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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Remarks:
pre-GLP, pre-OECD guideline

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1981
Report date:
1981

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Principles of method if other than guideline:
BASF-test (application on intact skin, for 24 hours, under occlusion)
GLP compliance:
no
Test type:
standard acute method
Limit test:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
1-methylimidazole
EC Number:
210-484-7
EC Name:
1-methylimidazole
Cas Number:
616-47-7
Molecular formula:
C4H6N2
IUPAC Name:
1-methyl-1H-imidazole
Test material form:
liquid
Details on test material:
Substance name: 1-methylimidazol
Substance number: 79/527

Test animals

Species:
rabbit
Strain:
Vienna White
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: M .GAUKLER, 6050 Offenbach
- Weight at study initiation: males 3.1 kg, femalses 3.0 kg
- Diet: Ssniff K, standard diet for rabbits and guinea pigs (Fa. INTERMAST GMBH, Soe) and Ovator Solikanin (Fa. Muskator-Werke, Düsseldorf) ad libitum
- Water: ad libitum

Administration / exposure

Type of coverage:
occlusive
Vehicle:
unchanged (no vehicle)
Details on dermal exposure:
TEST SITE
- Area of exposure: 110 cm2 (clipped skin)
- Type of wrap if used: inert foil fixed with a adhesive bandage

REMOVAL OF TEST SUBSTANCE
- Washing: with warm water or a water/Lutrol solution
- Time after start of exposure: 24 h
Duration of exposure:
24 h
Doses:
250, 400 and 640 mg/kg bw
No. of animals per sex per dose:
3 (250 and 640 mg/kg bw) and 6 (400 mg/kg bw)
Control animals:
no
Details on study design:
- Duration of observation period following administration: 15 days
- Frequency of observations and weighing: 1 h and 1, 2, 7 and 15 days
- Necropsy of survivors performed: yes

Results and discussion

Effect levels
Sex:
male/female
Dose descriptor:
LD50
Effect level:
400 - 640 mg/kg bw
Based on:
test mat.
Mortality:
250 mg/kg bw: no mortality occurred
400 mg/kg bw: 2/6 males and 0/6 females
640 mg/kg bw: 1/3 males and 3/3 females
Clinical signs:
other: Resorptive intoxications symptoms: apathy, accelerated breathing, spasms, salivation, excess lacrimation, narrowed pupils Local irritation symptoms: Besides obvious redness of the skin and edema at the end of the observation period necrotic changes in th
Gross pathology:
Animals which died during the study: dilatation of the heart and hyperemia in the lungs. In the animals which were sacrified at the end of the study no effects were observed.
Other findings:
Skin findings: firstly, erythema and edema. During the observation period necrosis was observed.

Applicant's summary and conclusion

Interpretation of results:
Category 3 based on GHS criteria