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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Endpoint:
skin sensitisation: in vivo (LLNA)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report date:
2008

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay)
Deviations:
no

Test material

In vivo test system

Test animals

Species:
mouse
Strain:
CBA
Sex:
female

Results and discussion

In vivo (LLNA)

Resultsopen allclose all
Parameter:
SI
Remarks on result:
other: see Remark
Remarks:
Concentration (% w/v) Stimulation index Result 0 1.0 - 10 1.1 negative 25 2.2 negative 50 1.9 negative
Parameter:
other: disintegrations per minute (DPM)
Remarks on result:
other: see Remark
Remarks:
Concentration (% w/v) Disintegrations per minute 0 4137.1 10 4562.3 25 9113.3 50 7877.1

Any other information on results incl. tables

No signs of irritation were observed after application of a 10%, 25% and 50% concentration of EEA-NH4.

3H-thymidine incorporation in the auricular lymph nodes in animals treated with a 10% concentration EEA-NH4 was similar to that in vehicle control animals, whereas3H‑thymidine incorporation was statistically significantly enhanced at 25% and 50% concentrations. Stimulation indices (SI’s) of 1.1, 2.2 and 1.9 were calculated in response to a 10%, 25% and 50% EEA-NH4 concentration respectively. Since the SI’s were lower than 3 at all concentrations the results indicated that EEA-NH4 should not be considered a skin sensitiser (a SI of 3 is the limiting value required for classification as a skin sensitiser).

Applicant's summary and conclusion