Reaction products of n-octanol and acrylic acid, first distillation pitch

Eye irritation

Administrative data

Endpoint:

eye irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From April 3, 2012 to July 27, 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.2400 (Acute Eye Irritation)

Deviations:

no

Test guideline 4

Qualifier:

according to guideline

Guideline:

other: Japanese Ministry of Agriculture, Forestry and Fisheries (JMAFF), 12 Nohsan, Notification No. 8147, April 2011; including the most recent partial revisions.

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Reaction products of n-octanol and acrylic acid, first distillation pitch

EC Number:

938-925-5

Molecular formula:

not applicable, UVCB

IUPAC Name:

Reaction products of n-octanol and acrylic acid, first distillation pitch

Details on test material:

- Physical state: Light yellow viscous liquid
- Analytical purity: UVCB
- Expiration date of the lot/batch: May 11, 2013
- Stability under test conditions: Stable
- Storage condition of test material: At room temperature in the dark

Test animals / tissue source

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: Charles River Deutschland, Kisslegg, Germany.
- Age at study initiation: at least 6 weeks old.
- Weight at study initiation: at least 1.0 kg.
- 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 (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) and wooden sticks (Swedish aspen wood, Bioservices, Uden, The Netherlands).
- Water (e.g. ad libitum): Free access to tap water.
- Acclimation period: at least 5 days before start of treatment under laboratory conditions.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18 to 24°C.
- Humidity (%): 40 to 70%.
- Air changes (per hr): approximately 15 room air changes/hour.
- Photoperiod (hrs dark / hrs light): 12-hour light/12-hour dark cycle.

IN-LIFE DATES: From: April 23, 2012 To: May 10, 2012

Test system

Vehicle:

unchanged (no vehicle)

Controls:

other: The other eye 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:

24-hour

Observation period (in vivo):

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 DESING
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 two weeks 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

SCORING SYSTEM:

CORNEAL IRRITATION

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

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

IRIS
Normal ....................................................................................................................................... 0
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) ....................................................................................................... 1
No reaction to light, hemorrhage, gross destruction (any or all of these)....................................... 2

CONJUNCTIVAL IRRITATION

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

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

Discharge:
No discharge (may include small amounts observed in inner canthus of normal animals) ........... 0
Any amount different from normal and/or lacrimation ................................................................... 1
Discharge with moistening of the lids and hairs just adjacent to lids ............................................. 2
Discharge with moistening of the lids and hairs (considerable area around the eye) ................... 3
Where standard lighting was considered inadequate for observing minor effects, eye examinations were performed using an ophthalmic examination lamp.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

cornea opacity score

Basis:

animal: #1, 2, 3

Time point:

24/48/72 h

Score:

0

Max. score:

4

Remarks on result:

no indication of irritation

Results 2

Irritation parameter:

iris score

Basis:

animal: #1, 2, 3

Time point:

24/48/72 h

Score:

0

Max. score:

2

Remarks on result:

no indication of irritation

Results 3

Irritation parameter:

conjunctivae score

Basis:

animal: #1, 2, 3

Time point:

24/48/72 h

Score:

0.33

Max. score:

3

Reversibility:

fully reversible within: 48h

Results 4

Irritation parameter:

chemosis score

Basis:

animal: #1, 2, 3

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

fully reversible within: 24 h

Irritant / corrosive response data:

Irritation:
Instillation of approximately 0.1 mL of the test substancee into one eye of each of three rabbits resulted in irritation of the conjunctivae, which consisted of redness, chemosis and discharge. The irritation had completely resolved within 48 hours in all animals.
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.
Corrosion:
There was no evidence of ocular corrosion.

Other effects:

Coloration / Remnants:
No staining of (peri) ocular tissues by the test substance was observed and no test substance remnants were seen.
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

Table 1. Individual eye irritation scores.

Animal	Time after dosing	Cornea			Iris	Conjunctivae			Comments
		Opacity (0-4)	Area (0-4)	Fluor area (%)^2	(0-2)	Redness (0-3)	Chemosis (0-4)	Discharge (0-3)
263^1	1 hour	0	0	0	0	1	1	1	-
	24 hours	0	0		0	1	0	0	-
	48 hours	0	0		0	0	0	0	-
	72 hours	0	0		0	0	0	0	-
279	1 hour	0	0	0	0	1	1	1	-
	24 hours	0	0		0	1	0	0	-
	48 hours	0	0		0	0	0	0	-
	72 hours	0	0		0	0	0	0	-
285	1 hour	0	0	0	0	1	1	1	-
	24 hours	0	0		0	1	0	0	-
	48 hours	0	0		0	0	0	0	-
	72 hours	0	0		0	0	0	0	-

 ¹Sentinel,²Green staining after fluorescein treatment (percentage of total corneal area).

 

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance does not have to be classified for eye irritation.

Executive summary:

Acute eye irritation/corrosion study with the test substance in the rabbit was determined according to OECD 405 guideline and EU B5 Method with GLP.

Single samples of 0.1 mL of the test substance were instilled into one eye of each of three rabbits. Observations were made 1, 24, 48 and 72 hours after instillation.

Instillation of the test substance resulted in irritation of the conjunctivae, which consisted of redness, chemosis and discharge. The irritation had completely resolved within 48 hours in all animals.

Based on these results, Reaction products of n-octanol and acrylic acid, first distillation pitch does not have to be classified and has no obligatory labelling requirement for eye irritation according to the:

- Globally Harmonized System of Classification and Labelling of Chemicals (GHS) of the United Nations (2011),

- Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures.