Registration Dossier
Registration Dossier
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EC number: 235-115-7 | CAS number: 12069-89-5
Acute Toxicity: dermal
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
- Study period:
- 1990-06-13 to 1990-11-01
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study. Sodium molybdate is used as read-across partner to Dimolybdenum carbide.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 990
- Report date:
- 1990
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 402 (Acute Dermal Toxicity)
- Deviations:
- no
- GLP compliance:
- yes
- Test type:
- standard acute method
- Limit test:
- yes
Test material
- Reference substance name:
- Sodium molybdate
- IUPAC Name:
- Sodium molybdate
- Reference substance name:
- 7631-95-0
- Cas Number:
- 7631-95-0
- IUPAC Name:
- 7631-95-0
- Test material form:
- solid: particulate/powder
- Remarks:
- migrated information: powder
- Details on test material:
- - Name of test material (as cited in study report): Sodium molybdate
- Physical state: white crystalline powder
- Analytical purity: 46.03 % Molybdenum, 18.69% sodium
- Purity test date: 1990-06-06
- Storage condition of test material: storage at room temperature
Constituent 1
Constituent 2
Test animals
- Species:
- rat
- Strain:
- other: Crl:CD (SD)
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Charles River UK, Kent, England
- Age at study initiation: seven to ten weeks
- Weight at study initiation: 216 to 262 g
- Housing: individually in metal cages
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: 12 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22-24 °C
- Humidity (%): 60%
- Air changes (per hr): 15
- Photoperiod (hrs dark / hrs light): 12/12
Administration / exposure
- Type of coverage:
- occlusive
- Vehicle:
- water
- Details on dermal exposure:
- TEST SITE
- Area of exposure: dorso-lumbar region
- % coverage: 10% of the total body surface ( 50 x 50 mm)
- Type of wrap if used: gauze, which was held in place with an impermeable dressing encircled firmlay around the trunk
REMOVAL OF TEST SUBSTANCE
- Washing (if done): yes, with 30-40 °C warm water
- Time after start of exposure: 24h
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 1.12 ml/kg
- Constant volume or concentration used: yes - Duration of exposure:
- 24h
- Doses:
- 2000 mg/kg bw
- No. of animals per sex per dose:
- 5
- Control animals:
- no
- Details on study design:
- - Duration of observation period following administration:
14 days
- Frequency of observations:
on the day of treatment at frequent intervals for a period of 4 hours. On the subsequent days two times per day. Clinical signs were recorded at each observation. The treated areas of skin were examined daily for signs of dermal irritation and were assessed according to the following scoring systempresented in table 1
- Frequency of weighing:
on day the day of treatment, on day 8 and day 15
- Necropsy of survivors performed: yes
Results and discussion
- Preliminary study:
- N:A:
Effect levels
- Sex:
- male/female
- Dose descriptor:
- LD0
- Effect level:
- 2 000 mg/kg bw
- Based on:
- test mat.
- Mortality:
- There were no deaths following a single dermal dose of 2000 mg/kg bw
- Clinical signs:
- other: There were no signs of systemic reaction to treatment
- Gross pathology:
- Terminal autopsy revelaed no macroscopic abnormalities
- Other findings:
- N.A.
Applicant's summary and conclusion
- Interpretation of results:
- practically nontoxic
- Remarks:
- Criteria used for interpretation of results: EU
- Conclusions:
- In conclusion, the dermal LD50 value in rats after treatment with Sodium molybdate was established to exceed 2000 mg/kg body weight.
- Executive summary:
In an acute dermal toxicity study (OECD 402, limit test), a group of young adult Crl:CD (SD) rats (5 males and 5 females) was dermally exposed to Sodium molybdate in water for 24 hours to approximately 10% of body surface area at 2000 mg/kg bw. Animals were observed for 14 days. No mortality occurred. There were no treatment related clinical signs, necropsy findings or changes in body weight. The dermal LD50 value of Sodium molybdate in both female and male Crl:CD (SD) rats was established to exceed 2000 mg/kg body weight.
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