Reaction mass of allyl (2-methylbutoxy)acetate and allyl (3-methylbutoxy)acetate

Endpoint summary

Description of key information

Acute toxicity (oral): LD50 (female) >300 < 2000 mg/kg bw

Acute toxicity (dermal): LD50 (female) >1000 mg/kg bw - ≤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:

29th November 2017 - 5th February 2018

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 (incl. QA statement)

Test type:

acute toxic class method

Limit test:

no

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: O’Laughlin (Nantong) Fine Chemicals Co., Ltd.; NTA375
- Expiration date of the lot/batch: Sep 25, 2020
- Purity test date: CAS No. 67634-00-8: 79.45 %; CAS No.: 67634-01-9 20.28 %

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: Immediately before application the test item was weighed, mixed with vehicle olive oil and resulting emulsion was administered to the stomach by tube. All prepared emulsions of the test item in olive oil were mixed by magnetic stirrer during administration.

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: SPF breeding, VELAZ s.r.o., Lysolajské údolí 15/53, 165 00 Prague 6, Czech Republic, RČH CZ 11760500
- Age at study initiation: 8 weeks at the time of application
- Weight at study initiation: 163-188g
- Housing: Animal room with shavings of soft wood – 3 animals of one sex in one plastic breeding cage
- Diet: Pelleted standard diet for experimental animals ad libitum
- Water: Drinking tap water ad libitum
- Acclimation period: 5 days

ENVIRONMENTAL CONDITIONS
- Temperature: 22 ± 3 °C
- Humidity:30 – 70 %,
- Photoperiod : Light period 12-hour light/12 hour dark

Route of administration:

oral: gavage

Vehicle:

olive oil

Details on oral exposure:

VEHICLE
- Amount of vehicle (if gavage): 1 mL/100 g of animal body weight
- Justification for choice of vehicle: The test item does not make a homogenous emulsion with water, so olive oil had to be used
- Lot/batch no. (if required): 8002954001

CLASS METHOD (if applicable)
- Rationale for the selection of the starting dose: The dose level of 300 mg/kg bw was used as the starting dose, according to the test guideline, because there was no information about toxicity available.

Doses:

300 mg/kg bw (Group 1 and 3)
2000 mg/kg (Group 2)

No. of animals per sex per dose:

3 females

Control animals:

no

Details on study design:

- Duration of observation period following administration: After application the animals were observed individually:
- the first day: twice (30 minutes and 3 hours after application)
- the second day: twice (in the morning and in the afternoon) and daily thereafter for 14 days.

Observations included changes in skin and fur, eyes, visible mucous membranes, behaviour of animals, somatomotor activity, reactions to stimuli, and presence of lacrimation, salivation and discharge from nostrils, function of respiratory, digestive and urogenital system.

- Frequency of observations and weighing: Animals were weighed before application, at the 8th day of study and at the 15th day, before euthanasia of animals. Average body weight in a group was calculated from individual body weights. Body weight increments were calculated from body weight at the start of the study,
the first week and at the end of the study.

- Necropsy of survivors performed: All test animals survived to the end of study were sacrificed on the 15th day and gross necropsy was carried out. Nutritious status, body surface, body foramina, thoracic, abdominal and cranial cavity were evaluated. All gross macroscopic changes of organs and tissues were recorded

Sex:

female

Dose descriptor:

LD50

Effect level:

> 300 - < 2 000 mg/kg bw

Mortality:

No deaths were observed in the groups administered 300 mg/kg bw. In the group administered 2000 mg/kg bw, 2 females died and 1 female was killed for moribund status

Clinical signs:

other: No clinical signs of intoxication were observed in all 6 females at the dose 300 mg/kg (Group 1 and 3) during the clinical observation after the application (see Tables No. 4 and 6). At the dose level 2000 mg/kg (Group 2) the following symptoms were obse

Gross pathology:

No pathological macroscopic changes were diagnosed during pathological examination of animals at the dose 300 mg/kg in group No. 1 and No. 3. (see Tables No. 7, 9). Animals in Group 1 and 3 were sacrificed on the 15th day of study. Pathological changes were observed during pathological examination at the dose level 2000 mg/kg. Stomach full of the test item and massive hemorrhages of the mucous membrane, small intestine - hyperemia of GALT (gut-associated lymphoid tissue) and liver – dark red color, were observed in group No. 2 (see Table No. 8). The necropsy was done immediately after death (4 hours after application) in female No. 4. Female No. 5 was found dead on the morning of the second day and the necropsy was done approximately 24 hours after application, but significant post-mortem rigidity indicated that the animal died on the day of application. Female No. 6 was sacrificed approximately 24 hours after application for moribund condition.

Interpretation of results:

Category 4 based on GHS criteria

Conclusions:

In this acute oral toxcity test (acute toxic class method), the LD50 value of the test item, allyl amyl glycolate, for female rats is > than 300 mg/kg and < 2000 mg/ kg of body weight

Executive summary:

In an acute oral toxicity study (18-1), Wistar female rats (5/dose) were given allyl amyl glycolate in olive oil by gavage at doses of 300 and 2000 mg/kg bw and observed for 14 days.

