Alcohols, C16-18 (even numbered, C18-unsatd.), ethoxylated, and alcohols C20-22 (even numbered), sulfates, ammonium salts

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012 - 2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study in accordance with EU method B.3.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

no

Test guideline 2

Qualifier:

equivalent or similar to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Alcohols, C16-18 (even numbered, C18-unsatd.), ethoxylated, and alcohols C20-22 (even numbered), sulfates, ammonium salts

EC Number:

938-445-6

Molecular formula:

C16H37NO4S - C34H72NO12S

IUPAC Name:

Alcohols, C16-18 (even numbered, C18-unsatd.), ethoxylated, and alcohols C20-22 (even numbered), sulfates, ammonium salts

Test material form:

solid: compact

Details on test material:

- Name of test material (as cited in study report): DE07_2012_001_PLSW
- Physical state: solid
- Lot/Batch No. PU20740016, PU20740019
- Expiration date of lot/batch: 14/03/2014
- Storage condition of test materilal: common room light, room temperature

Specific details on test material used for the study:

- Name of test material (as cited in study report): DE07_2012_001_PLSW
- Substance type: Alkylsulfate/alkylethersulfate
- Chemical name: Alcohols, C16-18 (even numbered, C18-unsatd.), ethoxylated, and alcohols C20-22 (even numbered), sulfates, ammonium salts
- CAS: n/a
- Physical state: ivory paste-like solid at 20 °C
- Batch No.: PU20740016, PU20740019
- Purity: 100 % (UVCB)
- Storage condition of test material: Room temperature, protected from light
- Stability: stable under test conditions

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

Test animals:
Species/strain: healthy rats, WISTAR rats Crl: WI(Han) (full barrier)
Source: Charles River, 97633 Sulzfeld, Germany
Sex: male and female The female animals were non-pregnant and nulliparous.
Number of animals: 5 male and 5 female
Age: at the beginning of the study: males: 9 weeks old, females: 13 weeks old
Body weight: on the day of administration: males: 231 – 252 g; females: 200 – 220 g.

Housing and Feeding Conditions:

- Temperature: 22 +-3 °C
- Relative humidity: 55 +-10%
- Artificial light, sequence being 12 hours light, 12 hours dark
- Air change: 10 x / hour
- Free access to Altromin 1324 maintenance diet for rats and mice
- Free access to tap water, sulphur acidified to a pH value of approximately 2.8 (drinking water, municipal residue control, microbiological controls at regular intervals)

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

water

Details on dermal exposure:

The test item was applied at a single dose, uniformly over an area which was approximately 10% of the total body surface.
The test item was held in contact with the skin by a dressing throughout a 24-hour period. The dressing consisted of a gauze-dressing and non-irritating tape and was fixed with an additional dressing in a suitable manner

Duration of exposure:

The test item was held in contact with the skin throughout a 24-hour period. At the end of the exposure period the residual test item was removed using aqua ad injectionem.

Doses:

The test item was applied at a single dose of 2000 mg/kg bw to each animal.

No. of animals per sex per dose:

5 male and 5 female

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- A careful clinical examination was made several times on the day of dosing (at least once during the first 30 minutes and with special attention given during the first 4 hours post-dose). The animals were weighed on day 1 (prior to the application) and on days 8 and 15.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, gross necropsy

Statistics:

Not applicable

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

Under the conditions of the present study, single dermal application of the test item to rats at a dose of 2000 mg/kg body weight was associated with with neither mortality nor signs of toxicity.

Clinical signs:

The test item showed no signs of acute dermal toxicity but signs of dermal irritation after a single dose application.

Body weight:

A slight weight loss was recorded for 1 out of 5 female animals during the first week, but all of the female animals showed weight gain during the second week. The effects on weight development might be secondary to the dressing, and toxicological relevance of this finding cannot clearly be concluded. The male animals showed weight gain during the first and the second week of the observation.

Gross pathology:

No specific gross pathological changes were recorded for any animal.

Other findings:

Not applicable

Applicant's summary and conclusion

Interpretation of results:

Category 5 based on GHS criteria

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

Under the conditions of the present study, single dermal application of the test item to rats at a dose of 2000 mg/kg body weight was associated with neither mortality nor signs of toxicity but signs of irritation. The dermal LD50 was determined to be > 2000 mg / kg body weight.

Executive summary:

Introduction:

A study was performed to assess the acute dermal toxicity of the test item in the Wistar strain rat. The method was designed to meet the requirements of the following:

- OECD Guidelines for Testing of Chemicals No 402 “Acute Dermal Toxicity” (adopted 24 February 1987)

- Method B.3 Acute Toxicity (Dermal) of Commission Regulation (EC) No. 440/2008

 

Method:

A group of ten animals (five males and five females) was given a single, 24-hour, semi-occluded dermal application of the test material to intact skin at a dose level of 2000 mg/kg bodyweight. Clinical signs and bodyweight development were monitored during the study. All animals were subjected to gross necropsy.

 

Mortality:

There were no deaths.

 

Clinical Observations:

There were no signs of systemic toxicity.

 

Dermal Irritation:

The test item showed signs of irritation. Erythema grade 1 but no oedema was observed in all animals. Desquamation and scratches were also observed in all animals. Eschar was observed in 1 of 5 female animals.

All signs of irritation were reversible within the observation period in all except one female animal.

 

Bodyweight:

A slight weight loss was recorded for 1 out of 5 female animals during the first week, but all of the female animals showed weight gain during the second week. The effects on weight development might be secondary to the dressing, and toxicological relevance of this finding cannot clearly be concluded. The male animals showed weight gain during the first and the second week of the observation.

 

Necropsy:

No abnormalities were noted at necropsy.

Conclusion:

The acute dermal medial lethal dose (LD50) of the test material in the Wistar strain rat was found to be greater than 2000 mg/kg bodyweight.