3-aminomethyl-3,5,5-trimethylcyclohexan-1-ol

Endpoint summary

Description of key information

The test substance is of low oral acute toxicity with an oral LD50 ( rat) of > 2000 mg/kg bw (Reprotox 1980).

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:

1980-08 to 1980-10

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Principles of method if other than guideline:

comparable to guideline Methode OECD 401

GLP compliance:

no

Test type:

standard acute method

Limit test:

no

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

- Source: W. Gassner, Sulzfeld
- Weight at study initiation: 110-130 g
Environmental conditions:
Keeping of animals: diet: Ssniff R 10 pellets;
Water ad libitum;
Room temperature 22°C +/- 1C°C
Light 12 hours per day,
Diet deprived 16 hours before oral application of test substance

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

- Doses: calculated from volume
- Doses per time period: single dose (gavage)

Doses:

1.6 / 2.0 / 2.5 / 3.2 ml/kg bw

No. of animals per sex per dose:

5 male and 5 female per dose

Control animals:

yes

Remarks:

4.0 ml Aqua dest/kg bw.

Details on study design:

- Volume administered or concentration: undiluted test substance: 1.6 / 2.0 / 2.5 / 3.2 ml/kg bw, control animals: 4.0 ml Aqua dest/kg bw.
- Post dose observation period: 14 days
EXAMINATIONS: 
- Frequency of observations: The animals were observed for deaths or overt signs of toxicity twice after dosing and subsequently once daily for fourteen days.

central nervous system, lung, heart, heart sac, stomach,  large intestine, small intestine, liver, spleen, kidneys, serosa, lymph  nodes, gonads, perineum

Statistics:

- LD50 calculation: according to Weil, C.S. (Biometrics, 8, 249, 1952)

Preliminary study:

not applicable

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

2.1 mL/kg bw

95% CL:

>= 1.9 - <= 2.3

Remarks on result:

other: Volume/kg bw

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

2 142 mg/kg bw

95% CL:

> 1 938 - < 2 346

Remarks on result:

other: Mass/kg bw

Mortality:

- Time of death: within 24 hours
- Number of deaths at each dose 14 days after substance application: control: 0/10;   1.6 ml/kg: 0/10 ;  2.0 ml/kg: 7/10 ; 2.5 ml/kg: 7/10; 3.2 ml/kg: 10/10;   
- LD50 (14 days) = 2.10 ml/kg    confidence interval: 1.9 - 2.3 ml/kg  

Clinical signs:

other: increase of locomotive behaviour, piloerection, sedation,  in higher  dose groups also increasing gnawing

Gross pathology:

NECROPSY FINDINGS:
Moderate hyperemia, congestion of liver,  reddening of stomach and bloody intestinal mucosa of dead animals.
No findings at the end of post exposure period.

table of results see under attached background material

Conclusions:

Treatment related mortality and other sublethal symptoms were observed in rats within the 14 day post-dosing period for the doses used in this acute oral toxicity study. The LD50 (oral) was calculated to be LD50 (14 days) = 2.10 ml/kg.  

Executive summary:

The test item was applied once to 4 dose-groups of rats (5 male and 5 female Sprague Dawley rats per dose-group) in doses of 1.6 / 2.0 / 2.5 / 3.2 ml/kg bw of undiluted test item. Control animals was applied once to 4.0 ml aqua dest/kg bw.

The observation period was 14 days.

In all doses groups a increase of locomotive behaviour, piloerection, sedation,  in higher  dose groups also increasing gnawing was observed beginning 1 h after dosing and lasting 24 hours.

At the highest dose (3.2 ml/kg bw) all animals died within 24 hours after oral application of the test item. Necroscopy findings were moderate hyperemia, congestion of liver,  reddening of stomach and bloody intestinal mucosa. There were no findings at the end of post exposure period.

According to this study the LD50 value (oral) was determined to be 2.1 ml/kg bw in rats for the test item

Endpoint conclusion

Endpoint conclusion:

adverse effect observed

Dose descriptor:

LD50

Value:

2 142 mg/kg bw

Quality of whole database:

The study was conducted in equivalent to OECD 401, is well documented, meets generally accepted scientific principles and is acceptable for assessment.

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Endpoint conclusion

Endpoint conclusion:

no study available

Justification for classification or non-classification

Based on the results of the acute oral study and according to the criteria of EC Regulation 1272/2008 the test item has a low acute toxicity if swallowed (LD50 (rat) > 2000 mg/kg bw). Therefore, the test substance must not be classified.