2,2'-(octadec-9-enylimino)bisethanol

Endpoint summary

Description of key information

LD50 = 1260 mg/kg bw. The only study available is an oral LD50 study on 2,2'-(Octadec-9-enylimino)bisethanol  CAS No 25307-17-9, the study is reliability 1 GLP compliant to OECD Guideline 401.

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-December 1986

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Complete report according to guidelines/standards.

Qualifier:

according to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

GLP compliance:

yes

Test type:

standard acute method

Limit test:

no

Species:

rat

Strain:

other: Sprague-Dawley CFY

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Interfauna (UK) Ltd., Wyton, UK
- Age at study initiation: 5-8 weeks
- Weight at study initiation: 123-152 g (males), 120-146 g (females)
- Fasting period before study: overnight prior to dosing until ca. 2 hours after dosing
- Housing: 5/sex in solid floor polypropylene cages with sawdust bedding
- Diet (e.g. ad libitum): ad lib
- Water (e.g. ad libitum): ad lib
- Acclimation period: at least 5 days


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19-23
- Humidity (%): 45-65
- Air changes (per hr): ca. 15
- Photoperiod (hrs dark / hrs light): 12/12


IN-LIFE DATES: From: 7 November To: 10 December 1986

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

VEHICLE
- Concentration in vehicle: neat test compound was used

MAXIMUM DOSE VOLUME APPLIED: 2.20 ml/kg bw

Doses:

1000, 1260, 1587, 2000 mg/kg bw

No. of animals per sex per dose:

5

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: observations were made 1 and 4 h after dosing and once daily thereafter. BW were
measured weekly and at death
- Necropsy of survivors performed: yes

Statistics:

Method of Weil CS, Biometrics (1952), 8, 249

Preliminary study:

A preliminary study was carried out using 2 groups of one male and one female each. Dose levels were 500 and 2000 mg/kg bw.
At 500 mg/kg the 2 animals survived, whereas both animals died at 2000 mg/kg bw.

Sex:

male/female

Dose descriptor:

LD50

Effect level:

1 260 mg/kg bw

95% CL:

1 053 - 1 508

Sex:

male

Dose descriptor:

LD50

Effect level:

1 309 mg/kg bw

95% CL:

1 024 - 1 674

Sex:

female

Dose descriptor:

LD50

Effect level:

> 1 000 - < 1 587 mg/kg bw

Mortality:

All deaths occurred 2-3 days after treatment.

Clinical signs:

other: Major signs of toxicity noted in all dose groups during the day of dosing were hunched posture, pilo-erection, decreased respiratoryrate, increased salivation and ptosis. Surviving animals treated with 1000 mg/kg continued to show signs of toxicity on day

Gross pathology:

Common abnormalities noted at necropsy of decedents were congested or abnormally red lungs, dark livers, haemorrhage of the
gastric mucosa and congestion of the small intestines. Necropsy of animals killed at the end of the study revealed scattered
white thickened or raised areas on the non-glandular region of the stomach. The liver of two animals treated with 2000 mg/kg was adhering to the stomach. One decedent treated with 1000 mg/kg and two animals treated with 1587 mg/kg were cannabalised. No
necropsy was performed.

Other findings:

No data

Mortality data

Dose level (mg/kg bw)	Deaths
	Male	Female	Total	%
1000	0/5	1/5	1/10	10
1260	3/5	3/5	6/10	60
1587	4/5	4/5	8/10	80
2000	3/5	4/5	7/10	70

Interpretation of results:

Category 4 based on GHS criteria

Remarks:

Migrated information

Conclusions:

The LD50 value was calculated to be 1260 mg/kg bw with 95% confidence limits of 1053 and 1508 mg/kg bw. The test compound was classied in Category IV according to OECD-GHS.

Executive summary:

A study was performed to determine the acute oral toxicity of the test material in the Sprague-Dawley CFY strain rat. The study was designed to comply with the recommendations of the OECD Guidelines for Testing of Chemicals (1981) No. 401 "Acute Oral Toxicity". Following a range-finding study, four groups, each of ten fasted animals (five males and five females) were given a single oral dose of undiluted test material, at dose levels of 1000 to 2000 mg/kg bodyweight. Deaths were noted two to three days after treatment. Major signs of toxicity noted during the day of dosing were hunched posture, pilo-erection, lethargy , decreased respiratory rate, increased salivation and ptosis. Less frequent signs of ataxia, pallor of the extremities, diarrhoea, diuresis, chromodacryorrhoea, tiptoe gait, emaciation, red/brown staining around the snout/eyes were also noted. Signs of reaction continued to be noted up to three to fourteen days after treatment. Surviving animals treated with 1000 mg/kg showed expected body weight gains over the study period. Effects on body weight were noted in other dose groups during the first week but all animals recovered to show expected body weight gains over the second week. Necropsy of decedents revealed congested or abnormally red lungs, dark livers , haemorrhage of the gastric mucosa with congestion of the small intestines. Necropsy of animals killed at the end of the study revealed thickened or raised white areas on the non-glandular region of the stomach. The acute oral median lethal dose (LDS0) and 95% confidence limits were found to be:

All animals: 1260 (1053 - 1508) mg/kg body weight

Males only: 1309 (1024 - 1674) mg/kg body weight

Females only: between 1000 and 1587 mg/kg body weight (best estimate).

Endpoint conclusion

Endpoint conclusion:

adverse effect observed

Dose descriptor:

LD50

Value:

1 260 mg/kg bw

Quality of whole database:

Study of adequate quality, consistent with information within group of primary fatty amines with 2 EO.

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

The only study available is an oral LD50 study (According to OECD 401 and GLP compliant) on 2,2'-(Octadec-9-enylimino)bisethanol, CAS No. 25307-17-9, resulting to LD50 of 1260 (1053 - 1508) mg/kg body weight. Necropsy of the decedents showed haemorrhage of the gastric mucosa with congestion of the small intestines, and necropsy of animals killed at the end of the study revealed thickened or raised white areas on the non-glandular region of the stomach. This is indicative that the acute toxicity is mainly caused via local, corrosive, effects on the Gastro-intestinal system.

 

2,2'-(Octadec-9 -enylimino)bisethanol is corrosive to the skin. Testing for acute dermal toxicity is therefore not justified. Toxicity following dermal exposure is characterised by local tissue damage, rather than the result of percutaneously absorbed material. For corrosive substances, the use of protective gloves and other equipment, such as face shields, aprons and good work practices are mandatory. Consequently, the occurrence of substantial dermal exposure of amounts comparable to the levels for acute oral toxicity is unlikely.

2,2'-(Octadec-9-enylimino)bisethanol is a liquid with a low vapour pressure, and exposure to vapours would be negligible at ambient temperatures. Possible inhalation would have to involve aerosol (of large) droplets that will deposit mainly on upper airways. Due to the corrosive properties of the substance, local respiratory irritation can be expected to represent the first, and most prominent, effects following inhalation of aerosols.

Based on the viscosity being 147 mPa.s at 20ºC and a density of 0.907 g/cm3 the Kinematic viscosity would be 151 mm2/s. It is therefore unlikely the Kinematic viscosity would be less than 20.5 mm2/s at 40ºC, therefore an aspiration hazard is not expected.

Justification for classification or non-classification

The LD Value of 1260 mg/kg is considered correct and will lead to CLP Category 4 for acute oral toxicity.

Due to corrosive properties the actute toxicity has not been investigated via dermal and inhalation routes. Local effects are considered to take precedence over systemic toxicity.

An aspiration hazard is not expected.