Carbohydrates and Sugars, hexitols, anhydro

Eye irritation

Administrative data

Endpoint:

eye irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

September 24, 2013

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Deviations:

no

Remarks:

no major deviations only minor deviations that have no impact on results

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Carbohydrates and Sugars, hexitols, anhydro

EC Number:

309-665-4

EC Name:

Carbohydrates and Sugars, hexitols, anhydro

Cas Number:

100683-96-3

IUPAC Name:

2-(1,2-dihydroxyethyl)oxolane-3,4-diol; hexahydrofuro[3,2-b]furan-3,6-diol

Test material form:

other: liquid

Test animals / tissue source

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

- Diet: SDS/DIETEX STANRAB (P) SQC feed was available ad libitum.
- Water:Drinking water was available ad libitum in polycarbonate bottles with a stainless steel nipple. A specimen of water is sent approximately every 6 months to Laboratoire de la Touraine - ZA n°1 du Papillon - Rue de l0Aviation - 37210 Parçay-Meslay - France, for analysis. The criteria for acceptable levels of contaminants in the water supplied were within the limits of the analytical specifications.
-Housing: Observation was performed at the time of delivery of the animals and daily during the acclimatisation period. Animals were housed individually in cages of standard size. These cages were placed in an air-conditioned (15- 21°C) animal house kept at between 45 % and 65 % relative humidity (except during the cleaning slot) in which non-recycled filtered air is changed approximately 10-15 times per hour. These parameters are continuously recorded using a computerised acquisition system. The artificial day/night cycle was 12 hours light and 12 hours darkness with light on at 7.30 a.m.
- IN-LIFE DATES: Start of the study (signature of the study plan by the Study Director): 07 May 2013, Start of the experimental period: 13 May 2013 , End of the experimental period: 24 May 2013

Test system

Vehicle:

unchanged (no vehicle)

Controls:

not required

Amount / concentration applied:

The following procedures were applied to avoid or minimize pain and distress in ocular safety testing procedures.

• 45 minutes prior to test item application, buprenorphine 0.01 mg/kg was administered by subcutaneous injection to provide a therapeutic level of systemic analgesia.
• 5 minutes prior to test item application, one drop of a topical ocular anaesthetic (oxybuprocaine chloryde or equivalent) was applied to each eye in order to avoid possible interference with the study. The eye of each animal which was not treated with a test article, but treated with topical
anaesthetics, served as a control.

0.1 mL of "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623 was introduced into the conjunctival sac of one eye of each of the animals. The conjunctival sac was opened by gently pulling the lower lid away from the eyeball. Eyelids were held closed for approximately 1 second in order to
avoid any loss of "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623. The non-treated eye was used as control. Following treatment, animals were kept for approximately one hour in a restraint cage, in order to prevent rubbing of the eye.
Removal of test item: Since the test item was not removed from the eye by a natural mechanism, then after 1 hour the eye was rinsed with 20 mL of saline.
Exposure of one animal: Without information on the test item and/or the active ingredient, a single animal test was considered in order to anticipate marked effects.
Exposure of two additional animals: Since no corrosive effect was observed after instillation of test item in the first animal, the irritant or negative response was confirmed using up to two additional animals.
The standard amount applied was not adjusted to body weight.

Duration of treatment / exposure:

1 hour

Observation period (in vivo):

Test animals were routinely evaluated for the entire duration of the study for clinical signs of pain and/or distress at least twice daily.

Examination of the eye: Lesions of the conjunctiva, iris and cornea were monitored by direct examination. One hour, 24 hours, 48 hours and 72 hours approximately after the instillation of "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623, all possible conjunctival, iris or corneal lesions were evaluated on the left or right eye of each animal.

Ocular lesions were graded using the following scoring system in accordance with the OECD Guideline
No. 405

Number of animals or in vitro replicates:

3 females

Details on study design:

Three animals are required for the complete test. The rabbit was chosen because of its acceptance as a predictor of irritant/corrosive
effects of chemicals in man and the recognition by regulatory authorities that this species is suitable for eye irritation studies.

