[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Data is from study report

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2016

Report date:

2016

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: OECD Guideline 402 (Acute Dermal Toxicity)

Principles of method if other than guideline:

The study was designed and conducted to determine the dermal reaction profile of [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl] trimethylammonium chloride in Sprague Dawley rats.

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride

EC Number:

269-944-0

EC Name:

[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride

Cas Number:

68391-32-2

Molecular formula:

ClN5O3

IUPAC Name:

8-[(4-amino-3-nitrophenyl)diazenyl]-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium chloride

Test material form:

solid: particulate/powder

Details on test material:

- Name of test material (as cited in study report): Basic brown 17
- Molecular formula (if other than submission substance): C19H20N5O3.Cl
- Molecular weight (if other than submission substance): 401.852 g/mol
- Smiles notation (if other than submission substance): CN{+}(C)(C)(.Cl{-})c1ccc2ccc(O)c(N=Nc3ccc(N)c(N(=O)=O)c3)c2c1
- InChl (if other than submission substance): 1S/C19H19N5O3.ClH/c1-24(2,3)14-7-4-12-5-9-18(25)19(15(12)11-14)22-21-13-6-8-16(20)17(10-13)23(26)27;/h4-11H,1-3H3,(H2-,20,21,22,25);1H
- Substance type: Organic
- Physical state: Solid

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source of test material: Sustainability Support Services (Europe) AB, Sweden
- Lot/batch No.of test material: A171
- Expiration date of the lot/batch: 14/9/2021
- Purity test date: No data

RADIOLABELLING INFORMATION (if applicable)
- Radiochemical purity: No data
- Specific activity: No data
- Locations of the label: No data
- Expiration date of radiochemical substance: No data

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Ambient Temperature
- Stability under test conditions: No data
- Solubility and stability of the test substance in the solvent/vehicle: No data
- Reactivity of the test substance with the solvent/vehicle of the cell culture medium: No data

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: Test item was moistened with distilled water before application.
- Preliminary purification step (if any):No data
- Final dilution of a dissolved solid, stock liquid or gel: No data
- Final preparation of a solid: No data

FORM AS APPLIED IN THE TEST (if different from that of starting material) : No data

OTHER SPECIFICS:
Safety Precautions: Safety precautions included use of protective clothing, gloves, masks and eye protection (glasses).

In vitro test system

Test system:

other: No data

Source species:

other: No data

Cell type:

other: No data

Cell source:

other: No data

Source strain:

other: No data

Details on animal used as source of test system:

No data

Justification for test system used:

No data

Vehicle:

other: No data

Details on test system:

No data

Control samples:

other: No data

Amount/concentration applied:

No data

Duration of treatment / exposure:

No data

Duration of post-treatment incubation (if applicable):

No data

Number of replicates:

No data

Test animals

Species:

rat

Strain:

Sprague-Dawley

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: National Institute of Biosciences, Pune.
- Age at study initiation: Young adult male and female rats aged between 6 – 9 weeks were used.
- Weight at study initiation: The weight ranges of approximately 219.6 to 262.5 grams at initiation of dosing were used.
Body weights at the start :
Male
Mean : 257.02 g (= 100 %)
Minimum : 251.5 g (- 2.15 %)
Maximum : 262.5 g (+ 2.13 %)
Total No. of animals : 5
Female
Mean : 225.00 g (= 100 %)
Minimum : 219.6 g (- 2.40 %)
Maximum : 232.7 g (+ 3.42 %)
Total No. of animals : 5
- Housing: The rats were individually housed in polycarbonate cages with paddy husk as bedding.
- Diet (e.g. ad libitum): Rodent feed supplied by the Nutrivet Life Sciences, Pune, was provided ad libitum from individual feeders.
- Water (e.g. ad libitum): Water was provided ad libitum from individual bottles attached to the cages. All water was from a local source and passed through the reverse osmosis membrane before use.
- Acclimation period: 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): Room temperature was maintained at 20.0 to 21.9 degree centigrade.
- Humidity (%): Room humidity was maintained at 56.1% to 58.7%.
- Air changes (per hr): The animal room was independently provided with at least ten to fifteen air changes per hour of 100% fresh air that had been passed through the HEPA filters.
- Photoperiod (hrs dark / hrs light): An artificial light and dark cycle of 12 hours each was provided to the room.

