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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Remarks:
This study is included in a NONS registration and therefore has been evaluated by a relevant competent authority and is considered to be reliable.

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed
Year:
2005

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Annex V
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
3,3'-dicyclohexyl-1,1'-methylenebis(4,1-phenylene)diurea
EC Number:
406-370-3
EC Name:
3,3'-dicyclohexyl-1,1'-methylenebis(4,1-phenylene)diurea
Cas Number:
58890-25-8
Molecular formula:
C27H36N4O2
IUPAC Name:
3,3'-dicyclohexyl-1,1'-methylenebis(4,1-phenylene)diurea
Test material form:
solid: particulate/powder

Test animals

Species:
rabbit
Strain:
other: Japanese White

Test system

Type of coverage:
occlusive
Preparation of test site:
not specified
Vehicle:
other: Liquid paraffin
Controls:
not specified
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 500 mg

VEHICLE
- Other: Liquid paraffin
Duration of treatment / exposure:
4 hours
Observation period:
Not reported
Number of animals:
6
Details on study design:
Conducted according to guideline and GLP

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:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
erythema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
erythema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
erythema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
edema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
edema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritation parameter:
edema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
0
Reversibility:
not specified
Remarks on result:
other: Timepoint not specified, standard timepoint assumed
Irritant / corrosive response data:
None reported
Other effects:
None

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
Edema and erythema scores were 0 for all animals. Therefore, the test item is not classified for skin irritation.
Executive summary:

The skin irritancy potential of the test item was assessed using 500 mg of the test item. The study was conducted according to a standard guideline using Japanese white rabbits. The mean and max edema and erythema scores were 0 for all animals. No other effects were observed. Therefore, the test item is not classified for skin irritation.

The study is a GLP compliant, guideline study and is acceptable with restrictions for evaluation of this endpoint.