Disodium 6-(4,6-dichloro-1,3,5-triazin-2-ylamino)-1-hydroxy-2-(4-(2-(sulfonatooxy)ethylsulfonyl)phenylazo)naphthalene-3-sulfonate

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From Aug. 21, 1997 to Oct. 09, 1997

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1997

Report date:

1997

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method B.3 (Acute Toxicity (Dermal))

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

no

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Disodium 6-(4,6-dichloro-1,3,5-triazin-2-ylamino)-1-hydroxy-2-(4-(2-(sulfonatooxy)ethylsulfonyl)phenylazo)naphthalene-3-sulfonate

EC Number:

404-600-7

EC Name:

Disodium 6-(4,6-dichloro-1,3,5-triazin-2-ylamino)-1-hydroxy-2-(4-(2-(sulfonatooxy)ethylsulfonyl)phenylazo)naphthalene-3-sulfonate

Cas Number:

129009-88-7

Molecular formula:

Hill formula: C21H14Cl2N6Na2O10S3 CAS formula: C21H16Cl2N6O10S3.2Na

IUPAC Name:

disodium 7-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-hydroxy-3-(2-{4-[2-(sulfonatooxy)ethanesulfonyl]phenyl}diazen-1-yl)naphthalene-2-sulfonate

Test material form:

solid: particulate/powder

Details on test material:

- Name of test material (as cited in study report): Reaktiv-Orange FD 19969 FW

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: HMR, Kastengrund, SPF breeding colony
- Age at study initiation: 7 wk (males); 8 wk (females)
- Weight at study initiation: 195± 12 g (males); 191± 8 g (females)
- Housing: MacroIon cages (type 3) on soft wood granulate, one animal/cage
- Diet (e.g. ad libitum): ssnif R/M-H (V 1534), ad libitum
- Water (e.g. ad libitum): Tap water in plastic bottles, ad libitum
- Acclimation period: At least 1 d

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22±3 °C
- Humidity (%): 50±20 °C
- Photoperiod (hrs dark / hrs light): 12 h dark/12 h light

IN-LIFE DATES: From: Aug. 21, 1997 To: Sep. 04, 1997

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

water

Remarks:

0.7 mL deionized water

Details on dermal exposure:

TEST SITE
- Area of exposure: Dorsal skin of the area (30 cm2)
- Type of wrap if used: Elastic plaster bandage fixed around the animal's body (Fixomull and Elastoplast, 8 cm in width)

REMOVAL OF TEST SUBSTANCE
- Washing (if done): Yes, with warm water
- Time after start of exposure: 24 h

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 g
- Concentration (if solution): 0.5 g of test substance was moistened with 0.7 mL deionized water
- Constant volume or concentration used: yes
- For solids, paste formed: yes

VEHICLE
- Amount(s) applied (volume or weight with unit): 0.7 mL deionized water.

Duration of exposure:

24 h

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

5/sex/dose

Control animals:

not required

Details on study design:

- Duration of observation period following administration: 14 d
- Frequency of observations and weighing: Symptoms were recorded twice every day (in the morning and in the afternoon), on weekends and public holidays only once. The animals were weighed weekly.
- Necropsy of survivors performed: yes; animals were killed by carbon dioxide asphyxiation, dissected and examined for macroscopically visible changes.
- Other examinations performed: Clinical signs and body weight

Results and discussion

Preliminary study:

Not applicable

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

no indication of skin irritation up to the relevant limit dose level

Mortality:

No mortalities occurred during the whole study.

Clinical signs:

other: No symptoms were observed after administration of 2000 mg/kg body weight. The skin of the animals was sporadically discolored light orange up to Day 8 of the study.

Gross pathology:

No gross pathological changes were observed

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

Under the test conditions, the acute dermal LD50 of the test substance was found to be >2,000 mg/kg in Wistar rats

Executive summary:

A study was conducted to assess the acute dermal toxicity of test substance in Wistar rats according EU Method B.3. and OECD guideline 402 in compliance with GLP.

Following a range-finding study, a group of 10 rats (five males and five females) were applied 0.5 g of test substance moistened with 0.7 mL deionised water, at a dose level of 2,000 mg/kg. Following the 24 h exposure period, animals were observed for mortality, skin response and general behavior for 14 d and were then killed and subjected to gross pathological examination.

Neither deaths nor symptoms occurred in the study. All animals appeared normal throughout the 24 h exposure period and the 14 d post-exposure observation period. Development of body weight was not impaired. The skin of the animals was sporadically discolored light orange up to Day 8 of the study. The animals killed at the end of the observation period showed no macroscopically visible changes.

Under the test conditions, the acute dermal LD50 of the test substance was found to be >2,000 mg/kg in Wistar rats.