1,4-Benzenedicarboxylic acid, dimethyl ester, manuf. of, by-products from

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

22 September 2009 - 01 October 2009

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study has been performed according to EC and/or OECD guidelines and in compliance with GLP principles.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.2500 (Acute Dermal Irritation)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

1,4-Benzenedicarboxylic acid, dimethyl ester, manuf. of, by-products from

EC Number:

273-521-6

EC Name:

1,4-Benzenedicarboxylic acid, dimethyl ester, manuf. of, by-products from

Cas Number:

68988-22-7

Molecular formula:

Molecular formula, molecular weight range, SMILES notation, InChi and structural formula are not available, because DMT byproducts (CAS # 68988-22-7) is a UVCB subsance.

IUPAC Name:

1,4-Benzenedicarboxylic acid, dimethyl ester, manuf. of, by-products from

Details on test material:

- Name of test material (as cited in study report): Terate® 091 Residue
- Substance type: Dark brown solid with soft lumps
- Physical state: Solid
- Analytical purity: 100%
- Composition of test material, percentage of components: by-product from the manufacture of 1,4-Benzenedicarboxylic acid, dimethyl ester
- Lot/batch No.: NB8322-091
- Expiration date of the lot/batch: 14 July 2010
- Stability under test conditions: Stable
- Storage condition of test material: At room temperature in the dark

Test animals

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Harlan France SARL, Gannat, France
- Age at study initiation: 17-20 weeks
- Weight at study initiation: 2842 - 3222 grams
- Housing:Animals were individually housed in labeled cages with perforated floors and shelters.
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: at least 5 days


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19.1 - 20.0ºC
- Humidity (%): 45 - 75%
- Air changes (per hr): approximately 15 air changes per hour
- Photoperiod (hrs dark / hrs light): 12/12


IN-LIFE DATES: From: 22 September 2009 To: 01 October 2009

Test system

Type of coverage:

semiocclusive

Preparation of test site:

shaved

Vehicle:

unchanged (no vehicle)

Controls:

not required

Amount / concentration applied:

0.5 gram of the unchanged test substance

Duration of treatment / exposure:

4 hours

Observation period:

up to 72 hours

Number of animals:

3

Details on study design:

TEST SITE
- Area of exposure: 2x3 cm
- % coverage: 100%
- Type of wrap if used: a metalline patch was mounted on Micropore tape which was wrapped around the abdomen and secured with Coban elastic bandage.


REMOVAL OF TEST SUBSTANCE
- Washing (if done): skin was cleaned of residual test substance using tap water and watery ethanol
- Time after start of exposure: 4 hours


SCORING SYSTEM:
The irritation was assessed according to the following numerical scoring system. At each observation, the highest scores given were recorded:

Erythema and eschar formation:
No erythema: 0
Very slight erythema (barely perceptible): 1
Well-defined erythema: 2
Moderate to severe erythema: 3
Severe erythema (beet redness) *: 4
*. Where signs of necrosis or corrosion (injuries in depth) prevent erythema scoring, the maximum grade for erythema (= 4) is given.

Oedema formation:
No oedema: 0
Very slight oedema (barely perceptible): 1
Slight oedema (edges of area well-defined by definite raising): 2
Moderate oedema (raised approximately 1 millimeter): 3
Severe oedema (raised more than 1 millimeter and extending beyond the area of exposure): 4

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

other: all animals

Time point:

other: 1, 24, 48 and 72 hours after exposure

Score:

0

Max. score:

4

Reversibility:

other: no irritation observed

Results 2

Irritation parameter:

edema score

Basis:

other: all animals

Time point:

other: 1, 24, 48 and 72 hours

Score:

0

Max. score:

4

Reversibility:

other: no irritation observed

Irritant / corrosive response data:

No skin irritation or corrosion was caused by 4 hours exposure.

Other effects:

Brown staining of the treated skin by the test substance was observed throughout the observation period, which did not hamper the scoring of the skin reactions.

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

Based on these results Terate® 091 Residue does not have to be classified and has no obligatory labeling requirement for skin irritation according to the:
- Regulation (EC) No 1272/2008 on classification, labeling and packaging of substances and mixtures,
- EC criteria for classification and labeling of dangerous substances and preparations (Council Directive 67/548/EEC and all adaptations to technical progress and amendments of this Directive published in the Official Journal of the European Union),
- Globally Harmonized System of Classification and Labeling of Chemicals (GHS) of the United Nations (2007)

Executive summary:

Skin irritancy of the test substance was determined in a guideline study (OECD TG 404) in rabbits. The test substance was found to be not irritating.