LD50 (female): >300 < 2000 mg/kg bw.

The test item administered at the dose of 300 mg/kg bw caused no death of any animal. No serious clinical signs of intoxication were detected at this dose during the whole study. Weight increments were adequate to species, sex and age of animals in experiment. No pathological macroscopic changes were diagnosed during the pathological examination. The test item administered at the dose of 2000 mg/kg bw caused the death of two females and one female was humanely killed for moribund condition. Abdominal position was observed in all animals 30 minutes after application. Piloerection and decreased response to stimuli were observed in all animals 3 hours after application, abdominal position and rocking motion were observed in 2 animals 3 hours after application.  Apathy, bradypnoea, and immobility were observed in one female 3 hours after application. This female died 4 hours after application. Urine containing blood was observed in one female 3 hours after application. This female was found dead second day after application, but significant post-mortem rigidity indicated that the animal died on the day of application.  Piloerection, porphyrin secretion around nostrils, urine containing blood, immobility and apathy were observed in one female, on the morning of the second day after application. The animal was humanely killed for moribund condition.

This acute oral study is classified as acceptable. It does satisfy the guideline requirement for an acute oral study (OECD 423) in the rat.

Endpoint conclusion

Endpoint conclusion:

adverse effect observed

Dose descriptor:

LD50

Value:

300 mg/kg bw

Quality of whole database:

There is one key study available for acute oral toxicity and it is an OECD guideline/GLP study. The quality of the database is high.

Acute toxicity: via inhalation route

Link to relevant study records

Reference

Endpoint:

acute toxicity: inhalation

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Link to relevant study records

Reference

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

6th February 2018 - 3rd May 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

no

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: O’Laughlin (Nantong) Fine Chemicals Co., Ltd.; NTA375
- Expiration date of the lot/batch: Sep 25, 2020
- Purity: CAS No. 67634-00-8: 79.45 %; CAS No.: 67634-01-9 20.28 %

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Breeding farm VELAZ s.r.o., Lysolajské údolí 15/53, 165 00 Prague 6, Czech Republic, RČH CZ 11760500
- Females (if applicable) nulliparous and non-pregnant: Yes
- Weight at study initiation: 211-236 g
- Housing: Animal room with monitoring conditions; shavings of soft wood
- Diet: Pelleted standard diet for experimental animals ad libitum
- Water: Drinking tap water ad libitum
- Acclimation period: 21 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 ± 3°C
- Humidity (%): 30 – 70 %
- Photoperiod (hrs dark / hrs light): 12-hour light/12 hour dark

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

TEST SITE
- Area of exposure: About 6 x 6 cm on the back of animals (shaved)
- % coverage: Approx. 10 % of the body surface
- Type of wrap if used: Gauze and held in contact by plaster (strapping)

REMOVAL OF TEST SUBSTANCE
- Washing (if done): No

Duration of exposure:

24 hrs

Doses:

Range finding study: 1000 mg/kg bw
Main study: 200, 1000 mg/kg bw/day

No. of animals per sex per dose:

Range finding study: 1 female
Main study: 2 females per dose

Control animals:

not required

Details on study design:

- Duration of observation period following administration: After application the animals were observed individually:
-the first day: three times (30 minutes, 3 and 6 hours after application)
- the second day: twice (in the morning and in the afternoon) and daily thereafter for 14 days
- Frequency of observations and weighing: The animals were weighed at the start of the study (before application), at 8th day and at the end of experiment (15th day).
- Necropsy of survivors performed: All test animals surviving to the end of study were sacrificed on the 15th day by diethyl ether narcosis and gross necropsy was carried out. Nutritional state, body surface, body foramina, thoracic, abdominal and cranial cavity were evaluated
- Other examinations performed: Observations included changes in skin and fur, eyes, visible mucous membranes, behaviour of animals, somatomotor activity, reactions to stimuli, and presence of lacrimation, salivation and discharge from nostrils, function of respiratory, digestive and urogenital system

Preliminary study:

The test item at the dose level 1000 mg/kg bw caused the death of the animal. Clinical signs of intoxication noted as apathy, decreased reaction to stimuli and red discharge from nostrils were observed 6 hours after administration of the test item. The following morning, the animal was found dead. Red-stained fur around the urethra outflow was recorded. Red-stained content of the small intestine and congested small intestine were observed. Based on these results, the main study with two females was started with the dose of 200 mg/kg bw.

Sex:

female

Dose descriptor:

LD50

Effect level:

> 1 000 - <= 2 000 mg/kg bw

Mortality:

No death of animals was recorded at the dose level 200 mg/kg bw. One of the two females at the dose level 1000 mg/kg bw died during the main study.

