Alkane-alpha,omega-diyl bis{[(trimethoxysilyl)propyl]carbamate}_M2

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2013-01-28 to 2013-02-22

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Guideline study; GLP study

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:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Version / remarks:

(2002)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

2008

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.2500 (Acute Dermal Irritation)

Version / remarks:

1998

Deviations:

no

GLP compliance:

yes

Test material

Test material information

Constituent 1

Test material form:

liquid: viscous

Details on test material:

Characteristics: clear, colourless, viscous

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, Löhndorf (Germany)
- Sex: female
- Age: approx. 5.5 - 10.5 months
- Weight at study initiation: 2.9 kg to 3.6 kg
- Housing: single
- Diet: ad libitum, ssniff K-H (ssniff Spezialdiäten GmbH, 59494 Soest, Germany)
- Water: ad libitum, tap water
- Acclimatisation period: at least 20 days
- Controls: untreated skin surrounding the application area
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20°C +/- 3 °C
- Humidity (%): 30% - 70%
- Photoperiod (hrs dark / hrs light): 12 hour light/12 hour dark cycle

Test system

Type of coverage:

semiocclusive

Preparation of test site:

shaved

Vehicle:

unchanged (no vehicle)

Controls:

yes, concurrent no treatment

Amount / concentration applied:

0.5 ml test item/patch and animal

Duration of treatment / exposure:

4 hour(s)

Observation period:

Postexposure period: 72 hours (Because no effects have been observed the period of observation is not 14 days but 72 hours.)

Number of animals:

3

Details on study design:

ADMINISTRATION/EXPOSURE
- Preparation of test substance: unchanged
- Area of exposure: dorsal area of trunk, shaved 24 hours in advance,  approx. 6 cm2
- Concentration: 0.5 mL of the test item was applied to the test site (area: approx. 6 cm2).
- Occlusion: gauze patch held in place by semi-occlusive non-irritating  tape dressing
- Washing: at the end of the exposure time no residual test item had to be removed.
- Inital test: As there was no evidence of the test item producing severe irritancy or corrosion by the test item, a single patch was applied to one
animal for 4 hours.
- Confirmatory test: As no corrosive or severe irritant effects were observed in the initial test, 2 further animals were employed 24 hours after start
of the initial test.
EXAMINATIONS
- Examination time points: 60 minutes, 24, 48, 72 hours,
- Scoring system: Draize (0-4 possible scores each for erythema/eschar  and for edema)

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

overall irritation score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

0

Results 2

Irritation parameter:

erythema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

0

Results 3

Irritation parameter:

edema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

0

Irritant / corrosive response data:

AVERAGE SCORE
- Erythema: 0
- Edema: 0

Other effects:

no other effects

Any other information on results incl. tables

Findings                                Examination                  Skin irritation scores

of the skin                            schedule                      

animal no.

1             2            3

E/Oe          E/Oe        E/Oe

          500 mg substance/patch/animal

 

erythema and

eschar formations/                           before dosing          0/0           0/0          0/0

oedema formation

time after removal

of the patch

(4-hour exposure)

60 min                        0/0            0/0          0/0

24 hours                          0/0            0/0          0/0

48 hours                          0/0           0/0          0/0

72 hours                      0/0            0/0          0/0

 

0   no pathological findings    

E   erythema and eschar formations 

Oe  oedema

Applicant's summary and conclusion

Conclusions:

Under the present test conditions, none of the three male rabbits exposed for 4 hours to 500 mg test substance/patch (semi-occlusive conditions) showed any skin reaction. There were no systemic intolerance reactions. Therefore, the test item was non-irritating to skin, hence no labelling is required.

Executive summary:

The purpose of this study was to examine the test item for acute dermal irritation/corrosion properties in rabbits (patch test), according to OECD guideline 404, EC method B.4.and OCSPP guideline 870.2500.

Under the present test conditions, none of the three male rabbits exposed for 4 hours to 500 mg test substance/patch (semi-occlusive conditions) showed any skin reaction. There were no systemic intolerance reactions. Therefore, the test item was non-irritating to skin, hence no labelling is required.