (Acute Eye Irritation)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Japanese Ministry of Agriculture, Forestry and Fisheries (JMAFF), 12 Nousan, Notification No 8147, November 2000, including the most recent partial revisions.
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Reference substance name:
68649-95-6
Cas Number:
68649-95-6
IUPAC Name:
68649-95-6
Constituent 2
Reference substance name:
Linseed oil, oxidized
EC Number:
272-038-8
EC Name:
Linseed oil, oxidized
IUPAC Name:
272-038-8
Constituent 3
Reference substance name:
Oxidation products of seed oil obtained from Linum usitatissimum, Linaceae (linseed)
IUPAC Name:
Oxidation products of seed oil obtained from Linum usitatissimum, Linaceae (linseed)
Constituent 4
Reference substance name:
Linseed oil, oxidized
IUPAC Name:
Linseed oil, oxidized
Details on test material:
- Name of test material (as cited in study report): Blown linseed oil
- Substance type: Hazy yellow to brown liquid
- Physical state: Liquid
- Analytical purity: treated as 100% pure (also an UVCB)
- Stability under test conditions: Stable
- Storage condition of test material: At room temperature in the dark
- See attached document for more information

Test animals / tissue source

Species:
rabbit
Strain:
New Zealand White
Details on test animals or tissues and environmental conditions:
TEST ANIMALS
- Source: Harlan, Belton, Leics, England
- Age at study initiation: Animals used within the study were at least 6 weeks old
- Weight at study initiation: body weights were at least 1.0 kg.
- Housing: 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 (e.g. ad libitum): Pelleted diet for rabbits (Global Diet 2030 from Harlan Teklad®, Mucedola, Milanese, Italy) approximately 100 grams per day. Hay (TecniLab-BMI BV, Someren, The Netherlands) was provided at least three times a week.
- Water (e.g. ad libitum): Free access to tap water.
- Acclimation period: Acclimatization period was at least 5 days before start of treatment under laboratory conditions.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18.6 – 19.4ºC
- Humidity (%): 44 - 73%
Cleaning procedures in the room might have caused the temporary fluctuations above the optimal maximum level of 70% for relative humidity. Based on laboratory historical data, these fluctuations were considered not to have affected the study integrity.
- Air changes (per hr): 15
- Photoperiod (hrs dark / hrs light): 12 hours artificial fluorescent light and 12 hours darkness per day

IN LIFE DATES: From: 06 April 2010 To: 22 April 2010

Test system

Vehicle:
unchanged (no vehicle)
Controls:
other: One eye of each animal remained untreated and served as the reference control.
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.1 mL
Duration of treatment / exposure:
Single instillation on Day 1
Observation period (in vivo):
The eyes of each animal were examined approximately 1, 24, 48 and 72 hours after instillation of the test substance.
Number of animals or in vitro replicates:
3 Males
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 13 days later, after considering the degree of eye irritation observed in the first animal.

TREATMENT
Each animal was treated by instillation of 0.1 mL of the test substance 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. The other eye remained untreated and served as the reference control.

Immediately after the 24-hour observation, a solution of 2% fluorescein (Merck, Darmstadt, Germany) in water (adjusted to pH 7.0) was instilled into both eyes of each animal to quantitatively determine corneal epithelial damage. Any bright green stained area, indicating epithelial damage, was estimated as a percentage of the total corneal area.

After the final observation, the animals were sacrificed by intra-venous injection of Euthasol® 20% (AST Farma BV, Oudewater, The Netherlands).


REMOVAL OF TEST SUBSTANCE
- Washing (if done): No

OBSERVATION
The irritation was assessed according to the following numerical scoring system. At each observation, the highest scores given were recorded:

SCORING SYSTEM:
CORNEAL IRRITATION
Opacity: degree of density (area most dense taken for reading)
0: No ulceration or opacity (may include slight dulling of normal luster)
1: Scattered or diffuse areas of opacity, details of iris clearly visible
2: Easily discernible translucent area, details of iris slightly obscured
3: Nacreous area, no details of iris visible, size of pupil barely discernible
4: Opaque cornea, iris not discernible through the opacity

Area of cornea involved:
0: No ulceration or opacity
1: One quarter or less but not zero
2: Greater than one quarter, but less than half
3: Greater than half, but less than three quarters
4: Greater than three quarters, up to whole area

IRIS
0: Normal
1: Markedly deepened rugae, congestion, swelling, moderate circumcorneal hyperaemia,
or injection, any of these or combination thereof, iris still reacting to light
(sluggish reaction is positive)
2: No reaction to light, hemorrhage, gross destruction (any or all of these)

CONJUNCTIVAL IRRITATION
Redness (refers to palpebrae and sclera, excluding cornea and iris):
0: Blood vessels normal
1: Some blood vessels definitely hyperaemic (injected)
2: Diffuse, crimson color, individual vessels not easily discernible
3: Diffuse beefy red

Chemosis (refers to lids and/or nictitating membranes):
0: No swelling
1: Any swelling above normal (includes nictitating membranes)
2: Obvious swelling with partial eversion of lids
3: Swelling with lids about half closed
4: Swelling with lids more than half closed

Discharge:
0: No discharge (may include small amounts observed in inner canthus of normal animals)
1: Any amount different from normal and/or lacrimation
2: Discharge with moistening of the lids and hairs just adjacent to lids
3: Discharge with moistening of the lids and hairs (considerable area around the eye)

Where standard lighting was considered inadequate for observing minor effects, eye examinations were performed using an ophthalmic examination lamp.
In cases of equivocal results when comparing the treated and untreated eyes, the illustrated guide from the Consumer Product Safety Commission, Washington, D.C. 20207 was used for additional control purposes.

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
cornea opacity score
Remarks:
Opacity
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0
Max. score:
4
Reversibility:
other: No findings noted
Irritation parameter:
iris score
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0
Max. score:
2
Reversibility:
other: No findings.noted.
Irritation parameter:
conjunctivae score
Remarks:
Redness
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0.11
Max. score:
3
Reversibility:
fully reversible within: for 2 animals in 24 hours and for 1 animal in 48 hours
Irritation parameter:
chemosis score
Basis:
mean
Time point:
other: 24, 48 and 72 hrs
Score:
0
Max. score:
4
Reversibility:
fully reversible within: 24 hours (=1 animal)
Irritant / corrosive response data:
Instillation of 0.1 mL of Blown linseed oil into one eye of each of three rabbits resulted in irritation of the conjunctivae, which consisted of redness, chemosis and discharge. The irritation completely resolved within 24 hours in two animals and within 48 hours in the other animal.

No iridial irritation or corneal opacity were observed, and treatment of the eyes with 2% fluorescein 24 hours after test substance instillation revealed no corneal epithelial damage.

See also attached tables.
Other effects:
Coloration / Remnants
Remnants of the test substance were present on the outside of the eyelids on Days 1 and 2.

Toxicity / Mortality
No symptoms of systemic toxicity were observed in the animals during the test period and no mortality occurred.

Any other information on results incl. tables

For all details on the properties of the source material, the description of the analogue approach justification and the data matrix, see the attached document

Applicant's summary and conclusion

Interpretation of results:
other:
Remarks:
not irritating, CLP criteria not met.
Conclusions:
The results obtained with the substance Blown linseed oil are suitable for the regulatory purpose of REACH for the substance Blown rapeseed oil: Not irritating

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