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Diss Factsheets

Toxicological information

Skin irritation / corrosion

Currently viewing:

Administrative data

Endpoint:
skin irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 May 2001 - 23 July 2001
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2001
Report date:
2001

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Guidance on Safety Assessment of New Cosmetics (Japan Cosmetic Industry Association, technical materials No.92, 1991
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl)oxy]trisiloxane
EC Number:
241-867-7
EC Name:
1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl)oxy]trisiloxane
Cas Number:
17928-28-8
Molecular formula:
C10H30O3Si4
IUPAC Name:
2,2,4,6,6-pentamethyl-4-[(trimethylsilyl)oxy]-3,5-dioxa-2,4,6-trisilaheptane
Test material form:
solid - liquid: suspension

Test animals

Species:
rabbit
Strain:
other: Japanese White
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Oriental Bio Service Kanto Co., Ltd.
- Age at study initiation: 8-10 weeks
- Weight at study initiation: 1.9 - 2.15 kg
- Housing: Animals were housed individually in aluminium cages
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: 4 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 +/- 3
- Humidity (%): 55 +/-15
- Air changes (per hr): minimum 10
- Photoperiod (hrs dark / hrs light): 12/12

Test system

Type of coverage:
occlusive
Preparation of test site:
other: intact and abraded skins, clipped of fur
Vehicle:
other: olive oil
Controls:
no
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 mL
- Concentration (if solution): 90% and 50% solution

VEHICLE
- Lot/batch no. (if required): 32264
Duration of treatment / exposure:
24 hours
Observation period:
72 hours
Number of animals:
6
Details on study design:
TEST SITE
- Area of exposure: On the back of rabbits previously clipped of fur, 4 application sites were set in two symmetrically left and right. Of the 4 application sites, 2 served as intact skin and the other 2 as abraded skin. 0.5 mL of 90% and 50% test substance/olive oil solutions were uniformly spread on 2.5x2.5 cm patches, which were then applied to 2 intact and 2 abraded skins, respectively.

- % coverage:
- Type of wrap if used: Each patch was covered with adhesive elastic bandage and the whole application area was covered with gauze, which was occluded by 'Silky Tex' and surgical tape.

SCORING SYSTEM: Draize

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #4
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
edema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, intact skin
Irritation parameter:
erythema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 90% solution, abraded skin
Irritation parameter:
erythema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritation parameter:
edema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
other: 50% solution, abraded skin
Irritant / corrosive response data:
In any intact and abraded skins treated with 90% test substance solution, no skin reactions were observed in any animals at any observation time points of 1, 24, 48 and 72 hours after removal of the patches. In any intact and abraded skins treated with 50% test substance solution, no skin reactions were similarly observed in any animals at any observation time points.
Other effects:
No clinical signs were observed in any animals throughout the observation period. The body weights of all animals increased satisfactorily throughout the observation period.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
The test substance was found not to be irritating, in response to 50% and 90% solution applied onto intact and abraded skin of rabbits. The study was equivalent to current OECD guideline, but not conducted in compliance with GLP.