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Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27 February, 2001 - 13 March, 2001
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Reliability 1 is assigned because the study is conducted according to OECD TG 402 in compliance with GLP, without deviations that influence the quality of the results.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2001
Report date:
2001

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Version / remarks:
(1987)
Deviations:
no
Qualifier:
according 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

1
Chemical structure
Reference substance name:
Tetrahydro-3-pentyl-2H-pyran-4-yl acetate
EC Number:
242-640-5
EC Name:
Tetrahydro-3-pentyl-2H-pyran-4-yl acetate
Cas Number:
18871-14-2
Molecular formula:
C12H22O3
IUPAC Name:
tetrahydro-3-pentyl-2H-pyran-4-yl acetate
2
Chemical structure
Reference substance name:
Reaction mass of (3S,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate and (3R,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate
Molecular formula:
C12H22O3
IUPAC Name:
Reaction mass of (3S,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate and (3R,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate
Constituent 1
Chemical structure
Reference substance name:
(3S,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate
Molecular formula:
C12H22O3
IUPAC Name:
(3S,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate
Constituent 2
Chemical structure
Reference substance name:
(3R,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate
Molecular formula:
C12H22O3
IUPAC Name:
(3R,4S)-3-pentyltetrahydro-2H-pyran-4-yl acetate
Test material form:
liquid

Test animals

Species:
rat
Strain:
other: Sprague-Dawley CD (Crl: CD® ( SD) IGS BR)
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Charles River (UK) Ltd, Margate, Kent, UK
- Age at study initiation: approximately 8 weeks
- Weight at study initiation: males: 288 - 309 g; females: 233 - 259 g
- Housing: The animals were housed in suspended polypropylene cages furnished with woodflakes. The animals were housed individually during the 24-hour exposure period and in groups of five, by sex, for the remainder of the study.
- Diet: Free access to food (Rat and Mouse SQC Expanded Diet No. 1, Special Diets Services Limited, Witham, Essex, UK)
- Water: Free access to drinking water
- Acclimation period: At least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): set to maintain 19 - 25
- Humidity (%): set to maintain 30 - 70
- Air changes (per hr): At least 15
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Type of coverage:
semiocclusive
Vehicle:
unchanged (no vehicle)
Details on dermal exposure:
TEST SITE
- Area of exposure: area of shorn skin
- % coverage: approximately 10% of the total body surface area
- Type of wrap if used: A piece of surgical gauze was placed over the treatment area and semi-occluded with a piece of selfadhesive bandage.

REMOVAL OF TEST SUBSTANCE
- Washing: The treated skin and surrounding hair was wiped with cotton wool moistened with distilled water to remove any residual test material.
- Time after start of exposure: 24 hours
Duration of exposure:
24 hours
Doses:
2000 mg/kg bw
No. of animals per sex per dose:
5
Control animals:
not required
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations:
Mortality and clinical signs: The animals were observed for deaths or overt signs of toxicity 0.5, 1, 2 and 4 hours after dosing and subsequently once daily for 14 days. After removal of the dressings and subsequently once daily for 14 days, the test sites were examined for evidence of primary irritation and scored for skin reactions.
Bodyweights: Individual bodyweights were recorded prior to application of the test material on Day 0 and on Days 7 and 14.
- Necropsy of survivors performed: At the end of the study the animals were killed by cervical dislocation and subjected to gross pathological examination. This consisted of an external examination and opening of the abdominal and thoracic cavities. The appearance of any macroscopic abnormalities was recorded.
Statistics:
Not performed.

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:
No deaths occurred.
Clinical signs:
There were no signs of systemic toxicity.
Body weight:
All animals showed expected gains in bodyweight over the study period.
Gross pathology:
No abnorrnalities were noted at necropsy.
Other findings:
There were no signs of dermal irritation.

Applicant's summary and conclusion

Interpretation of results:
other: not acute dermally toxic
Remarks:
according to CLP 1272/2008 and its amendments
Conclusions:
The acute dermal toxicity of the substance was >2000 mg/kg bw.
Executive summary:

In this study performed to OECD TG 402 guideline and GLP principles, 10 rats (5 males and 5 females) were administered to the substance at a dose level of 2000 mg/kg bw. No deaths occurred and there were no signs of systemic toxicity. All animals showed expected gains in bodyweight over the study period. There were no signs of dermal irritation and no abnorrnalities were noted at necropsy. The acute dermal LD50 for the substance in male and female rats was determined to be >2000 mg/kg bw.

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