Y-513

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 June - 02 July 2008

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study was performed according to OECD and EC guidelines and according to GLP principles.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2008

Report date:

2008

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: particulate/powder

Remarks:

migrated information: powder

Details on test material:

- Name of test material (as cited in study report): Y-513
- Purity test date: no data
- Lot/batch No.: F-1570
- Expiration date of the lot/batch: 19 February 2013
- Stability under test conditions: stable
- Storage condition of test material: At room temperature in the dark

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Deutschland, Sulzfeld, Germany
- Age at study initiation: approx. 8 weeks old
- Weight at study initiation: males around 247-262 g, females around 167-177 g
- Fasting period before study: not applicable
- Housing: Individually housed in labeled Macrolon cages (MIII type, height 18 cm.) containing sterilized sawdust as bedding material and paper as cage-enrichment
- Diet (e.g. ad libitum): Free access to pelleted rodent diet
- Water (e.g. ad libitum): Free access to tap water
- Acclimation period: at least 5 days before start of treatment under laboratory conditions


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19.5 – 21.7
- Humidity (%): 41 - 73
- Air changes (per hr): 15
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Type of coverage:

occlusive

Vehicle:

propylene glycol

Details on dermal exposure:

TEST SITE
- Area of exposure: 25 cm2 for males and 18 cm2 for females
- % coverage: test site covered for 100%
- Type of wrap if used: The test substance formulation was held in contact with the skin with a dressing, consisting of a surgical gauze patch (Surgy 1D), successively covered with aluminum foil and Coban elastic bandage. A piece of Micropore tape was additionally used for fixation of the bandages in females only.


REMOVAL OF TEST SUBSTANCE
- Washing (if done): skin cleaned of residual test substance using tap water
- Time after start of exposure: 24 hours


TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 2000 mg/kg (10 mL/kg) body weight.

VEHICLE
- Amount(s) applied (volume or weight with unit): 10 ml/kg

Duration of exposure:

24 hours

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

5

Control animals:

no

Details on study design:

- Mortality/Viability: Twice daily for 15 days.
- Body weights: Days 1 (pre-administration), 8 and 15.
- Clinical signs: At periodic intervals on the day of dosing (Day 1) and once daily thereafter, until Day 15.
- Necropsy of survivors performed: yes.

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Mortality:

No mortality occurred.

Clinical signs:

other: Chromodacryorrhoea was noted in two animals on Day 1. This symptom is more often seen in these types of studies. Based on the mild nature and short duration of this symptom and the absence of any corroborative signs in these animals, it was considered to

Gross pathology:

No toxicologically relevant abnormalities were found at macroscopic post mortem examination of the animals.

Incidental findings:
In one male, reduced size of the left testis and epididymis was found, which is occasionally noted among rats of this age and strain and was therefore considered not toxicologically significant.

Applicant's summary and conclusion

Interpretation of results:

not classified

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

In an acute dermal toxicity study with rats, performed according to OECD/EC test guidelines and GLP principles, an LD50 >2000 mg/kg bw for Y-513 was determined.

Executive summary:

An acute dermal toxicity study was performed with rats according to OECD/EC test guidelines and GLP principles. Rats (5/sex) were exposed to 2000 mg/kg bw for 24 hours. No clinical signs were noted, no mortality occurred. No changes in expected body weight gain occurred, no abnormalities were found at necropsy.

Based on these data, the dermal LD50 for Y-513 was determined exceed 2000 mg/kg bw, the substance is thus not classified for dermal toxicity according to Regulation (EC) 1272/2008.