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Diss Factsheets

Toxicological information

Skin sensitisation

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Administrative data

Endpoint:
skin sensitisation: in vivo (non-LLNA)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: OECD Guideline Study performed under GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 406 (Skin Sensitisation)
GLP compliance:
yes
Type of study:
Buehler test
Justification for non-LLNA method:
available data was used which included a non-LLNA method.

Test material

Constituent 1
Chemical structure
Reference substance name:
Esterification products of glycerol with docosanoic acid, icosanedioic acid and 16-methylheptadecanoic acid
EC Number:
942-166-5
Cas Number:
922708-02-9
Molecular formula:
not applicable
IUPAC Name:
Esterification products of glycerol with docosanoic acid, icosanedioic acid and 16-methylheptadecanoic acid
Constituent 2
Reference substance name:
Glyceryl Behenate/isostearate/Eicosadioate
IUPAC Name:
Glyceryl Behenate/isostearate/Eicosadioate
Test material form:
solid: pellets
Details on test material:
- Name of test material (as cited in study report): Nomcort SG
- Substance type: organic
- Physical state: solid
- Analytical purity: not stated
- Lot/batch No.: L060725
- Expiration date of the lot/batch: July 25 2009
- Stability under test conditions: not stated
- Storage condition of test material: room temperature, air tight

In vivo test system

Test animals

Species:
guinea pig
Strain:
Hartley
Sex:
male
Details on test animals and environmental conditions:
TEST ANIMALS
- Source: Japan SLC, Inc., 3371-8 Kotoh-cho, Hamamatsu, Shizuoka Prefecture, 431-1103 Japan
- Age at study initiation: 5 weeks
- Weight at study initiation: 343-397 g
- Housing: individual
- Diet: standard, ad libitum
- Water: filtered and sterilitzed drinking water, ad libitum
- Acclimation period: 10 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 16.6 - 23.3
- Humidity (%): 38.2 - 63.8
- Air changes (per hr): 10 - 15
- Photoperiod (hrs dark / hrs light): 12 / 12

Study design: in vivo (non-LLNA)

Inductionopen allclose all
Route:
epicutaneous, occlusive
Vehicle:
unchanged (no vehicle)
Concentration / amount:
100 % Test substance
Challengeopen allclose all
Route:
epicutaneous, occlusive
Vehicle:
unchanged (no vehicle)
Concentration / amount:
100 % Test substance
No. of animals per dose:
20 in test group, 10 in control
Details on study design:
RANGE FINDING TESTS: performed
- tested concentrations: 100%, 50%, 25%, 12.5% 6.25%, 3.13%
- vehicle: olive oil

MAIN STUDY
A. INDUCTION EXPOSURE
- No. of exposures: 3
- Exposure period: 6 hours
- Test groups: 1
- Control group: 1
- Site: dorsal area
- Frequency of applications: Day 1, Day 7 and Day 14

B. CHALLENGE EXPOSURE
- No. of exposures: 1
- Day(s) of challenge: 28
- Exposure period: 6 hours
- Test groups: 1
- Control group: 1
- Site: left and right flank
- Concentrations: 100 % Test substance
- Evaluation (hr after challenge): 24 and 48 hours
Challenge controls:
olive oil
Positive control substance(s):
yes
Remarks:
1-Chloro-2,4-Dinitrobenzene

Results and discussion

Positive control results:
clearly positive reactions were noted. The positive control is thus assessed valid.

In vivo (non-LLNA)

Resultsopen allclose all
Key result
Reading:
1st reading
Hours after challenge:
24
Group:
test chemical
Dose level:
100%
No. with + reactions:
0
Total no. in group:
20
Clinical observations:
none
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 24.0. Group: test group. Dose level: 100%. No with. + reactions: 0.0. Total no. in groups: 20.0. Clinical observations: none.
Key result
Reading:
2nd reading
Hours after challenge:
48
Group:
test chemical
Dose level:
100 %
No. with + reactions:
0
Total no. in group:
20
Clinical observations:
none
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: test group. Dose level: 100 %. No with. + reactions: 0.0. Total no. in groups: 20.0. Clinical observations: none.
Reading:
1st reading
Hours after challenge:
24
Group:
negative control
Dose level:
0%
No. with + reactions:
0
Total no. in group:
10
Clinical observations:
none
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 24.0. Group: negative control. Dose level: 0%. No with. + reactions: 0.0. Total no. in groups: 10.0. Clinical observations: none.
Reading:
2nd reading
Hours after challenge:
48
Group:
negative control
Dose level:
0%
No. with + reactions:
0
Total no. in group:
10
Clinical observations:
none
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: negative control. Dose level: 0%. No with. + reactions: 0.0. Total no. in groups: 10.0. Clinical observations: none.
Reading:
1st reading
Hours after challenge:
24
Group:
positive control
Dose level:
1 % CDNB
No. with + reactions:
10
Total no. in group:
10
Clinical observations:
Magnusson & Kligman grading score
Reading:
2nd reading
Hours after challenge:
48
Group:
positive control
Dose level:
1 % CDNB
No. with + reactions:
10
Total no. in group:
10
Clinical observations:
Magnusson & Kligman grading score

Applicant's summary and conclusion

Interpretation of results:
not sensitising
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
According to the results obtained in this study, it was concluded that Nomcort SG is not a skin sensitizer under the conditions of this study.
Executive summary:

This study was designed to evaluate the skin sensitization of Nomcort SG using the Buehler test protocol. The test groups consisted of test substance group (20 animals) and control group (10 animals).

In the first, second and third induction for the test substance group, 100% test substance was held in contact with thee skin by an occlusive dressing for 6 hours. In two weeks, the flanks in the left and right were challenged with 100% test substance and olive oil, respectively, which were occlusively dressed for 6 hours.

In the first, second and third induction for the control group, olive oil was held in contact with the skin by an occlusive dressing for 6 hours. In two weeks, the left and right flanks were challenged with 100% test substance and olive oil, respectively, which were occlusively dressed for 6 hours.

As a result of the study, there were no skin reactions from any challenge sites on the test substance group and control group.

Abnormal clinical signs and body weight changes by the test substance were not observed in all animals during the observation period.