4-amino-2-methylquinoline

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From May 11 to July 1, 2015.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Test method according to OECD Guideline 420, EU Method B.1 bis and GLP study.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2015

Report date:

2015

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 420 (Acute Oral Toxicity - Fixed Dose Method)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 bis (Acute Oral Toxicity - Fixed Dose Procedure)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

fixed dose procedure

Limit test:

no

Test material

Test material information

Constituent 1

Reference substance name:

4-amino-2-methylquinoline

EC Number:

229-604-4

EC Name:

4-amino-2-methylquinoline

Cas Number:

6628-04-2

Molecular formula:

C10H10N2

IUPAC Name:

4-amino-2-methylquinoline

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

- Name of test material (as cited in study report): 4-Aminoquinaldine.
- Chemical name: 4-amino-2-methylquinoline.
- Physical state: slightly yellow powder.
- Analytical purity: 98.1%
- Purity test date: April 13, 2015.
- Lot/batch No.: 83
- Expiration date of the lot/batch: April 2018.
- Storage condition of test material: 15-25ºC.

Test animals

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Experimental Medicine Centre, Medical University in Bialystok.
- Age at study initiation: 9 weeks old (300 mg/kg bw dose) and 10 weeks old (50 mg/kg bw dose).
- Weight at study initiation: 193.0 g (300 mg/kg bw dose) and 198.0 g (50 mg/kg bw dose), plus 4 animals whose average body weight was 187.5 g were assigned to the 50 mg/kg bw dose group.
- Fasting period before study: 19 hours.
- Housing: Plastic cages covered with wire bar lids. (58 x 37 x 21 cm). Preliminary experiment: 1 animal/cage. Main experiment: 4 animals/cage. UV-sterilized wood shavings were used as bedding.
- Diet (e.g. ad libitum): Ad libitum access to the “Murigran” standard granulated laboratory fodder (lot numbers: 3/15 and 4/15) produced by Wytwórnia Koncentaratów i Mieszanek Paszowych AGROPOL, Motycz.
- Water (e.g. ad libitum): Tap water ad libitum.
- Acclimation period: The animals were quarantined for 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19-26 ºC.
- Humidity (%): 40-80%
- Air changes (per hr): about 16 times/hour
- Photoperiod (hrs dark / hrs light): 12 hours light/12 hours dark.

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

CMC (carboxymethyl cellulose)

Remarks:

1%

Details on oral exposure:

VEHICLE
- Concentration in vehicle: 1 ml of suspension contained 10 mg of the test item.
- Amount of vehicle (if gavage): 0.5 mL/100 g bw

MAXIMUM DOSE VOLUME APPLIED: 1 mililiter.

DOSAGE PREPARATION (if unusual):The test item was carefully mixed with 1% carboxymethylcellulose. The test item (a suspensin oin 1% carboxymethylcellulose) in a volume of 0.5 mL/100 g. The suspension of the test item in 1% carboxymethylcellulose was prepared on the administration day (shortly before the administration).

CLASS METHOD (if applicable)
- Rationale for the selection of the starting dose: No previous data were available.

Doses:

50 and 300 mg/kg bw

No. of animals per sex per dose:

Preliminary study: 1 female per dose.
Main study: 4 additional females.

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days.
- Frequency of observations and weighing: Daily.
- Necropsy of survivors performed: yes.
- Other examinations performed: clinical signs, body weight, gross necropsy examinations.

Results and discussion

Preliminary study:

Following single administration of the test item at a dose of 300 mg/kg bw, the following signs of toxicity were observed: rounded back, wavering gait, slight and distinc decreases of locomotor activity, and tremors. The animal died during the 2nd hour after the administration of the test item.
Following single administration of the test item at a dose of 50 mg/kg bw, no signs of toxicity were stated.

Effect levels

Sex:

female

Dose descriptor:

LD50

Effect level:

> 50 mg/kg bw

Based on:

test mat.

Mortality:

All the animals survived the main experiment.

Clinical signs:

other: No signs of toxicity were stated.

Gross pathology:

The animals did not exhibit any pathological chagnes.

Any other information on results incl. tables

Table 1. Clinical signs - overall list.

Dose (mg/kg b.w.)	Day after administration	Number of living animals	Animal number
			1*	2	3	4	5
50	0 1	1 0	Signs, D -	-	-	-	-
30	0 1 2 3 4 5 6 7 8 9 10 11 12 13 14	5 5 5 5 5 5 5 5 5 5 5 5 5 5 5	NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC	NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC	NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC	NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC	NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

* the female from the preliminary experiment

NC=No Changes

Signs= Clinical signs

D=Death

Table 2. Body weights of the animals (g)

Dose (mg/kg b.w)	Animal number	Day of the experiment / Body weight (g)			Body weight gain (g) (0-14d)
		0	7	14
300	1*	193	-	-	-
50	1* 2 3 4 5	198 191 200 187 172	211 218 220 210 197	228 233 234 214 200	30 42 34 27 28

*the female from the preliminary experiment

Applicant's summary and conclusion

Interpretation of results:

Category 3 based on GHS criteria

Remarks:

Migrated information

Conclusions:

In the preliminary study, the animal treated at 300 mg/kg bw presented signs of toxicity and died. In the main study, no toxicity signs were stated at 50 mg/kg. The test substance is classified as Category III according to OECD GHS criteria.

Executive summary:

This study was performed according to OECD Guideline 420 and EU method B.1 (Fixed Dose Method) and following GLP. It intended to assess the toxicity properties of the test item when administered through oral route. It was performed on female Wistar rats. Since no previous data were available, a Preliminary experiment was performed with a dose of 300 mg/kg bw to 1 animal. The test item (a suspension in 1% carboxymethylcellulose) in a volume of 0.5 mL/100 g b.w. was administered with a metal stomach tube. The animal suffered signs of toxicity: rounded back, wavering gait, slight and distinct decreases of locomotor activity and tremors, and died 2h after the treatment. Consequently, the second female rat was treated with 50 mg/kg bw of the test item without manifesting any clinical sign of toxicity. In the main experiment 4 additional females were treated with 50 mg/kg bw. The animals were observed for 14 days and then euthanized for detailed gross examination. At 50 mg/kg no toxicity signs were stated. The animals survived the experiment. Gross examinations did not reveal any pathological changes. On the grounds of the study results, the test item can be classified as Category 3 according to GHS and to Regulation (EC) No. 1272/2008.