Bis(dodecylthio)dioctylstannane

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Not specified

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Cross-reference

Reason / purpose for cross-reference:

other: read-across target

Reference

Endpoint:

acute toxicity: dermal

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study conducted on read-across material

Justification for type of information:

Read-across to DOTE (Dioctyltin bis(2-ethylhexyl thioglycolate)) (CAS 15571-58-1), see attached justification.

Reason / purpose for cross-reference:

read-across source

Key result

Sex:

male/female

Dose descriptor:

LD0

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: no mortality

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1992

Report date:

1992

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

Test material information

Constituent 1

Reference substance name:

Dioctyltin bis(2-EHMA) [CAS No. 15571-58-1]:Octyltin tris(2-EHMA) [CAS No. 27107-89-7] (mixture 90:10%)

IUPAC Name:

Dioctyltin bis(2-EHMA) [CAS No. 15571-58-1]:Octyltin tris(2-EHMA) [CAS No. 27107-89-7] (mixture 90:10%)

Details on test material:

Dioctyltin bis(2-EHMA) [CAS No. 15571-58-1]:Octyltin tris(2-EHMA) [CAS No. 27107-89-7] (mixture 90:10%)

Test animals

Species:

rat

Strain:

other: Tif:RAIf (SPF)

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: no data
- Age at study initiation: no data
- Weight at study initiation: 221 - 261 g
- Fasting period before study: no data
- Housing: individually
- Diet (e.g. ad libitum): not precised, ad libitum
- Water (e.g. ad libitum): not precised, ad libitum
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 ± 2°c
- Humidity (%): 55 ± 10%
- Air changes (per hr): no data
- Photoperiod (hrs dark / hrs light): 12 hours light/day

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Remarks:

none

Details on dermal exposure:

The dose volume applied was 2 mL/kg bw.

Duration of exposure:

24 hours

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

10 (5 males, 5 females)

Control animals:

no

Details on study design:

Prior to exposure, an area on the back of each test animal (~ >=10% of body surface) was shaved.
After 24 hours, the exposed skin was cleaned and the area of application was observed for 14 days.
Body weights were recorded on days 0 (prior to dosing), 7, and 14. Animals were observed once or twice daily for clinical signs of toxicity and mortality over the exposure period. Animals were sacrificed and necropsied at death or at the end of the exposure period, whichever came first.

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD0

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: no mortality

Mortality:

No mortality was observed over the course of this study. 
Due to the lack of observed mortality, the 14-day acute dermal LD50s of the test substance were reported as:
LD50 (males) = >2000 mg/kg bw
LD50 (females) = >2000 mg/kg bw
LD50 (both sexes) = >2000 mg/kg bw

Clinical signs:

On the day of application, all test animals (both sexes) exhibited slight piloerection. On days 1 and 2 post-application, all animals (both sexes) exhibited erythema at the application site. All clinical symptoms of toxicity disappeared by day 3 post-application.

Gross pathology:

No test material-related gross organ changes were observed at necropsy.

Applicant's summary and conclusion

Interpretation of results:

other: Not classified in accordance with EU Criteria

Conclusions:

Under the conditions of this study, the acute dermal toxicity LD50 (rat) of the test material was > 2000 mg/kg bw (both sexes).

Executive summary:

The acute dermal toxicity of the test material to rats was investigated in accordance with the standardised guideline OECD 402, under GLP conditions.

The test was carried out with a mixture of DOT(2 -EHMA) and Octyltin tris(2-EHMA) (90:10 % w/w).

The test dose was 2000 mg/kg bw; the dose volume applied was 2  mL/kg bw.  After 24 hours, the exposed skin was cleaned and the area of  application was observed for 14 days.

Due to the lack of observed mortality, the 14-day acute dermal LD50s of  the test substance were reported as: LD50 (males) > 2000 mg/kg bw LD50 (females) > 2000 mg/kg bw LD50 (both sexes) > 2000 mg/kg bw.

Under the conditions of this study, the acute dermal toxicity LD50 (rat) of the test material was > 2000 mg/kg bw (both sexes).