Hexan-4-olide

Endpoint summary

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

yes

Test type:

acute toxic class method

Limit test:

yes

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

Species Wistar rats
Source Dobrá Voda, Slovak Republic
Number and Sex of Animals 6 females
Age at First Dose 9-10 weeks; female animals were non-pregnant and nulliparous
Animal Health Health condition of animals was examined by a veterinarian before initiation of the study.
Acclimation The animals were acclimated under the conditions identical to the conditions during the experiment 5 days prior to the start of treatment. The acclimation was according to the standard operation procedure.
Housing Condition The animals were housed in plastic cages suspended on stainless steel racks, 3 animals per cage in a room equipped with central air-conditioning. The average room temperature was maintained within the range of 22.09 ± 0.21 °C, relative humidity within 54.33 ± 2.34 %. The light regimen was set to a 12-hour light /12-hour dark cycle. Sanitation was performed according to the standard operation procedures.
Diet The laboratory food ssniff (Spezialdiäten GmbH, Germany) was offered at recommended doses each day approximately at the same time. The certificate of analysis is included in the raw data.
Water The animals received tap water for human consumption. Supply of drinking was unlimited. The quality of drinking water is periodical analysed and recorded; certificate of analysis is included in the raw data.
Bedding Lignocel S3/4, Lufa - ITL GmbH, Germany
Animals Identification The animals in the cage were marked by a line (I-III) on the tail with a waterproof marker. Each cage was marked with the study code, ID of animals and date of administration of the test item.
Justification for the Choice of Species Normally females are used for testing according to OECD TG 423 because females are typically the more sensitive gender.

Route of administration:

oral: gavage

Vehicle:

olive oil

Details on oral exposure:

The test item was administered in a single dose by gavage using a metal stomach tube. Animals were fasted prior to dosing (food but not water were withheld over-night). Following a period of fasting, animals were weighed and the test item administered. After test item administration, food was withheld for further 3-4 hours.

Doses:

2000 mg/kg

No. of animals per sex per dose:

6

Control animals:

no

Preliminary study:

A limit dose of 2000 mg/kg body weight was used as a starting dose. One group of 3 females was dosed. Test item-related mortality was not observed during 24 hours and therefore, in a second step, another 3 females were treated at the same dose.

Key result

Sex:

female

Dose descriptor:

other: Clinical Observation

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

not determinable due to absence of adverse toxic effects

Mortality:

No mortality was observed during the study.

Clinical signs:

other: No mortality was observed during the study. During the follow up period, no animals displayed signs of intoxication, change of health, nor any other adverse reaction.

Gross pathology:

The test item gamma-Dodecalactone administered to 6 females at a limit dose of 2000 mg/kg body weight did not caused death. No signs of toxicity were observed during the first 4 hours in females or the 14-day observation period thereafter. A stagnation of body weight in one animal was observed. The body weights of the rest animals increased during the study. During necropsy, no macroscopic findings were observed.

Interpretation of results:

GHS criteria not met

Conclusions:

The LD50 of the test item is greater than 2000 mg/kg body weight after single oral administration to Wistar rats.
Based on Annex 2d Test Procedure with a Starting Dose of 2000 mg/kg body weight of OECD Guideline 423 it can be concluded that the test item is according to UN Globally Harmonized System of Classification, Labelling and Packaging of Chemicals classified Category 5/Unclassified with a LD50 cut off value equal to or greater than 5000 mg/kg body weight according to Regulation (EU) Nr. 1272/2008 (CLP), after single oral administration to Wistar rats.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 000 mg/kg bw

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 000 mg/kg bw