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Diss Factsheets

Administrative data

Description of key information

Key study: OECD 423. GLP study. The LD50 of the test item is higher than 2000 mg/kg body weight by oral route in the rat. The LD50 cut-off of the test item may be considered to be higher than 5000 mg/kg body weight by oral route in the rat.

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:
November 15, 2016 - November 30, 2016
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)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Test type:
acute toxic class method
Limit test:
yes
Species:
rat
Strain:
Sprague-Dawley
Sex:
female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Elevage JANVIER LABS (53940 Le genest St. Isle - France)
- Females nulliparous and non-pregnant: yes
- Age at study initiation: 8 weeks old
- Weight at study initiation: Step 1: 206 ± 6.1 g; Step 2 and 3: 236.8 ± 22.6 g
- Fasting period before study: overnight
- Housing: Rats were housed by group of three in solid-bottomed clear polycarbonate cages with a stainless steel mesh lid. Each cage contains sawdust bedding which was changed at least 2 times a week. Each cage was installed in conventional air conditioned animal husbandry.
- Diet: foodstuff (ENVIGO - 2016) ad libitum
- Water: tap-water from public distribution system ad libitum. Microbiological and chemical analyses of the water were carried out once every six months by Bureau Veritas-eurofins (France)
- Acclimation period: at least five days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19ºC - 25ºC
- Humidity (%): 30% - 70%
- Air changes (per hr): Ten changes per hour
- Photoperiod (hrs dark / hrs light): Twelve hours light (07.00 to 19.00) / twelve hours darkness.

IN-LIFE DATES: From: November 15, 2016 To: November 30, 2016
Route of administration:
oral: gavage
Vehicle:
DMSO
Details on oral exposure:
VEHICLE
- Concentration in vehicle: 2 g/ 10 mL.
- Amount of vehicle (if gavage): 10 mL/kg
- Justification for choice of vehicle: it produced the most suitable formulation at the requested concentration.

MAXIMUM DOSE VOLUME APPLIED: 10 mL/kg

CLASS METHOD (if applicable)
- Rationale for the selection of the starting dose: Whitout preliminary information. The selected starting dose is 2000 mg/kg body weight.
Doses:
2000 mg/kg
No. of animals per sex per dose:
6
Control animals:
yes
Remarks:
Study No. TAO423-2016-006 (see "Other information on results").Study No. TAO423-2016-006 (see "Other information on results").
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Systemic observations at 30 min, 1h, 3h, 4h, 24h, 48h after administration and daily during 14 days. Weighing: on Day 0 (just before administering the test item) then on Day 2, Day 7, and Day 14.
- Necropsy of survivors performed: yes. At termination, macroscopic observation was observed. Macroscopic observations were entered on individual autopsy sheets. Only those organs likely to be modified in cases of acute toxicity were examined. Parameters examined: Oesophagus, Stomach, Duodenum, Jejunum, Ileon, Caecum, Colon, Rectum, Spleen, Liver, Thymus, Trachea, Lungs, Heart, Kidneys, Urinary Bladder, Ovaries, Uterus, Treatment Area, Adrenals and Pancreas.
- Other examinations performed:
Clinical signs: Spontaneous activity, Preyer's reflex (noise), Respiratory rate, Convulsions, Tremors, Body temperature, Muscle tone, Palpebral opening, Pupil appearance, Salivation, Lachrymation, Righting reflex, Back hair appearance, Mortality.
Key result
Sex:
female
Dose descriptor:
LD50
Effect level:
>= 2 000 mg/kg bw
Based on:
test mat.
Key result
Sex:
female
Dose descriptor:
LD50 cut-off
Effect level:
ca. 5 000 mg/kg bw
Based on:
test mat.
Mortality:
No mortality occurred during the study.
Clinical signs:
other: A decrease of spontaneous activity (4/6), muscle tones (3/6), righting reflex (3/6) and Preyer's reflex (2/6) associated with an increase of salivation (2/6) was noted during the first hours of the test. The animals recovered a normal activity at 24 hours
Gross pathology:
The macroscopic examination of the animals at the end of the study did not reveal treatment related changes.

Clinical observations: results in Tables 1 to 5.

Body weight evolution: normal during the test (Table 6).