IN-LIFE DATES: From: To: No data

Test system

Type of coverage:

occlusive

Preparation of test site:

clipped

Vehicle:

unchanged (no vehicle)

Controls:

yes

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 2000 mg/kg bw
- Concentration (if solution): no

VEHICLE
- Amount(s) applied (volume or weight with unit):No data
- Concentration (if solution): No data
- Lot/batch no. (if required): No data
- Purity: No data

NEGATIVE CONTROL
- Amount(s) applied (volume or weight): No data
- Concentration (if solution): No data

POSITIVE CONTROL
- Amount(s) applied (volume or weight): No data
- Concentration (if solution): No data

Duration of treatment / exposure:

24 hrs.

Observation period:

14 days

Number of animals:

10 (5/sex).

Details on study design:

TEST SITE
- Area of exposure: Dorsal surface and sides from scapular to pelvic area.
- % coverage: Approximately 10% of the total body surface area.
- Type of wrap if used: Porous gauze dressing and non-irritating tape.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): Distilled water was used to remove residual test item.

OBSERVATION TIME POINTS
(indicate if minutes, hours or days) : Observations were conducted at 10, 30, 60 minutes, 2, 4 and 6 hours on the day of dosing and once daily thereafter for 14 day.

SCORING SYSTEM: Draize Method.

Results and discussion

In vivo

Results

Irritation parameter:

overall irritation score

Basis:

animal: 1 - 10

Time point:

other: 0 - 14 d

Score:

0

Reversibility:

other: no data

Remarks on result:

no indication of irritation

Irritant / corrosive response data:

Overall result:
Sex : Male
Group I -
Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.

Sex : Female
Group I -
Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.

Other effects:

Clinical Signs of Toxicity and Mortality
Sex : Male
Group I -
Animal treated at the dose level of 2000 mg/kg body weight did not result in any signs of toxicity during the study period of 14 days. All animals survived through the study period of 14 days.

Sex : Female
Group I -
Animal treated at the dose level of 2000 mg/kg body weight did not result in any signs of toxicity during the study period of 14 days. All animals survived through the study period of 14 days.

Body Weight
Sex : Male
Group I (2000 mg/kg) - Percent body weight gain after 7 days and 14 days was found to be 9.60% and 18.68% respectively.

Sex : Female
Group I (2000 mg/kg) - Percent body weight gain after 7 days and 14 days was found to be 5.03% and 10.54% respectively.

Gross Pathological Findings
Gross pathological examination did not reveal any abnormalities in animals from 2000 mg/kg dose group.

Any other information on results incl. tables

Table No. I

 

Summary of Evaluation of Dermal Reaction

Test System : Sprague Dawley Rat

Sex : Male 

Group No.	Dose mg/kg	Dermal Reaction	Total Number of Animals	Animal Nos.	Period of signs in days  From - to	Mortality
I	2000	No dermal reaction observed	5	1 - 5	Day 0 - Day 14	0/5

 

 

Sex : Female

 

Group No.	Dose mg/kg	Dermal Reaction	Total Number of Animals	Animal Nos.	Period of signs in days  From - to	Mortality
I	2000	No dermal reaction observed	5	6 - 10	Day 0 - Day 14	0/5

 

Table No. II

 

Individual Animal - Evaluation of Dermal Reaction

Test System : Sprague Dawley Rat

Sex : Male  

Group : I

Dose  : 2000 mg/kg body weight

Animal	Dermal	D A Y S
No.	Reaction	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14
1	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
2	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
3	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
4	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
5	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

 

Sex : Female  

Group : I

Dose  : 2000 mg/kg body weight

Animal	Dermal	D A Y S
No.	Reaction	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14
6	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
7	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
8	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
9	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
10	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Applicant's summary and conclusion

Interpretation of results:

other: Not irritating

Remarks:

on the basis of EU Criteria

Conclusions:

From the study, it can be concluded that the test substance ‘[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl] trimethylammonium chloride’ is nonirritant to the skin of Sprague Dawley rats when applied to the shorn skin of 5 male and 5 female animals at the tested dose level of 2000 mg/kg body weight. Also the erythema and edema score of rats was calculated as 0. Thus it can be concluded that the substance [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl] trimethylammonium chloride can be classified under nonirritant category.

Executive summary:

The study was designed and conducted to determine the dermal reaction profile of [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl] trimethylammonium chloride in Sprague Dawley rats. The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days. Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment. From the study, it can be concluded that the test substance ‘[8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl] trimethylammonium chloride’ is nonirritant to the skin of Sprague Dawley rats when applied to the shorn skin of 5 male and 5 female animals at the tested dose level of 2000 mg/kg body weight. Also the erythema and edema score of rats was calculated as 0. Thus it can be concluded that the substance [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2-naphthyl] trimethylammonium chloride can be classified under nonirritant category.