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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:
1991
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1991
Report date:
1991

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Trimethoxyvinylsilane
EC Number:
220-449-8
EC Name:
Trimethoxyvinylsilane
Cas Number:
2768-02-7
Molecular formula:
C5H12O3Si
IUPAC Name:
trimethoxy(vinyl)silane
Test material form:
liquid

Test animals / tissue source

Species:
rabbit
Strain:
New Zealand White
Details on test animals or tissues and environmental conditions:
TEST ANIMALS

- Source: Hoechst AG, Kastengrund

- Age at study initiation: 3-5 months

- Weight at study initiation: 2.2-3.9 kg

- Housing: Individually caged

- Diet: Altromin 2123 rabbit feed (GmbH), ad libitum

- Water: ad libitum



ENVIRONMENTAL CONDITIONS

- Temperature (°C): 18 (± 3)

- Humidity (%): 55 (±20)

- Air changes (per hr): The report states that the room was air-conditioned.

- Photoperiod (hrs dark / hrs light): 12/12

Test system

Vehicle:
unchanged (no vehicle)
Controls:
other: The untreated eye served as a control
Amount / concentration applied:
TEST MATERIAL

- Amount(s) applied (volume or weight with unit): 0.1ml

- Concentration (if solution): undiluted


Duration of treatment / exposure:
24 hour(s)
Observation period (in vivo):
1, 24, 48, 72 hours
Number of animals or in vitro replicates:
3
Details on study design:
REMOVAL OF TEST SUBSTANCE

- Washing (if done): Yes, with a saline solution at 37C.

- Time after start of exposure: 24 h


SCORING SYSTEM: The Draize scale


TOOL USED TO ASSESS SCORE: fluorescein

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
cornea opacity score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
cornea opacity score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
cornea opacity score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritant / corrosive response data:
The conjunctiva of the animals showed marked hyperaemia and redness. Slight conjunctival swelling was evident. Irritation was only observed 30 - 60 minutes post application; all effects were reversible within 1 day.
Other effects:
None reported.

Any other information on results incl. tables

Table 1: Irritant/corrosive response data for each animal at each observation time up to removal of each animal from the test

Score at time point / Reversibility

Cornea

Iris

Conjunctivae

Chemosis

Max. score: 4

Max. score: 2

Max. score: 3

Max. score: 4

60 min

0/0/0

0/0/0 

2/1/2 

1/1/0 

24 h

 0/0/0

 0/0/0

0/0/0 

0/0/0 

48 h

 0/0/0

 0/0/0

 0/0/0

 0/0/0

72 h

 0/0/0

 0/0/0

 0/0/0

 0/0/0

Average 24h, 48h, 72h

 0

0

0

Reversibility*)

 -

Average time (unit) for reversion

 

 

 24h

24h 

 *) Reversibility: c. = completely reversible; n.c. = not completely reversible; n. = not reversible

 

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
In the in vivo eye irritation study, conducted according to OECD Test Guideline 405 and in compliance with GLP, the test material, trimethoxy(vinyl)silane, was concluded to be not irritating to eyes.

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