1,2-Bis[2-(1,1,2-trifluoro-2-heptafluoropropyloxy-ethylsulfany)-ethoxycarbonyl]-ethanesulfonate sodium salt

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

September 18, 2018 - November 6, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

2001

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)

Version / remarks:

2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

1,2-Bis[2-(1,1,2-trifluoro-2-heptafluoropropyloxy-ethylsulfany)-ethoxycarbonyl]-ethanesulfonate sodium salt

EC Number:

944-870-8

Molecular formula:

C18H14F20O9S3

IUPAC Name:

1,2-Bis[2-(1,1,2-trifluoro-2-heptafluoropropyloxy-ethylsulfany)-ethoxycarbonyl]-ethanesulfonate sodium salt

Test animals

Species:

rat

Strain:

Wistar

Remarks:

Crl:WI (Han)

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Wiga GmbH, Sulzfeld, German
- Age at study initiation: 9 weeks
- Weight at study initiation: The mean initial body weight at the start of study was 162 g (range from 150 to 174 g).
- Fasting period before study: Diet was withheld from about 17 to 20 hours before start of treatment until 4 hours after administration.
- Housing: group-housed in type IV Makrolon® cages with a shelter on softwood bedding material
- Diet: maintenance diet (VI534, ssniff Spezialdiaten GmbH, Germany) ad libitum
- Water: community water supply was offered ad libitum
- Acclimation period: 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 21.9 - 23.2
- Humidity (%): 42.6 -58.5
- Air changes (per hr): fully air-conditioned room
- Photoperiod (hrs dark / hrs light): no information

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

other: 0.25% aqueous hydroxypropylcellulose

Details on oral exposure:

VEHICLE
- Amount of vehicle: 0.25% aqueous hydroxypropylcellulose (Methocel® K4M Premium solution, 2.5 g/L distilled water)
- Justification for choice of vehicle: This vehicle was well tolerated and established as standard vehicle.

MAXIMUM DOSE VOLUME APPLIED: 10 mL/kg

DOSAGE PREPARATION: Appropriate amounts of the test item were suspended in the vehicle using a spatula, a mini shaker, Ultra-Turrax device and a magnetic stirrer. The test item preparation was administered within less than 1 hour after preparation.

CLASS METHOD
- Rationale for the selection of the starting dose: Due to the chemical properties of the test item, mortality was not expected at the highest starting dose of 2000 mg/kg. Therefore, the treatment was started with 2000 mg/kg in three female rats and continued with further three females at 2000 mg/kg.

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: On the day of treatment, each animal was observed for mortality and for symptoms of intoxication at scheduled intervals according to the record sheets. On the following days, the rats were examined once daily. Symptoms were recorded individually for each animal. All animals were weighed before treatment (day 1) and on day 2, 4, 6, 8, 11, 13 and 15.
- Necropsy of survivors performed: yes

Statistics:

None

Results and discussion

Preliminary study:

Prior to this study, an in vitro skin irritation test was performed with the test item in which no irritating potential was detected (Gado, 2018).

Effect levels

Key result

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality was seen.

Clinical signs:

other: No clinical signs of toxicity were observed.

Gross pathology:

No organ alterations were identified during the gross pathological examination

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The median lethal oral dose (LD50) is higher than 2000 mg/kg bw.

Executive summary:

The objective of the present study was to identify potential toxic effects of the test item after single oral administration to rats in a stepwise procedure according to OECD TG 423. The treatment was started with 2000 mg/kg body weight in 3 female rats and continued with further 3 females treated with 2000 mg/kg. Mortality and clinical signs were monitored for at least 6 hours after administration and then daily. All animals were weighed before treatment (day 1) and on days 2, 4, 6, 8, 11, 13, and 15. At the end of the observation period, all surviving rats were sacrificed and subjected to a detailed necropsy. No mortality occurred during the course of this study. No clinical signs of toxicity were observed. The body weight development was inconspicuous throughout the study. The gross pathological examination revealed no organ alterations.

The test item has no acute toxic potential under the conditions of the present study, and the LD50 value is higher than 2000 mg/kg bw after single oral administration in female rats.