Copper chromite black spinel

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1987-09-01 to 1987-09-15

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Comparable to guideline study reliable with restrictions - the purity of the test material was missing in the study report. Minor deviations from the guideline: - in this study only males were given the test item. According to the guideline, after completion of the study in one sex one group of the other sex is dosed to establish that animals of this sex are not markedly more sensitive to the test substance. Where adequate information is available to demonstrate that the animals of the sex tested are markedly more sensitive, testing in animals of the other sex may be dispensed with. If males are more sensitive to the test item than females was not stated in the report, but since the LD50 for males lies above 10000 mg/kg it is assumed that the LD50 for the females is also above 2000 mg/kg and no testing of females is needed. - the acclimatisation period in this study was four days - the age of the rats was missing in the study report. Since the weight of the rats was about 200 g, it was assumed that the rats were young adults. - the administered test volume was not stated - information on temperature and relative humidity (holding conditions) were missing. - time of appearance and disappearance of clinical signs was not stated. In addition, the number of animals displaying signs of toxicity was not shown. - body weight should be determined at the day of administration and then weekly thereafter and at death. The body weight was determined at the day of administration and at the end of the study (Day 14).

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1987

Report date:

1987

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Version / remarks:

adopted 1987-02-24

Deviations:

yes

Remarks:

, please refer to "Rationale for reliability incl. deficiencies" above

GLP compliance:

no

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Copper chromite black spinel

EC Number:

269-053-7

EC Name:

Copper chromite black spinel

Cas Number:

68186-91-4

Molecular formula:

CuCr2O4

IUPAC Name:

Copper chromite black spinel

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

- Name of test material (as cited in study report): Black 1- Copper Chromite Lot #X7156
- Physical state: black coloured powder
- Storage condition of test material: stored at room temperature throughout the study in a large clear plastic jar with a black taped black lid.
No further information on the test substance was stated.

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Weight at study initiation: 181 to 216 grams on the day of treatment
- Fasting period before study: overnight prior to dosing food was denied
- Housing: the rats were housed in groups of five in stainless steel wire mesh suspension cages.
- Diet (ad libitum, except during the fasting period prior to dosing): animals were maintained on PURINA LABORATORY CHOW
- Water (ad libitum): tap water
- Acclimation period: at least four days prior to dosing

ENVIRONMENTAL CONDITIONS
- Photoperiod (hrs dark / hrs light): 12/12
No further information on the test material was stated.

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

water

Details on oral exposure:

DOSAGE PREPARATION: the test material was administered as a 50 % w/v formulation in distilled water.
No further information on the oral exposure was stated.

Doses:

10000 mg/kg

No. of animals per sex per dose:

10 males

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: animals were observed for gross signs of systemic toxicity and mortality several times during the day of dosing and once daily thereafter for 14 days.
- Necropsy of survivors performed: yes, at the end of the observation period, the rats were weighed, killed by carbon dioxide inhalation and given a gross necropsy.
No further information on the study design was stated.

Statistics:

not applicable

Results and discussion

Effect levels

Sex:

male

Dose descriptor:

LD50

Effect level:

> 10 000 mg/kg bw

Based on:

test mat.

Mortality:

No deaths occurred during the observation period.

Clinical signs:

other: Clinical changes observed during the observation period are as follows: 1. Mild depression 2. Faecal stains and loose mucoid faeces on cage paper

Gross pathology:

Gross necropsies performed at the end of the study revealed no gross pathological changes.

Applicant's summary and conclusion

Interpretation of results:

not classified

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

LD50 (male rats) > 10000 mg/kg
According to the EC-Commission directive 67/548/EEC and its subsequent amendments, the test substance is not classified as acute toxic via the oral route.
According to the EC-Regulation 1272/2008 and subsequent regulations, the test item is not classified as acute toxic via the oral route.