Macroscopical examinations: Nothing to report.

Table 1. Test item at 2000 mg/kg bw. Observation data sheet.

OBSERVATIONS:

FEMALES

FEMALES

T0 + 30 minutes

Rf 0715

Rf 0716

Rf 0717

Rf 0727

Rf 0728

Rf 0729

Spontaneous activity

N

N

N

N

N

D

Preyer’s réflex (noise)

N

N

N

N

N

N

Repiratory rate

N

N

N

N

N

N

convulsions

N

N

N

N

N

N

tremors

N

N

N

N

N

N

Body temperature

N

N

N

N

N

N

Muscle tone

N

N

N

N

N

N

Palpebral opening

N

N

N

N

N

N

Pupil appearance

N

N

N

N

N

N

Salivation

A

N

A

N

N

N

Lachrymation

N

N

N

N

N

N

Ringhting reflex

N

N

N

N

N

N

Back hair appearance

N

N

N

N

N

N

MORTALITY

0

0

0

0

0

0

Remarks

None

None

 

 

N: Normal / None (Convulsions, Tremors)

A: Increased

D: Decreased

 

 

Table 2. Test item at 2000 mg/kg bw. Observation data sheet.

OBSERVATIONS:

FEMALES

FEMALES

T0 + 1 hour

Rf 0715

Rf 0716

Rf 0717

Rf 0727

Rf 0728

Rf 0729

Spontaneous activity

N

N

N

N

N

D

Preyer’s réflex (noise)

N

N

N

N

N

N

Repiratory rate

N

N

N

N

N

N

convulsions

N

N

N

N

N

N

tremors

N

N

N

N

N

N

Body temperature

N

N

N

N

N

N

Muscle tone

N

N

N

N

N

N

Palpebral opening

N

N

N

N

N

N

Pupil appearance

N

N

N

N

N

N

Salivation

N

N

A

N

N

N

Lachrymation

N

N

N

N

N

N

Ringhting reflex

N

N

N

N

N

N

Back hair appearance

N

N

N

N

N

N

MORTALITY

0

0

0

0

0

0

Remarks

None

None

 

 

N: Normal / None (Convulsions, Tremors)

A: Increased

D: Decreased

 

Table 3. Test item at 2000 mg/kg bw. Observation data sheet.

OBSERVATIONS:

FEMALES

FEMALES

T0 + 3 hours

Rf 0715

Rf 0716

Rf 0717

Rf 0727

Rf 0728

Rf 0729

Spontaneous activity

N

N

N

N

N

N

Preyer’s réflex (noise)

N

N

N

N

N

N

Repiratory rate

N

N

N

N

N

N

convulsions

N

N

N

N

N

N

tremors

N

N

N

N

N

N

Body temperature

N

N

N

N

N

N

Muscle tone

N

N

N

N

N

N

Palpebral opening

N

N

N

N

N

N

Pupil appearance

N

N

N

N

N

N

Salivation

N

N

N

N

N

N

Lachrymation

N

N

N

N

N

N

Ringhting reflex

N

N

N

N

N

N

Back hair appearance

N

N

N

N

N

N

MORTALITY

0

0

0

0

0

0

Remarks

None

None

 

 

N: Normal / None (Convulsions, Tremors)

 

Table 4. Test item at 2000 mg/kg bw. Observation data sheet.

OBSERVATIONS:

FEMALES

FEMALES

T0 + 4 hours

Rf 0715

Rf 0716

Rf 0717

Rf 0727

Rf 0728

Rf 0729

Spontaneous activity

D

D

D

N

N

N

Preyer’s réflex (noise)

N

D

D

N

N

N

Repiratory rate

N

N

N

N

N

N

convulsions

N

N

N

N

N

N

tremors

N

N

N

N

N

N

Body temperature

N

N

N

N

N

N

Muscle tone

D

D

D

N

N

N

Palpebral opening

N

N

N

N

N

N

Pupil appearance

N

N

N

N

N

N

Salivation

N

N

N

N

N

N

Lachrymation

N

N

N

N

N

N

Ringhting reflex

D

D

D

N

N

N

Back hair appearance

N

N

N

N

N

N

MORTALITY

0

0

0

0

0

0

Remarks

None

None

 

 

N: Normal / None (Convulsions, Tremors)

D: Decreased/ Limited (Righting reflex)

 

Table 5. Test item at 2000 mg/kg bw. Observation data sheet.

