2-hydroxyethyl methacrylate

Eye irritation

Administrative data

Endpoint:

eye irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1978

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: Appraisal of the safety of Chemicals in foods, drugs and cosmetics by staff of the Division of Pharmacology, FDA acc. to Draize

Principles of method if other than guideline:

Appraisal of the safety of Chemicals in foods, drugs and cosmetics by staff of the Division of Pharmacology, FDA acc. to Draize (1959)

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

2-hydroxyethyl methacrylate

EC Number:

212-782-2

EC Name:

2-hydroxyethyl methacrylate

Cas Number:

868-77-9

Molecular formula:

C6H10O3

IUPAC Name:

2-hydroxyethyl methacrylate

Test material form:

liquid

Specific details on test material used for the study:

Supplier: Röhm GmbH, Darmstadt, Germany
Purity: not specified in the report.
Company data in the years iof the report: 0,071 bis 0,91 % methacrylic acid

Test animals / tissue source

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: no data
- Age at study initiation: no data
- Weight at study initiation: 2.4 to 2.6 kg
- Housing: individual cages
- Diet : standard diet (Höing 222)
- Water ad libitum:


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18 °C
- Humidity (%): 50-60
- Photoperiod hrs light): 12

Test system

Vehicle:

unchanged (no vehicle)

Controls:

other: the right ear of the test animals remained untreated as control

Amount / concentration applied:

TEST MATERIAL
- Amount applied (volume): 0.1 ml
- Concentration: undiluted

Observation period (in vivo):

24, 48, 72 h, 4, 5, 7 days

Number of animals or in vitro replicates:

6

Details on study design:

REMOVAL OF TEST SUBSTANCE
- Washing: no washing:


SCORING SYSTEM:
Scoring system for the evaluation of ear lesions Scores

1. Cornea
A. Opacity - Grade of opacity (the most opac area will be used for evaluation)

No opacity 0
Motteled or diffuse opacity
(details if iris good visible) 1
Slightly differentiated opac areas,
details of iris slightly ambiguous 2
Opac areas, no details of iris are visible,
size of pupil hardly visible 3
Opacity, iris unvisible 4

B. Size of involved total area
¼ or less but not zero 1
More than ¼, but less than ½ 2
Larger than ½ but less than ¾ 3
Larger than ¾ up to total area 4
A x B x 5 total maximum number = 80

2. Iris
A. Evaluation
Normal 0
Increasing wrinkle formation (washy trabecules )
Blood overfilling, swelling, vascular dilatation at
the edge of cornea (when one or more symptoms
occur) iris shows still light reaction (delayed
reaction is deemed to be positive) 1
No reaction against light, bleeding, changes in
iris structure (one or more symptoms) 2

A x 5 total maximum number =10

3. Conjunctiva
A. Redness
Vascular normal 0
Vascular definitely more than normal injected 1
More diffuse crimson colour, single vascular
difficult to identify 2
Diffuse flesh colour 3

B. Chemosis
No swelling 0
More than normal swelling (including nictitating membrane) 1
Definite swelling with lifting the lids 2
Swelling with semi-closed lids 3
Swelling that lids are more than semi-closed or totally
closed 4

C. Secretion
No secretion 0
Every increased secretion (not included the physiological
secretion at the inner canthus) 1
Secretion with moistening the lids and the
neighboring hairs 2
Secretion with wettening the lids and the neighboring
hairs largely beyond the eye 3

Total number (A+B+C) x 2 total maximum number = 20
The total number for the eye is the summation of the scores for cornea, iris and conjunctiva

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

cornea opacity score

Basis:

animal #1

Time point:

24/48/72 h

Score:

1.33

Max. score:

4

Reversibility:

fully reversible within: 7 days

Results 2

Irritation parameter:

cornea opacity score

Basis:

animal: # 2, '3, #4, #6

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 7 days

Results 3

Irritation parameter:

cornea opacity score

Basis:

animal #5

Time point:

24/48/72 h

Score:

2

Max. score:

4

Reversibility:

fully reversible within: 7 days

Results 4

Irritation parameter:

iris score

Basis:

animal: #1, #5

Time point:

24/48/72 h

Score:

1

Max. score:

2

Reversibility:

fully reversible within: 7 days

Results 5

Irritation parameter:

iris score

Basis:

animal: #2, #3, #4, #6

Time point:

24/48/72 h

Score:

0.66

Max. score:

2

Reversibility:

fully reversible within: 7 days

Results 6

Irritation parameter:

conjunctivae score

Basis:

animal #4

Time point:

24/48/72 h

Score:

1.33

Max. score:

3

Reversibility:

fully reversible within: 7 days

Results 7

Irritation parameter:

conjunctivae score

Basis:

animal: #2, #3

Time point:

24/48/72 h

Score:

1.66

Max. score:

3

Reversibility:

fully reversible within: 7 days

Results 8

Irritation parameter:

conjunctivae score

Basis:

animal #6

Time point:

24/48/72 h

Score:

2

Max. score:

3

Reversibility:

fully reversible within: 7 days

Results 9

Irritation parameter:

conjunctivae score

Basis:

animal: #1, #5

Time point:

24/48/72 h

Score:

3

Max. score:

3

Reversibility:

fully reversible within: 7 days

Results 10

Irritation parameter:

chemosis score

Basis:

animal: #2, #3, #4, #6

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 7 days

Results 11

Irritation parameter:

chemosis score

Basis:

animal #1

Time point:

24/48/72 h

Score:

1.66

Max. score:

4

Reversibility:

fully reversible within: 7 days

Results 12

Irritation parameter:

chemosis score

Basis:

animal #5

Time point:

24/48/72 h

Score:

2.33

Max. score:

4

Reversibility:

fully reversible within: 7 days

Irritant / corrosive response data:

HEMA produced in 6/6 animals a positive response of corneal opacity >= 1 calculated as the means scores following grading at 24, 48 and 72 hours which were fully reversible within 7 days in all animals. Mean scores of iritis, conjunctival redness and conjunctival edema were below the CLP classification criteria and were also fully reversible within 7 days in all animals.

Applicant's summary and conclusion

Interpretation of results:

Category 2B (mildly irritating to eyes) based on GHS criteria

Conclusions:

Classification acc. CLP citeria: : irritating to eyes, Category 2, H319
Classification acc. GHS citeria: : mildly irritating to eyes, Category 2B

Executive summary:

2 -Hydroxyethyl methacrylate was tested in an eye irritation test to rabbits according to the Appraisal of the safety of Chemicals in foods, drugs and cosmetics by staff of the Division of Pharmacology, FDA acc. to Draize (1959). 6 New Zealand White rabbits received 0.1 ml of the undiluted substance into the right eye. The eyes remaind unwashed. The eye reactions were observed after 24, 48, 72 hrs and 4, 5 and 7 days. The study was reevaluated according to UN-GHS criteria. 6/6 animals had opacity scores >= 1 which were reversible within 7 days. Based on this HEMA is classified acc. CLP regulation into Category 2 (H319) and acc. UN-GHS into Category 2B.