N-alkylester of substituted diazo aryl amine

Endpoint summary

Description of key information

The test item did not cause any mortality or adverse effect at the limit dose of 2000 mg/kg body weight.

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:

21 January 2015 to 11 February 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Guideline study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes

Test type:

acute toxic class method

Limit test:

yes

Species:

rat

Strain:

Sprague-Dawley

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Italia S.p.A., Calco (Lecco), Italy
- Age at study initiation: approximately 8 weeks
- Weight at study initiation: 193 - 203 g at allocation
- Fasting period before study: Food was removed from the cages overnight prior to dosing and was made available approximately 4 hours after dosing.
- Housing: 3 animals/cage during the study; up to 5 animals/cage during acclimatisation in polisulphone solid bottomed cages with nesting material provided
into suitable bedding bags
- Diet (e.g. ad libitum): ad libitum throughout the study except for the fasting period prior to dosing
- Water (e.g. ad libitum): ad libitum
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 °C +/- 2 °C
- Humidity (%): 55% +/- 15%
- Air changes (per hr): Approximately 15 to 20 air changes per hour
- Photoperiod (hrs dark / hrs light): Artificial (fluorescent tubes), daily light/dark cycle of 12/12 hours

IN-LIFE DATES: From: 21 January 2015 (allocation of the animals to the first group) To: 11 February 2015 (last necropsy procedure)

Route of administration:

oral: gavage

Vehicle:

other: PEG 400 - water 1:1 v/v

Details on oral exposure:

VEHICLE
- Concentration in vehicle: 200 mg/mL

MAXIMUM DOSE VOLUME APPLIED: 10 mL/kg body weight

Doses:

2000 mg/kg body weight

No. of animals per sex per dose:

6

Control animals:

no

Details on study design:

Mortality and morbidity
Throughout the study all animals were checked twice daily.
Clinical signs
Animals were observed for clinical signs as indicated below:
– Day of dosing
Session 1: on dosing
Session 2: approximately 0.5 hour after dosing
Session 3: approximately 2 hours after dosing
Session 4: approximately 4 hours after dosing
– Daily thereafter for a total of 14 days

Body weight
All animals were weighed at allocation to the study (Day -1), on the day of dosing (Day 1) and on Days 2, 8 and 15.
Body weight change calculated for Days 2, 8 and 15 of the dosing phase was related to Day 1 of the phase.

All animals were sacrificed on Day 15 by carbon dioxide narcosis.

Necropsy was carried out on all animals (gross necropsy examination for both external and internal abnormalities, with particular attention to the
gastro-intestinal tract).

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality occurred in the first group of animals initially dosed at 2000 mg/kg body weight (Step 1) and in the second group of 3 females dosed at the same dose level (Step2).

Clinical signs:

No clinical signs were observed. Slight to marked green colouration of faeces, due to the colour of the substance, was observed on Days 2 or 3 of the study.

Body weight:

Changes in body weight observed during the study were within the expected range for this strain and age of animals.

Gross pathology:

No abnormalities were observed at necropsy examination performed on all animals dosed at 2000 mg/kg body weight at the end of the observation
period.

Interpretation of results:

not classified

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

These results indicate that the test item Disperse Blue CVG did not induce toxic effects in the rat following oral administration of a single dose at a level of 2000 mg/kg body weight. The lack of mortality demonstrates the acute toxicity expected (ATE) to be greater than 2000 mg/kg body weight.
European Directives concerning the classification, packaging and labelling of dangerous substances (Council Regulation (EC) No. 1272/2008 and
subsequent revisions) would indicate the following:
Classification: No category
Signal word: No signal word required
Hazard statement: No hazard statement required

Executive summary:

The acute toxicity of Disperse Blue CVG was investigated following a single oral administration to the Sprague Dawley rat followed by a 14-day observation period.

A first group of 3 female animals was initially dosed at 2000 mg/kg body weight (Step 1). No mortality occurred and no signs of toxicity were observed. Green coloration of faeces was noted. A second group of 3 female animals was then dosed at the same dose level (Step 2). No death occurred and no signs of toxicity were noted. Green coloration of faeces was observed.

Body weight changes recorded during the study were within the expected range for this strain and age of animals.

No abnormalities were observed at necropsy examination performed at the end of the observation period on animals of both groups.

These results indicate that the test item Disperse Blue CVG did not induce toxic effects in the rat following oral administration of a single dose at a level of 2000 mg/kg body weight. The lack of mortality demonstrates the acute toxicity expected (ATE) to be greater than 2000 mg/kg body weight.

European Directives concerning the classification, packaging and labelling of dangerous substances (Council Regulation (EC) No. 1272/2008 and subsequent revisions) would indicate the following:

Classification :No category

Signal word: No signal word required

Hazard statement: No hazard statement required

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Additional information

The acute toxicity of Disperse Blue CVG was investigated following a single oral administration to the Sprague Dawley rat followed by a 14-day observation period.

A first group of 3 female animals was initially dosed at 2000 mg/kg body weight (Step 1). No mortality occurred and no signs of toxicity were observed. Green coloration of faeces was noted. A second group of 3 female animals was then dosed at the same dose level (Step 2). No death occurred and no signs of toxicity were noted. Green coloration of faeces was observed.

Body weight changes recorded during the study were within the expected range for this strain and age of animals.

No abnormalities were observed at necropsy examination performed at the end of the observation period on animals of both groups.

These results indicate that the test item Disperse Blue CVG did not induce toxic effects in the rat following oral administration of a single dose at a level of 2000 mg/kg body weight. The lack of mortality demonstrates the acute toxicity expected (ATE) to be greater than 2000 mg/kg body weight.

The LD50 for oral administration is > 2000 mg/kg body weight in the female rat.

Justification for classification or non-classification

Classification :No category

Signal word: No signal word required

Hazard statement: No hazard statement required