OBSERVATIONS:

FEMALES

FEMALES

D1 to D14

Rf 0715

Rf 0716

Rf 0717

Rf 0727

Rf 0728

Rf 0729

Spontaneous activity

N

N

N

N

N

N

Preyer’s réflex (noise)

N

N

N

N

N

N

Repiratory rate

N

N

N

N

N

N

convulsions

N

N

N

N

N

N

tremors

N

N

N

N

N

N

Body temperature

N

N

N

N

N

N

Muscle tone

N

N

N

N

N

N

Palpebral opening

N

N

N

N

N

N

Pupil appearance

N

N

N

N

N

N

Salivation

N

N

N

N

N

N

Lachrymation

N

N

N

N

N

N

Ringhting reflex

N

N

N

N

N

N

Back hair appearance

N

N

N

N

N

N

MORTALITY

0

0

0

0

0

0

Remarks

None

None

 

 

N: Normal / None (Convulsions, Tremors)

Table 6. Body weight and weight gain in grams.

FEMALES

D0

D2

D2-D0

D7

D7-D0

D14

D14-D0

Rf 0715

201

207

6

240

39

269

68

Rf0716

207

222

15

251

44

271

64

Rf 0717

208

169

-39

193

-15

244

36

Rf 0727

209

218

9

249

40

271

62

Rf 0728

214

229

15

253

39

276

62

Rf 0729

197

208

11

235

38

259

62

MEAN

206.0

208.8

2.8

236.8

30.8

265.0

59.0

Standard deviation

6.1

21.2

20.8

22.6

22.6

11.7

11.5

Interpretation of results:
GHS criteria not met
Conclusions:
The LD50 of the test item is higher than 2000 mg/kg body weight by oral route in the rat. The LD50 cut-off of the test item may be considered to be higher than 5000 mg/kg body weight by oral route in the rat.
Executive summary:

The acute oral toxicity of the test item has been tested in accordance with OECD 423 and EU method B.1 tris, following GLP. The test item was administered to a group of 6 female Sprague-Dawley rats at the dose of 2000 mg/kg body weight by oral gavage. No mortality occurred during the study. An absence of body weight gain was noted on day 2 versus day 0. Then the body weight evolution of the animals remained normal during the study. A decrease of spontaneous activity (4/6), muscle tones (3/6), righting reflex (3/6) and Preyer's reflex (2/6) associated with an increase of salivation (2/6) was noted during the first hours of the test. The animals recovered a normal activity at 24 hours post dose. No others signs of systemic toxicity were noted.The macroscopic examination of the animals at the end of the study did not reveal treatment related changes. The LD50 of the test item is higher than 2000 mg/kg body weight by oral route in the rat. The LD50 cut-off of the test item may be considered to be higher than 5000 mg/kg body weight by oral route in the rat.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed
Dose descriptor:
LD50
Value:
5 000 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 study available
Quality of whole database:
Klimish score 1. GLP study.

Additional information

Key study: The acute oral toxicity of the test item has been tested in accordance with OECD 423 and EU method B.1 tris, following GLP. The test item was administered to a group of 6 female Sprague-Dawley rats at the dose of 2000 mg/kg body weight by oral gavage. No mortality occurred during the study.An absence of body weight gain was noted on day 2 versus day 0. Then the body weight evolution of the animals remained normal during the study.A decrease of spontaneous activity (4/6), muscle tones (3/6), righting reflex (3/6) and Preyer's reflex (2/6) associated with an increase of salivation (2/6) was noted during the first hours of the test. The animals recovered a normal activity at 24 hours post dose. No others signs of systemic toxicity were noted.The macroscopic examination of the animals at the end of the study did not reveal treatment related changes. The LD50 of the test item is higher than 2000 mg/kg body weight by oral route in the rat. The LD50 cut-off of the test item may be considered to be higher than 5000 mg/kg body weight by oral route in the rat.

Justification for classification or non-classification

Based on the available information (LD50 > 2000 mg/kg bw), the substance is not classified for acute toxicity according to CLP Regulation (EC) no. 1272/2008