Tetra-sodium/lithium 4,4'-bis-(8-amino-3,6-disulfonato-1-naphthol-2-ylazo)-3-methylazobenzene

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

January 9, 1990 - January 30, 1990

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: OECD Guideline 401 study, GLP study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1990

Report date:

1990

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 (Acute Toxicity (Oral))

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Tetra-sodium/lithium 4,4'-bis-(8-amino-3,6-disulfonato-1-naphthol-2-ylazo)-3-methylazobenzene

EC Number:

408-210-8

EC Name:

Tetra-sodium/lithium 4,4'-bis-(8-amino-3,6-disulfonato-1-naphthol-2-ylazo)-3-methylazobenzene

Cas Number:

124605-82-9

Molecular formula:

C33 H26 N8 O14 S4 .x Li .x Na

IUPAC Name:

dilithium(1+) disodium 5-amino-3-{2-[4-(2-{4-[2-(8-amino-1-hydroxy-3,6-disulfonatonaphthalen-2-yl)diazen-1-yl]-2-methylphenyl}diazen-1-yl)phenyl]diazen-1-yl}-4-hydroxynaphthalene-2,7-disulfonate

Details on test material:

- Physical state: powder
- Stability under test conditions: stable for at least 2 hours

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: BRL, Biological Research Laboratories Ltd., CH-4414 Fuellinsdorf
- Age at study initiation: males: 9 weeks, females: 11 weeks
- Weight at study initiation: males: 200 - 222 g, females: 164 - 183 g
- Fasting period before study: 12 to 18 hours (access to water was not interrupted)
- Housing: Groups of five in Makrolon type-3 cages with standard softwood bedding
- Diet: Pelleted standard Kliba 343, Batch 61/89 rat maintenance diet ("Kliba", Klingentalmuehle AG, CH-4303 Kaiseraugst) available ad libitum.
- Water: Community tap water from Itingen, available ad libitum.
- Acclimation period: One week under laboratory conditions, after veterinary examination.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22+/-3 °C
- Humidity (%): 40-70 %
- Air changes (per hr): 10-15 air changes per hour
- Photoperiod (hrs dark / hrs light): 12 hours artificial fluorescent light/12 hours dark, music/light period

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

other: bi-distilled water

Details on oral exposure:

MAXIMUM DOSE VOLUME APPLIED:
Application Volume/ kg body weight: 10 ml at 2000 mg/kg bw

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

5

Details on study design:

- Duration of observation period following administration: 15 days
- Frequency of observations: Four times during test day 1, and daily during days 2 - 15
- Frequency of weighing: Test days 1 (pre-administration), 8 and 15.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight

Statistics:

The LOGIT-Model could not be applied to the observed rates of death, toxicity was estimated without use of a statistical model.

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality occurred.

Clinical signs:

other: No clinical signs were observed.

Gross pathology:

Lungs: discoloration, dark red (5 animals).
Kidneys: discoloration, black (1 animal).
No macroscopical organ changes were observed.

Applicant's summary and conclusion

Interpretation of results:

practically nontoxic

Remarks:

Migrated information

Conclusions:

The acute oral toxicity of the test substance in rats of both sexes, observed over a period of 15 days, was estimated to be greater than 2000 mg/kg body weight.

Executive summary:

In an oral toxicity study according to OECD guideline 401, 5 male and 5 female rats were dosed once with the test article by gastric intubation at a dose level of 2000 mg/kg body weight and observed for 15 days. The vehicle used was bi-distilled water. There were no deaths and none of the animals showed clinical signs. All rats gained weight normally. The following organ findings were observed: discoloration of lungs (dark red) in five animals, discolored kidneys (black) in one animal. No macroscopical organ changes were observed. Under the conditions of this study, the LD50 is greater than 5000 mg/kg body weight in male and female rats when applied orally.