Schiff bases, C11-14-tert-alkyl methylene

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Single dose, with 14 day observations. May 22-30, 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 (Acute Toxicity (Oral))

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1100 (Acute Oral Toxicity)

GLP compliance:

yes (incl. QA statement)

Test type:

acute toxic class method

Limit test:

no

Test material

Test material information

Constituent 1

Reference substance name:

Formaldehyde, reaction products with ethylenediamine

EC Number:

281-928-5

EC Name:

Formaldehyde, reaction products with ethylenediamine

Cas Number:

84066-92-2

IUPAC Name:

Formaldehyde, reaction products with ethylenediamine

Test material form:

liquid

Test animals

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

Species/strain: healthy Wistar rats, Crl: WI(Han) (Full Barrier)
Source: Charles River, 97633 Sulzfeld, Germany
Sex: male and female; the female animals were non-pregnant and nulliparous.
Age at the start of the treatment period: 7-8 weeks old

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

water

Details on oral exposure:

The test item was administered at a single dose by gavage using a feeding tube.
The test item was administered at a dose volume of 10 mL/kg body weight.

Doses:

The starting dose was selected to be 300 mg/kg body weight. No compound-related
mortality was recorded for any animal of step 1.Based on these results and according to
the acute toxic class method regime, a second step was performed at a dose of 300
mg/kg body weight. No compound-related mortality was recorded for any animal of
step 2. Based on these results and according to the acute toxic class method regime, a
third step was performed at a dose of 2000 mg/kg body weight. Compound-related
mortality was recorded for all animals of step 3. Based on these results and according to
the acute toxic class method regime no further testing was required.

No. of animals per sex per dose:

Sex: female, non-pregnant, nulliparous
Number of animals: 3 per step

Control animals:

no

Results and discussion

Effect levels

Sex:

female

Dose descriptor:

LD50

Effect level:

500 mg/kg bw

Based on:

test mat.

Clinical signs:

other: The most relevant clinical findings in the animals treated with the test item at a dose of 2000 mg/kg bw were reduced spontaneous activity, recumbency, ataxia, bradyxkinesia, kyphosis, wasp waist, piloerection, half eyelid-closure, diarrhoea.

Gross pathology:

Macroscopic findings of surviving animals:
At necropsy, only one of the surviving animals showed treatment-related macroscopic
findings.Necropsy of all other surviving animals did not show any treatment-related
finding.
Macroscopic findings of animals not having survived until the end of the observation
period:
Necropsy revealed bloated and bloody stomach and bloody intestine.

Any other information on results incl. tables

Results per step:

Step	Sex/ No.	Starting Dose (mg/kg)	Number         of Animals	Number of Intercurrent Deaths
Step1	Female/ 1-3	300	3	0
Step2	Female/ 4-6	300	3	0
Step3	Female/ 7-9	2000	3	3

Applicant's summary and conclusion

Interpretation of results:

Category 4 based on GHS criteria

Remarks:

Migrated information

Conclusions:

The median lethal dose of Formaldehyde, reaction product with ethylenediamine after a single oral administration to female rats, observed over a period of 14 days is: ATE cut-off (rat): 500 mg/ kg bw

Note that in a range-finder study, a dose of 1000 mg/kg/day was tolerated over 14 days and 800 mg/kg/day was tolerated over 28 days with limited adverse effects.