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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Acute Toxicity: oral

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Administrative data

Endpoint:
acute toxicity: oral
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Comparable to guideline with acceptable restrictions: limited reporting

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Acute oral toxicity of inorganic cobalt compounds in rats.
Author:
Speijers GJA, Krajnc EI, Berkvens JM, van Logten MJ
Year:
1982
Bibliographic source:
Fd Chem Toxic 20: 311
Reference Type:
review article or handbook
Title:
Indirect food additives and polymers
Author:
Sheftel VO
Year:
2000
Bibliographic source:
Migration and Toxicology, Lewis Publishers, Boca Raton, Florida

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
Deviations:
yes
Remarks:
(10 day observation)
GLP compliance:
no
Test type:
standard acute method

Test material

Constituent 1
Reference substance name:
6147-53-1
EC Number:
612-153-6
Cas Number:
6147-53-1
IUPAC Name:
6147-53-1
Details on test material:
- Name of test material (as cited in study report): Cobalt(II) acetate tetrahydrate
- Molecular formula (if other than submission substance): Co(CH3COO)2 4H2O
- Molecular weight (if other than submission substance): 249.1 g/mol
- Physical state: solid
- Analytical purity: 99 %
- Other: Apart from chemically combined water the test substance is identical to CAS 71-48-7

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: animal breeding unit, National Institute of Public Health, Bilthoven, the Netherlands
- Weight at study initiation: approx. 100 g

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
water
Doses:
250; 375; 560; 840; 1260 mg/kg bw
No. of animals per sex per dose:
5
Control animals:
no
Details on study design:
- Duration of observation period following administration: 10 days
- Frequency of observations: rectal temperature: 1.5, 24 and 48 hours after treatment
- Necropsy of survivors performed: no
- Other examinations performed: clinical signs, other: rectal temperature
Statistics:
The oral LD50 values of male and female rats combined were calculated according to the method of 'maximum likelihood ' according to Finney (1971).

Results and discussion

Effect levels
Sex:
male/female
Dose descriptor:
LD50
Effect level:
503 mg/kg bw
Remarks on result:
other: LD50 for anhydrous compound (calculated). LD50 for compound tested was 708 (569-880) mg/kg bw (95 % confidence interval).
Mortality:
Individual values not reported.
Clinical signs:
highest dose level: sedation, diarrhea;
respiratory disturbances
time- and dose-related drop in body temperature of 2.5 to 7.5°C
Gross pathology:
hemorrhages and distrophic changes in the liver, kidney and heart

Any other information on results incl. tables

LD50 calculated for Cobalt(II) ion = 168 mg/kg bw.

Applicant's summary and conclusion