The day of instillation was taken as the first study day D1. Following a pretreatment with a systemic analgesic and induction of appropriate topical anesthesia, "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623 was instilled once only.
Justification of the number of animals: The number of animals is the minimum number enabling an accurate assessment of the studied toxicological effect.
Examination after fluorescein instillation: Confirmation of the absence of corneal damage was carried out at predose, 24 hours, 48 hours or
72 hours by examination after instillation of a 0.5% aqueous solution of sodium fluorescein and rinsing with sterile and pyrogen free isotonic saline.
Corneal lesions seen after the instillation of fluorescein were graded using the following evaluation scale described below.
Individual body weight was taken at the beginning and at the end of the experiment.
Euthanasia of animals was performed by an overdose of sodium pentobarbital injected by the intravenous route.
No necropsy was performed at the end of the study.
Calculation of ocular primary irritation indices: Mean indices were calculated from results obtained for each rabbit by direct examination at times
24 hours, 48 hours and 72 hours. The surface area of corneal opacity was not taken into account in the calculation of mean index. For each parameter, mean of indices for each rabbit for the three times was noted (Mean index per parameter, per animal for the three times = Mi). The maximum theoretical score is 4 (chemosis), 3 (redness), 2 (iris lesions) and 4 (corneal lesions).
Criteria of classification, choice of symbol, indication of danger and risk phrase: "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623 was classified irritant or non-irritant on the basis of results obtained, in accordance with Council Directive No. 67/548/EEC and subsequent amendments.

Results and discussion

In vivo

Results

Irritation parameter:

conjunctivae score

Remarks:

redness of the conjunctivae

Basis:

animal #3

Score:

ca. 1

Max. score:

1

Reversibility:

not fully reversible within: 24h

Irritant / corrosive response data:

The application of the test item did not induce colouration of the application site and did not interfere with grading of any ocular lesion.
One hour after instillation, all animals had redness of the conjunctivae (score 1). There was no ocular lesion from 24 to 72 hours after instillation.
Mean index values were 0

Other effects:

There was no change in body weight gain between D1 and D4.

Any other information on results incl. tables

Acute eye lesions - Individual scores - test item - local observations

Clinical signs (range of scores; normal score)	Time	Animal
		1	2	3
Chemosis (0-4; 0)	T 1H	0	0	0
	T 24H	0	0	0
	T 48H	0	0	0
	T 72H	0	0	0
Lacrimation (0-3; 0)	T 1H	0	0	0
	T 24H	0	0	0
	T 48H	0	0	0
	T 72H	0	0	0
Redness (0-3; 0)	T 1H	1	1	1
	T 24H	0	0	0
	T 48H	0	0	0
	T 72H	0	0	0
Iris (0-2; 0)	T 1H	0	0	0
	T 24H	0	0	0
	T 48H	0	0	0
	T 72H	0	0	0
Cornea opacity (0-4; 0)	T 1H	0	0	0
	T 24H	0	0	0
	T 48H	0	0	0
	T 72H	0	0	0
Area of cornea involved (0-4; 0)	T 1H	0	0	0
	T 24H	0	0	0
	T 48H	0	0	0
	T 72H	0	0	0

Mean Index (M.I.)

Treatment	Animal number	Chemosis	Redness	Iris	Cornea
Test item	130410	0	0	0	0
Test item	130411	0	0	0	0
Test item	130412	0	0	0	0

 

Body weight (individual values)

Treatment	Animal number	D1	D4
Test item	130410	2.351	2.415
	130411	2.577	2.562
	130412	2.508	2.593

Results expressed in kg

D: day

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

Under the experimental conditions adopted, "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623 was found to be non irritant for the eye of the rabbit.
Classification according to Council Directive No. 67/548/EEC and subsequent amendments and CLP Regulation No. 1272/2008:
Symbol: none is required.
Indication of danger: none is appropriate.
Risk phrase: none is applicable.

Executive summary:

The aim of the study was to determine any irritant property and/or degree of corrosion of "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623 following a single ocular instillation in the rabbit in accordance with the General Requirements of OECD Guideline No. 405 (Oct 2012) and method B5 of Commission Directive No. 2004/73/EC (April 29, 2004) adapting to technical progress for the 29th time Council Directive No. 67/548/EEC and subsequent amendments and of Council Regulation No. 440/2008 (30th May 2008) and Regulation No. 1907/2006 (REACH).

Three animals were used for the study.

0.1 mL of test item was introduced into the conjunctival sac of the left or the right eye of each of the animals. The untreated eye served as a control. Any conjunctival, iris and corneal changes were evaluated approximately one hour, 24 hours, 48 hours, 72 hours after instillation. Mean indices were calculated from results obtained for each rabbit at times 24, 48 and 72 hours.

The application of the test item did not induce colouration of the application site and did not interfere with grading of any ocular lesion. One hour after instillation, all animals had redness of the conjunctivae (score 1). There was no ocular lesion from 24 to 72 hours after instillation. There was no ocular lesion from 24 to 72 hours after instillation. Mean index values were 0.

There was no change in body weight gain.

Under the experimental conditions adopted, "hydrate de carbone et sucres, hexitol, anhydro" LAB 4623 was found to be non irritant for the eye of the rabbit. Substance was not classificied according to Council Directive No. 67/548/EEC and subsequent amendments and CLP Regulation No. 1272/2008.