Dimethoxymethyloctadecylsilane

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

13 May - 13 Jun 2002

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2002

Report date:

2002

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Freie und Hansestadt Hamburg, Behörde für Arbeit, Gesundheit uns Soziales, Germany

Test material

Test material information

Constituent 1

Reference substance name:

Dimethoxymethyloctadecylsilane

EC Number:

274-936-5

EC Name:

Dimethoxymethyloctadecylsilane

Cas Number:

70851-50-2

Molecular formula:

C21H46O2Si

IUPAC Name:

dimethoxymethyloctadecylsilane

Details on test material:

- Name of test material (as cited in study report): Silan ODM-Dimethoxy
- Physical state: colourless liquid
- Storage condition of test material: at room temperature, dry, tightly closed, dark

Test animals

Species:

rabbit

Strain:

Himalayan

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: LPT, Laboratory of Pharmacology and Toxicology KG, Loehndorf, Germany
- Age at study initiation: approximately 4 months
- Weight at study initiation: 1.9-2.2 kg
- Fasting period before study: no
- Housing: Single housing before and after the exposure period. During exposure the animals were kept singly in restrainers, which allowed free movement of the head but prevented a complete body turn.
- Diet: ssniff K-H (ssniff Spezialdiäten GmbH, Soest, Germany), ad libitum
- Water: tap water, ad libitum
- Acclimation period: at least 20 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20±3
- Humidity (%): 55± 15
- Photoperiod (hrs dark / hrs light): 12/12

Test system

Type of coverage:

semiocclusive

Preparation of test site:

shaved

Vehicle:

unchanged (no vehicle)

Controls:

other: untreated skin site served as control

Amount / concentration applied:

TEST MATERIAL
- Amount applied (volume or weight with unit): 0.5 mL

Duration of treatment / exposure:

4 h

Observation period:

72 h
Reading time points: 24, 48 and 72 h

Number of animals:

3 males

Details on study design:

TEST SITE
- Area of exposure: approximately 6 cm²
- Type of wrap if used: Test site covered with a gauze patch, which was held in contact to the skin by means of a semi-occlusive dressing (non-irritating tape).

REMOVAL OF TEST SUBSTANCE
No residual test substance had to be removed

SCORING SYSTEM: Draize scoring system

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

mean

Remarks:

out of all 3 animals

Time point:

other: mean over 24, 48, 72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Results 2

Irritation parameter:

edema score

Basis:

mean

Remarks:

out of all 3 animals

Time point:

other: mean over 24, 48, 72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Irritant / corrosive response data:

No erythema and oedema reactions were observed 60 min after patch removal or at later time points in any animal. No other skin reactions were observed.

Other effects:

No systemic intolerance reactions were observed.

Applicant's summary and conclusion

Interpretation of results:

other: CLP/EU GHS criteria are not met, no classification required according to Regulations (EC) No 1272/2008

Conclusions:

A reliable study performed in accordance with OECD 404 and GLP found the test material to be not irritating to the skin of rabbits. No erythema or oedema reactions were observed at any time point. No other skin reactions or systemic effects were observed.