Clinical signs:

other: Clinical signs of toxicity noted as apathy, decreased reaction to stimuli, bradypnoea, piloerection, red discharge form nostrils, dark red-stained urine were observed in females at the dose level 1000 mg/kg bw. No clinical signs of toxicity were recorded

Gross pathology:

During the pathological examination, changes as dilatation of the small intestine, congestion of the intestine and dark red-stained urine were diagnosed in one female dosed by 1000 mg/kg bw. No macroscopic findings were recorded in females at the dose level 200 mg/kg bw.

Interpretation of results:

Category 4 based on GHS criteria

Conclusions:

In an acute dermal toxicity study in rats, the LD50 for allyl amyl glycolate was >1000 mg/kg bw - ≤2000 mg/kg bw.

Executive summary:

In an acute dermal toxicity study (18 -163) 2 female Wistar rats were dermally exposed (semi-occlusive) to allyl amyl glycolate at doses of 200 and 1000 mg/kg bw for 24 hours. Animals were then observed for 14 days.

Dermal LD50 (Females) = >1000 mg/kg bw - ≤2000 mg/kg bw.

No death of animals was recorded at the dose level 200 mg/kg bw. One of the two females at the dose level 1000 mg/kg bw died. The body weight gain was adequate to species, sex and age of animals except very little body weight gain in one animal at 200 mg/kg bw. No clinical signs of toxicity were recorded in females at the dose level 200 mg/kg bw. Clinical signs of toxicity noted as apathy, decreased reaction to stimuli, bradypnoea, piloerection, red discharge form nostrils, dark red-stained urine were observed in females at the dose level 1000 mg/kg bw. No macroscopic findings were recorded in females at the dose level 200 mg/kg bw. During the pathological examination, changes as dilatation of the small intestine, congestion of the intestine and dark red-stained urine were diagnosed in one female dosed by 1000 mg/kg bw.

This acute dermal study is classified as acceptable. It does satisfy the guideline requirement for an acute oral study (OECD 402) in the rat.  

Endpoint conclusion

Endpoint conclusion:

adverse effect observed

Dose descriptor:

LD50

Value:

1 000 mg/kg bw

Quality of whole database:

There is one key study available for acute oral toxicity and it is an OECD guideline/GLP study. The quality of the database is high.

Additional information

Acute oral toxcity

There is one acute oral toxicity study in the rat available.

In an acute oral toxicity study (OECD 423/GLP), Wistar female rats (5/dose) were given allyl amyl glycolate in olive oil by gavage at doses of 300 and 2000 mg/kg bw and observed for 14 days. The test item administered at the dose of 300 mg/kg bw caused no death of any animal. No serious clinical signs of intoxication were detected at this dose during the whole study. Weight increments were adequate to species, sex and age of animals in experiment. No pathological macroscopic changes were diagnosed during the pathological examination. The test item administered at the dose of 2000 mg/kg bw caused the death of two females and one female was humanely killed for moribund condition. Abdominal position was observed in all animals 30 minutes after application. Piloerection and decreased response to stimuli were observed in all animals 3 hours after application, abdominal position and rocking motion were observed in 2 animals 3 hours after application.  Apathy, bradypnoea, and immobility were observed in one female 3 hours after application. This female died 4 hours after application. Urine containing blood was observed in one female 3 hours after application. This female was found dead second day after application, but significant post-mortem rigidity indicated that the animal died on the day of application.  Piloerection, porphyrin secretion around nostrils, urine containing blood, immobility and apathy were observed in one female, on the morning of the second day after application. The animal was humanely killed for moribund condition. The LD50 (female) was >300 < 2000 mg/kg bw.

Acute dermal toxcity

There is one acute dermal toxicity study in the rat available.

In an acute dermal toxicity study (OECD 402/GLP), 2 female Wistar rats were dermally exposed (semi-occlusive) to allyl amyl glycolate at doses of 200 and 1000 mg/kg bw for 24 hours. Animals were then observed for 14 days. No death of animals was recorded at the dose level 200 mg/kg bw. One of the two females at the dose level 1000 mg/kg bw died. The body weight gain was adequate to species, sex and age of animals except very little body weight gain in one animal at 200 mg/kg bw. No clinical signs of toxicity were recorded in females at the dose level 200 mg/kg bw. Clinical signs of toxicity noted as apathy, decreased reaction to stimuli, bradypnoea, piloerection, red discharge form nostrils, dark red-stained urine were observed in females at the dose level 1000 mg/kg bw. No macroscopic findings were recorded in females at the dose level 200 mg/kg bw. During the pathological examination, changes as dilatation of the small intestine, congestion of the intestine and dark red-stained urine were diagnosed in one female dosed by 1000 mg/kg bw. The LD50 (female) was >1000 mg/kg bw - ≤2000 mg/kg bw.

 

Justification for classification or non-classification

Based on the available information in the dossier, the substance Allyl Amyl Glycolate (EC No. 916-328-0) should be classified for Acute Oral Toxicity Category 4 and Acute Dermal Toxicity Category 4 when the criteria outlined in Annex I of 1272/2008/EC are applied.