Reaction product of Maleic anhydride, 2-Ethylhexylamine and Triethanolamine

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Reaction product of Maleic anhydride, 2-Ethylhexylamine and Triethanolamine

EC Number:

939-488-3

Cas Number:

1471311-93-9

Molecular formula:

C18 H36 N2 O6

IUPAC Name:

Reaction product of Maleic anhydride, 2-Ethylhexylamine and Triethanolamine

Test material form:

liquid

Details on test material:

- Analytical purity: ca. 100 % (UVCB)
- Lot/batch No.: 85979609T0
- Stability under test conditions: The stability of the test item under storage conditions over the study period was guaranteed by the sponsor, and the sponsor holds this responsibility.
- Storage condition of test material: room temperature

Please note: This kind of substance was in the past handle under the CAS nr 85204-21-3.
After analytical characterization the substance was renamed and received a new CAS nr. Today the substance is characterized by the CAS 1471311-93-9 EC Number: 939-488-3 and handled under these Identifiers.

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Wiga GmbH
- Age at study initiation: Young adult animals (male animals approx. 8 weeks, female animals approx. 12 weeks)
- Weight at study initiation: males mean: 250.8 g; females mean: 206.4 g
- Fasting period before study: N/A
- Housing: individually
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: Acclimatization period of at least 5 days before the beginning of the experimental phase

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22°C +- 3°C
- Humidity (%): 30-70 %
- Air changes (per hr): The animals were housed in fully air-conditioned rooms.
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

TEST SITE
- Area of exposure: dorsal and dorsolateral parts of the trunk
- % coverage: at least 10% of the body surface
- Type of wrap if used: semiocclusive

REMOVAL OF TEST SUBSTANCE
- Washing (if done): with warm water
- Time after start of exposure: after 24 hours

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 1.77 mL/kg bw
- Constant volume or concentration used: yes

Duration of exposure:

24 hours

Doses:

2000 mg/kg

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: Individual body weights shortly before administration (day 0), weekly thereafter and on the last day of
observation. Recording of clinical signs several times on the day of administration, and at least once daily thereafter each workday for the individual animals. A check for any dead or moribund animals was made at least once each workday
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, gross pathology

Statistics:

not applicable

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality occurred.

Clinical signs:

No systemic clinical signs were observed during clinical examination.
Local effects males:
In two animals very slight erythema (grade 1) was seen on study day 1 and persisted in one animal until study day 2.
Well-defined erythema (grade 2) was noted in two further males on study day 1. In one of these animals grade 2 was noted again on study day 2 and decreased on study day 5 to very slight erythema (grade 1). In the other animal well-defined erythema decreased to very slight erythema on study day 2 and was noted until study day 5.
The one remaining male animal didn’t show any skin reactions.
Local effects females:
In four females well-defined erythema (grade 2) was noted on study day 1 which decreased in three of these animals to very slight erythema (grade 1) on study day 2 and persisted in one female until day 5 after application.
In the fourth female well-defined erythema persisted until study day 2. Thereafter very slight erythema was noted on study day 5 in this animal.
Slight erythema on study day 1 and 2 was observed in the one remaining female.

Body weight:

The mean body weight of the male animals increased within the normal range throughout the study period.
The mean body weight of the female animals did not adequately increase during the first post-exposure observation week, probably due to the bandage procedure, but increased during the second week within the normal range.

Gross pathology:

No macroscopic pathologic abnormalities were noted in the animals (5 males and 5 females) examined on the last day of observation.