Alkyl-[2-(alkyl-substituted-phosphinoyl)-alkyl]-phosphinic acid

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

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:

according to guideline

Guideline:

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

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1200 (Acute Dermal Toxicity)

Deviations:

no

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Test material form:

solid: crystalline

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

- Full barrier in an air-conditioned room
- 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 (lot no. 0856)
- 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)
- The animals were kept individually in IVC cages, type III H, polysulphone cages on Altromin saw fibre bedding (lot no. 030512)
- Certificates of food, water and bedding are filed at BSL BIOSERVICE
- Adequate acclimatisation period (at least five days) under laboratory conditions

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

water

Details on dermal exposure:

Preparation of the Animals:
The animals were marked for individual identification by tail painting.
Approximately 24 hours before the test, the fur was removed from the dorsal area of the trunk using an electric clipper.
Care was taken to avoid abrading the skin, and only animals with healthy intact skin were used.
No less than 10% of the body surface was cleared for the application.
Prior to the application a detailed clinical observation was made of all animals.
Application:
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.

Doses:

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

No. of animals per sex per dose:

5 male and 5 female

Control animals:

not required

Details on study design:

Observation period:
All animals were observed for 14 days after dosing

Weight Assessment:
The animals were weighed on day 1 (prior to the application) and on days 8 and 15.

Clinical Examination:
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). As soon as symptoms were noticed they were recorded.
Thereafter, the animals were observed for clinical signs once daily until the end of the observation period. All abnormalities were recorded.
Cageside observations included changes in the skin and fur, eyes and mucous membranes. Also respiratory, circulatory,
autonomic and central nervous systems and somatomotor activity and behaviour pattern were examined.
Attention was directed to observations of tremors, convulsions, salivation, diarrhoea, lethargy, sleep and coma.

Pathology:
At the end of the observation period the surviving animals were sacrificed with an overdosage of pentobarbital injected
intraperitoneally (Narcoren®, Merial) at the dosage of approximately 8 mL/kg bw. All animals were subjected to gross necropsy.
All gross pathological changes were recorded and in case of findings the tissues were preserved for a possible histopathological evaluation.
The preserved tissues of which no histopathological evaluation was made will be discarded 3 months after the release of the final report
unless otherwise agreed upon with the sponsor.

Evaluation of Results:
Individual reactions of each animal were recorded at each time of observation.
Toxic response data were recorded by sex and dose level.
Nature, severity and duration of clinical observations were described.
The body weight changes were summarised in a tabular form.
Necropsy findings were described.
On the basis of the test results, the test item may be classified in one of the following classes in conformity with the criteria
given in Annex VI to Commission Directive 2001/59/EC:
• Very toxic
Substances and preparations shall be classified as very toxic, and assigned the symbol “T+” and indication of danger “very toxic”
in accordance with the criteria specified below:
R27 Very toxic in contact with skin
- LD50 dermal, rat or rabbit: <= 50 mg/kg
• Toxic
Substances and preparations shall be classified as toxic, and assigned the symbol “T” and indication of danger “toxic”
in accordance with the criteria specified below. Risk phrases shall be assigned in accordance with the following criteria:
R24 Toxic in contact with skin
- LD50 dermal, rat or rabbit: 50 < LD50 <= 400 mg/kg
• Harmful
Substances and preparations shall be classified as harmful, and assigned the symbol “Xn” and indication of danger “harmful”
in accordance with the criteria specified below. Risk phrases shall be assigned in accordance with the following criteria:
R21 Harmful in contact with skin
- LD50 dermal, rat or rabbit: 400 < LD50 <= 2000 mg/kg
On the basis of the test results, the following risk phrases may be assigned in conformity with the criteria
given in Annex I of Regulation (EC) 1272/2008:
Category 1: LD50 <= 50 mg/kg. DANGER. Skull and crossbones in diamond. Fatal in contact with skin.
Category 2: LD50 > 50 mg/kg <= 200 mg/kg. DANGER. Skull and crossbones in diamond. Fatal in contact with skin.
Category 3: LD50 > 200 mg/kg <= 1000 mg/kg. DANGER. Skull and crossbones in diamond. Toxic in contact with skin.
Category 4: LD50 > 1000 mg/kg <= 2000 mg/kg. WARNING. Exclamation point in diamond. Harmful in contact with skin.
On the basis of the test results, the following risk phrases may be assigned in conformity with the criteria
given in GHS - Globally Harmonized System of Classification and Labelling of Chemicals, third revised edition, July 2009:
Category 1: LD50 <= 50 mg/kg. DANGER. Skull and crossbones in diamond. Fatal in contact with skin.
Category 2: LD50 > 50 mg/kg <= 200 mg/kg. DANGER. Skull and crossbones in diamond. Fatal in contact with skin.
Category 3: LD50 > 200 mg/kg <= 1000 mg/kg. DANGER. Skull and crossbones in diamond. Toxic in contact with skin.
Category 4: LD50 > 1000 mg/kg <= 2000 mg/kg. WARNING. Exclamation point in diamond. Harmful in contact with skin.
Category 5: LD50 > 2000 mg/kg <= 5000 mg/kg. WARNING. No symbol. May be harmful in contact with skin.

Statistics:

According to OECD guidelines, the biological relevance of the results is the criterion for the interpretation of results,
a statistical evaluation of the results is not regarded as necessary.

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Mortality:

No mortality was observed

Clinical signs:

other: No treatment-related effects were observed.

Gross pathology:

No treatment-related effects were observed.

Other findings:

No erythema or oedema was observed. Eschar was observed in 3 of 5 male and 2 of 5 female animals.
Scratches were observed in 3 of 5 male and 4 of 5 female animals.
All signs of irritation were reversible within the observation period.

Applicant's summary and conclusion

Interpretation of results:

not classified

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

Under the test conditions single dermal application of the substance 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 substance / kg body weight.

Executive summary:

Under the test conditions single dermal application of the substance to rats at a dose of 2000 mg/kg body weight was associated with neither mortality nor signs of toxicity but signs of irritation. All signs of irritation were reversible within the observation period. The dermal LD50 was determined to be > 2000 mg substance / kg body weight.