Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Read-across from supporting substance Substance: 5-ethyl-2-methylpyridine (MEP) CAS no.: 104-90-5 EC no.: 203-250-0 Pyridine, alkyl derivatives is a substance of Unknown or Variable Composition, Complex Reaction Products, or Biological Materials (UVCB, subtype 2). The substance is not a discrete chemical, but characterized by a variety of structures. The substance 2-ethyl-4-methylpyridine (CAS no. 26091-11-2) and its isomer 5-ethyl-2-methylpyridine (MEP, CAS no. 104-90-5) were selected as representative model structures. The read-across is based on the hypothesis that source and target substance have similar properties, because they share a common functional group, common precursors and the likelihood of common breakdown products via physical and biological processes, which result in structurally similar chemicals. Please see the attached read-across justification for details.

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1997

Materials and methods

Test guidelineopen allclose all
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method B.3 (Acute Toxicity (Dermal))
Deviations:
not specified
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Deviations:
not specified
GLP compliance:
not specified
Test type:
standard acute method
Limit test:
no

Test material

Constituent 1
Test material form:
gas under pressure: refrigerated liquefied gas
Details on test material:
- Name of test material: 5-ethyl-2-methyl-pyridine

Test animals

Species:
rabbit
Strain:
not specified
Sex:
not specified

Administration / exposure

Type of coverage:
not specified
Vehicle:
not specified
Control animals:
not specified

Results and discussion

Effect levels
Sex:
not specified
Dose descriptor:
LD50
Effect level:
1 000 mg/kg bw
Based on:
not specified

Applicant's summary and conclusion

Interpretation of results:
harmful
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
In an acute dermal toxicity study with rabbits a LD50 of 1000 mg/kg bw was determined.
Executive summary:

Determination of acute dermal toxicity was carried out with 5-ethyl-2-methylpyridine (MEP, CAS no.: 104-90-5, EC no.: 203-250-0). The read-across between the UVCB substance and the model constituent is justified. A study similar or equivalent to EU Method B.3 and OECD Guideline 402 (Acute Dermal Toxicity) was carried out. Rabbits were administered a single dermal dose. An LD50 of 1000 mg/kg bw was revealed.