Propanal, 3-(acetyloxy)-2,2-dimethyl-

Endpoint summary

Description of key information

Acute toxicity: oral

The test item did not induce mortality following a single oral administration to rats at a dose of 2000 mg/kg bw.

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

Study period:

2015-11-18 to 2016-01-25

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)

Version / remarks:

2001

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1100 (Acute Oral Toxicity)

Version / remarks:

2002

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

acute toxic class method

Limit test:

yes

Species:

rat

Strain:

Wistar

Remarks:

Crl(WI)Br

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Toxi-Coop Zrt. 1103 Budapest, Cserkesz u. 90
- Females nulliparous and non-pregnant: yes
- Age at study initiation: Young adult rats, 12 weeks old in group 1 and 2
- Weight at study initiation: 242-252 g (first step); 255-266 g (second step)
- Fasting period before study: one day before treatment
- Housing: 3 animals/sex/cage; Type II polypropylene/polycarbonate; rat type cages with a solid floor, stainless steel wire covers and self-feeding baskets.
- Diet: The animals received ssniff® SM R/M-Z+H complete diet produced by ssniff Spezialdiäten GmbH, D-59494 Soest Germany, ad libitum. The food is periodically analysed and is considered not to contain any contaminants that could reasonably be expected to affect the purpose or integrity of the study. Copies of the relevant Certificates of Analysis are maintained in Toxi-Coop Zrt.’s archive.
- Water: Animals received tap water from watering bottles ad libitum. The drinking water is periodically analysed and is considered not to contain any contaminants that could reasonably be expected to affect the purpose or integrity of the study. Copies of the relevant Certificates of Analysis are maintained in Toxi-Coop Zrt.’s archive.
- Acclimation period: 32 days (first step); 33 days (second step)

ENVIRONMENTAL CONDITIONS
Environmental conditions were maintained by an air-conditioning system. Temperature and relative humidity were verified and recorded daily during the study.
- Temperature: 22 ± 3 °C
- Humidity: 30 - 70 %
- Air changes: above 10 air exchanges/hour by central air-condition system.
- Photoperiod: Artificial light, from 6 a.m. to 6 p.m.

Route of administration:

oral: gavage

Vehicle:

other: Helianthi annui oleum raffinatum

Details on oral exposure:

VEHICLE
- Concentration in vehicle: Concentration of formulations were adjusted to maintain a treatment volume of 10 mL/kg bw. The test item was applied in a concentration of 200 mg/mL. Formulations were prepared just before the administration and stirred continuously during the treatment.
- Lot/batch no.: 1506-4604
- Manufactured: Parma Produkt Kft.
- Expiry date: 02.06.2016

MAXIMUM DOSE VOLUME APPLIED: 10 mL/kg bw

CLASS METHOD
- Rationale for the selection of the starting dose: Starting dose was selected on the basis of the available information about the test item. The acute toxic class method was carried out involving a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats. No animal died in the first step at 2000 mg/kg bw dose level. Therefore, treatment with 2000 mg/kg bw was repeated on further three female rats. Again, no animal died in the second step, thus, no further testing was required.

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

6

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Inspection for signs of morbidity and mortality were made twice daily at the beginning and end of the working day. The body weight were recorded on day 0 (shortly before the treatment), on day 7 and on day 15 on all animals with a precision of 1 g, respectively.
- Necropsy of survivors performed: Yes. All animals were subjected to gross pathology. All animals were exsanguinated under isoflurane anaesthesia. After examination of the external appearance the cranial, thoracic and abdominal cavities were opened and the appearance of the tissues and organs were observed. All gross pathological changes were recorded for each animal on the post mortem record sheets.
- Other examinations performed: Clinical Observations: Animals were observed individually after dosing once during the first 30 minutes, then 1 h, 2 h, 3 h, 4 h, after the treatment and once per day for 14 days thereafter. Individual observations were performed on the skin and fur, eyes and mucous membranes and also respiratory, circulatory, autonomic and central nervous system, somatomotor activity and behaviour pattern. Particular attention was directed to observation of tremors, convulsions, salivation, diarrhoea, lethargy, sleep and coma.

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

The test item did not induce mortality following a single oral administration to female rats at a dose of 2000 mg/kg bw. All female rats survived the performed treatment until the end of the 14-day observation period.

