Reaction mass of 2-methyldecan-1-al and undecanal

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

From 12 FEB 1985 to 6 MAR 1985

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Basic data given: comparable to guidelines

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1985

Report date:

1985

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Deviations:

yes

Remarks:

: substance composition or purity not stated

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

n-undecanal

IUPAC Name:

n-undecanal

Constituent 2

Reference substance name:

2-methyl decanal

IUPAC Name:

2-methyl decanal

Constituent 3

Reference substance name:

n/i-undecanal

IUPAC Name:

n/i-undecanal

Details on test material:

- Name of test material (as cited in study report): n/i-Undecanal. Proportions of n- or iso-undecanal not reported.
- Substance type: colourless
- Physical state: liquid
- Storage condition of test material: room temperature

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: A. Tuck & Sons Limited, Battlesbridge, UK
- Age at study initiation: 4 to 6 weeks
- Weight at study initiation: males: 128-146 g, females: 127-139 g
- Fasting period before study: overnight
- Housing: in polypropylene cages with sawdust bedding in groups of five by sex
- Diet: standard laboratory rodent diet (Rat & Mouse Expanded Diet No. 1, Special Diet Services Limited, Witham, UK), ad libitum
- Water: tap water, ad libitum
- Acclimation period: at least 5 days


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22+/- 3
- Humidity (%): 40-50
- Air changes (per hr): ~10
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

MAXIMUM DOSE VOLUME APPLIED: 6.08 mL/kg

Doses:

5000 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: 0.5, 1, 2, 3, 4 and 5 hours following dosing; on subsequent days at least once
- Frequency of weighing: weekly (on day 0, 7, 14)
- Necropsy of survivors performed: yes

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 5 000 mg/kg bw

Remarks on result:

other: no animal died within the observation period

Mortality:

- no deaths occured

Clinical signs:

- shortly after dosing: abnormal body carriage (hunched posture), lethargy, pilo-erection and a decreased respiratory rate
- in some animals: diarrhoea and ptosis
- recovery of all rats complete at day 3 (judged by external appearance and behaviour)

Body weight:

- body weight development was not impaired

Gross pathology:

- in three rats congestion of the lungs only
- no macroscopic abnormalities seen in any of the remaining rats

Applicant's summary and conclusion

Interpretation of results:

not classified

Remarks:

Migrated information Criteria used for interpretation of results: other: CLP Regulation

Conclusions:

Under the tested conditions, the substance did not reveal clear acute oral toxicity.

Executive summary:

The test item (purity: not stated) was administered to 5 male and 5 female Sprague-Dawley albino rats by gavage at the limit dose of 5000 mg/kg bw according to testing guideline OECD 401. Following dosing minor clinical signs (as e.g. hunched posture, pilo-erection as well as diarrhoea or ptosis) occurred, but were all reversible within 3 days. During the 14 days observation period no animal died. Subsequent gross pathology revealed congestions of the lungs in three rats, but no other macroscopic changes were seen. The given results lead to a LD50 > 5000 mg test item per kg bw (Ruhrchemie AG/Safepharm, 1985).

The proportions of n- or iso-undecanal of the test material was not reported. Read Across wsas therefore considered. Refer to the discussion field of the endpoint summary for detailed justification of read across.

This study was judged to be reliable with restrictions (RL2), due to missing information on substance composition and purity.