Diisobutyl hexahydrophthalate

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 12-27, 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP compliant study conducted to recognised international test guidelines

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method B.3 (Acute Toxicity (Dermal))

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1200 (Acute Dermal Toxicity)

Deviations:

no

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Diisobutyl hexahydrophthalate

EC Number:

275-069-5

EC Name:

Diisobutyl hexahydrophthalate

Cas Number:

70969-58-3

Molecular formula:

C16H28O4

IUPAC Name:

bis(2-methylpropyl) cyclohexane-1,2-dicarboxylate

Details on test material:

- Name of test material : DIBE (diisobutylhexahydrophthalate)
- Physical state: Liquid
- Lot/batch No.: T60211/349
- Expiration date of the lot/batch: 2012-12-15
- Storage condition of test material: room temperature, protected from light

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source Charles River Italia S.p.A.
- Age at study initiation:7 - 9 weeks old
- Weight at study initiation:224 - 299 g
- Housing: policarbonatecages measuring 42 .5 x 26.6 x 18 cm with stainless stell mesh lid and floor
- N° of animal/cage: Individually caged (both during acclimatisation and study)
- cage try control: Daily inspected and changed as necessary (at least 3 times/week)
- Diet: 4 RF 18 (Mucedola S.r,l)
- Diet supply: ad libitum
- Water :ad libitum
- Acclimation period:at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22°c +/- 2°c
- Humidity (%):55% +/- 15%
- Air changes: 15 to 25 air changes per hour
- Photoperiod: Artificial (fluorescent tubes) , daily light/dark cycle of 12/12 hours

IN-LIFE DATES: From: 2012-06-12 To: 2012-06-27

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

TEST SITE
- Area of exposure:approximately 10% of body surface
- Type of wrap if used:synthetic film

REMOVAL OF TEST SUBSTANCE
- Washing : After exposure , the adhesive bandage and gouze patch were removed. The treatment area was cleaned by gentle swabbing of the skin with cotton wool soaked with lukewarm water.
- Time after start of exposure:24 hours

TEST MATERIAL
- Amount(s) applied : Aliquots were weighed accordingly to the body weight of each animal measured prior dosing
- Constant volume or concentration used: yes
- Frequency of treatment: once only , on the day of dosing
- Treatment area preparation: on the day before dosing

Duration of exposure:

24 hours

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

5 male and 5 female rats

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days , termination on day 15.
- Frequency of observations and weighing:Observations - 1,2 and 4 hours after first dosing and daily thereafter for 14 days. Weighing - Days -1, 1, 8 and 15
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight,organ weights, histopathology, other: necropsy was carried out on all animals (gross necropsy examination for both internal and external abnormalities, with particular attention to the treatment site. All abnormalities were recorded.

Results and discussion

Effect levels

Effect levels 1

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Effect levels 2

Sex:

male

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

None during 14 day post-exposure observation period

Clinical signs:

other: No signs observed considered to be of significance

Gross pathology:

No abnormal changes considered to be of significance

Other findings:

None

Any other information on results incl. tables

 

 

 

 

 

 

Applicant's summary and conclusion

Interpretation of results:

not classified

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The acute toxicity of the substance was investigated following dermal administration of a single dose to the rat at 2000 mg/kg. No mortality occurred following dosing and no signs of toxicity were observed. The lack of mortality demonstrates the LD50 to be greater than 2000 mg/kg.

Executive summary:

The acute toxicity of the substance has been investigated following dermal administration of a single dose to the rat at 2000 mg/kg. utilising OECD/EU test methods. No mortality occurred following dosing and no signs of toxicity were observed. The lack of mortality demonstrates the LD50 to be greater than 2000 mg/kg.