Clinical signs:

other: No treatment related symptoms were observed throughout the treatment day and 14-day post-treatment period at any groups of the female animals.

Gross pathology:

All animals treated with 2000 mg/kg bw dose of test item survived until the scheduled necropsy on Day 15. Slight hydrometra was detected in animal No.: 230 of group 1 and moderate hydrometra was observed in two females (No.: 234 of the group 1 and No.: 255 of the group 2). Hydrometra is a physiological finding and connected to the cycle of the animal. No pathological changes were found related to the effect of the test item during the macroscopic examination of animals.

Interpretation of results:

other: not classified

Conclusions:

The test item did not induce mortality following a single oral administration to female rats at a dose of 2000 mg/kg bw. There were no toxic clinical signs and any related to the effect of the test item found in body weights and body weight gains during the study. Autopsy revealed no treatment related pathological changes.

Executive summary:

An acute oral toxicity study was carried out using the class method according to OECD guideline 423. The method was conducted using a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats. The starting dose was selected on the basis of the available information about the test item. The acute toxic class method was carried out involving a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats. No animal died in the first step at 2000 mg/kg bw dose level. Therefore, treatment with 2000 mg/kg bw was repeated on further three female rats. Again, no animal died in the second step, thus, no further testing was required. The stopping criteria of Annex 2d of OECD Guideline No. 423 were met. Animals were weighed, observed for lethality and toxic symptoms for 14 days after the treatment. Gross pathological examination was carried out on 15th day after the treatment.

Lethality, Clinical symptoms and Body weight:

No lethality was noted following oral administration of a single dose of 2000 mg/kg bw. In first and second step, no clinical symptoms were observed on the day of the treatment and during the 14-day observation period, the general state and behaviour of experimental animals were normal. The body weight development was normal in all animals.

Gross pathology:

Altogether 6 animals were subjected to scheduled sacrifice during the study. All organs of the animals treated with 2000 mg/kg bw dose proved to be free of treatment related gross pathological changes.

Evaluation:

The method used is not intended to allow for the calculation of a precise LD50 value. However for this acute oral toxicity study with the test item in rats the determined LD50 is greater than 2000 mg/kg bw (LD50 ≥ 2000 mg/kg bw). The test item is ranked into classes of Globally Harmonized Classification System (GHS) described in the OECD Guideline No. 423 as not classified.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

discriminating dose

Value:

2 000 mg/kg bw

Quality of whole database:

GLP and guideline study

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information

Acute toxicity: oral

An acute oral toxicity study was carried out using the class method according to OECD guideline 423. The method was conducted using a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats. The starting dose was selected on the basis of the available information about the test item. The acute toxic class method was carried out involving a stepwise procedure with the use of 2000 mg/kg bw as the starting dose in three female rats. No animal died in the first step at 2000 mg/kg bw dose level. Therefore, treatment with 2000 mg/kg bw was repeated on further three female rats. Again, no animal died in the second step, thus, no further testing was required. The stopping criteria of Annex 2d of OECD Guideline No. 423 were met. Animals were weighed, observed for lethality and toxic symptoms for 14 days after the treatment. Gross pathological examination was carried out on 15th day after the treatment. No lethality was noted following oral administration of a single dose of 2000 mg/kg bw. In first and second step, no clinical symptoms were observed on the day of the treatment and during the 14-day observation period, the general state and behaviour of experimental animals were normal. The body weight development was normal in all animals. Altogether 6 animals were subjected to scheduled sacrifice during the study. All organs of the animals treated with 2000 mg/kg bw dose proved to be free of treatment related gross pathological changes. The method used is not intended to allow for the calculation of a precise LD50 value. However for this acute oral toxicity study with the test item in rats the determined LD50 is greater than 2000 mg/kg bw (LD50 ≥ 2000 mg/kg bw). The test item is ranked into classes of Globally Harmonized Classification System (GHS) described in the OECD Guideline No. 423 as not classified.

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No 1272/2008
The available experimental test data are reliable and suitable for classification purposes under Regulation (EC) No 1272/2008. Based on available data on acute toxicity, the test item is not classified according to Regulation (EC) No 1272/2008 (CLP), as amended for the eighth time in Regulation (EU) No 2016/918.