Tetrakis(diethyldithiocarbamato-S,S')tellurium

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1986

Report date:

1986

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Tetrakis(diethyldithiocarbamato-S,S')tellurium

EC Number:

244-121-9

EC Name:

Tetrakis(diethyldithiocarbamato-S,S')tellurium

Cas Number:

20941-65-5

Molecular formula:

C20H40N4S8Te

IUPAC Name:

N2,N2,N6,N6,N6,N6,N9,N9-octaethyl-1λ³,3,5λ³,5λ³,7,7,8λ³,10-octathia-4λ⁸-telluradispiro[3.3⁴.3⁴.3⁴]trideca-1,5,5,8-tetraene-2,6,6,9-tetramine

Test material form:

solid

Specific details on test material used for the study:

- Name of the test item (as cited in study report): Tellurium diethyldithiocarbamate
- Batch No.: MT-5D 494
- Appearance: Yellow, powder

Test animals

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Froxfield Rabbits, Petersfield, Hampshire, England
- Weight at study initiation: 2.0-3.0 kg
- Age at study initiation: 9-13 weeks
- Housing: The rabbits were individually housed in metal cages with perforated floors.
- Diet: SDS, Standard Rabbit Diet (ad libitum)
- Water: tap water (ad libitum)

ENVIRONMENT
- Temperature: 19 °C
- Humidity: 30-70%
- Air changes (per hr): 19
- Photoperiod (hrs dark / hrs light): 12 / 12

Test system

Type of coverage:

semiocclusive

Preparation of test site:

clipped

Vehicle:

physiological saline

Controls:

no

Amount / concentration applied:

0.5 g

Duration of treatment / exposure:

24 hours

Observation period:

Examination of the treated skin sites was made approximately 30 minutes and 24, 48, 72 and 96 hours after removal of the patches.

Number of animals:

Six female rabbits

Details on study design:

Approximately 24 hours prior to application of the test substance, hair was removed with electric clippers from the dorso-lumbar region of each rabbit exposing an area of skin approximately 10 cm square. Immediately prior to application of the test substance, two areas of skin approximately 2.5 cm square on the right side of the spine were abraded using the tip of a scalpel blade to make minor incisions through the stratum corneum. These were not deep enough to disturb the dermis or cause bleeding. Two similar sites on the left side remained intact. A 0.5 g amount of the test substance was applied under a 2.5 cm square gauze pad moistened with 0.5 ml saline to two intact and two abraded skin sites on each animal. The treatment sites were occluded with "Elastoplast" elastic adhesive dressing for approximately 24 hours. "Elizabethan collars" were placed on each animal in order to prevent the animal from disturbing the test sites. The animals were not restrained during thee exposure period and were returned to their cages. At the end of the exposure period the semi-occlusive dressing and gauze pads were removed and the treatment sites wiped to remove any residual test substance.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Results 2

Irritation parameter:

edema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritant / corrosive response data:

None of the animals showed any observable response to treatment throughout the 5-day observation period.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met