Quino[2,3-b]acridine-6,7,13,14(5H,12H)-tetrone

Endpoint summary

Description of key information

No mortality and no significant clinical signs were observed in female rats treated with the limit dose of 2000 mg/kg bw.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP and OECD guideline compliant study

Qualifier:

according to guideline

Guideline:

OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)

Version / remarks:

(December 17, 2001)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

(Bioassay, Labor für biologische Analytik GmbH, Heidelberg)

Test type:

acute toxic class method

Limit test:

yes

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Wiga GmbH, Sulzfeld, Germany
- Age at study initiation: about 8-12 weeks
- Weight at study initiation:
- Fasting period before study: Feed was withdrawn from the animals at least 16 hours before administration, but water was available ad libitum.
- Housing: single housing in Makrolon cages, type III
- Diet: VRF1(P); SDS Special Diets Services, Altrip, Germany
- Water: tap water ad libitum
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22°C ± 3°C
- Humidity (%): 30 – 70%
- Air changes (per hr): approx. 10
- Photoperiod (hrs dark / hrs light): 12 h / 12 h

Route of administration:

oral: gavage

Vehicle:

other: 0.5% Carboxymethylcellulose in water

Details on oral exposure:

MAXIMUM DOSE VOLUME APPLIED: 10 mL/kg bw

CLASS METHOD (if applicable)
- Rationale for the selection of the starting dose: The structure does not specifically indicate a hazard.

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

6

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Individual body weights shortly before administration (day 0), weekly thereafter and on the last day of observation. Additionally, at day of death in animals that died or were sacrificed moribund starting with study day 1. Recording of clinical signs several times on the day of administration, and at least once daily thereafter each workday for the individual animals. A check for any dead or moribund animals was made at least once each workday.
- Necropsy of survivors performed: yes

Statistics:

Calculations were performed using Microsoft Excel 2003 and checked with a calculator.

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: No mortality was observed.

Mortality:

None

Clinical signs:

other: Piloerection was observed in all animals during the first two days after dosing.

Gross pathology:

No adverse effects

Interpretation of results:

practically nontoxic

Remarks:

Migrated information Criteria used for interpretation of results: EU

Executive summary:

No mortality and no significant signs of toxicity was observed in female rats at the limit dose of 2000 mg/kg bw.

Endpoint conclusion

Endpoint conclusion:

no study available

Dose descriptor:

discriminating dose

Value:

2 000 mg/kg bw

Quality of whole database:

Valid without restriction

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Endpoint conclusion

Endpoint conclusion:

no study available

Justification for classification or non-classification

Dangerous Substance Directive (67/548/EEC)

The available studies are considered reliable and suitable for classification purposes under 67/548/EEC. As a result the substance is not considered to be classified for acute oral or dermal or inhalation toxicity under Directive 67/548/EEC, as amended for the 31st time in Directive2009/2/EG.

Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008

The available experimental test data are reliable and suitable for classification purposes under Regulation 1272/2008. As a result the substance is not considered to be classified for acute oral or dermal or inhalation toxicity under Regulation (EC) No. 1272/2008, as amended for the fifth time in Directive EC 944/2013.