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Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1992
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1992
Report date:
1992

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Version / remarks:
July, 1992
Deviations:
not specified
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
Didodecyl nonylphenyl phosphite
EC Number:
252-457-2
EC Name:
Didodecyl nonylphenyl phosphite
Cas Number:
35239-35-1
Molecular formula:
C39-H73-O3-P
IUPAC Name:
Phosphorous acid, didodecyl nonylphenyl ester
Constituent 2
Chemical structure
Reference substance name:
Dodecyl bis(4-nonylphenyl) phosphite
EC Number:
284-117-4
EC Name:
Dodecyl bis(4-nonylphenyl) phosphite
Cas Number:
84787-76-8
Molecular formula:
C42-H71-O3-P
IUPAC Name:
Phosphorous acid, dodecyl bis(4-nonylphenyl) ester
Constituent 3
Chemical structure
Reference substance name:
4-nonylphenyl ditridecyl phosphite
EC Number:
284-119-5
EC Name:
4-nonylphenyl ditridecyl phosphite
Cas Number:
84787-77-9
Molecular formula:
C41-H77-O3-P
IUPAC Name:
Phosphorous acid, 4-nonylphenyl ditridecyl ester
Constituent 4
Chemical structure
Reference substance name:
Bis(4-nonylphenyl) tridecyl phosphite
EC Number:
284-120-0
EC Name:
Bis(4-nonylphenyl) tridecyl phosphite
Cas Number:
84787-78-0
Molecular formula:
C43-H73-O3-P
IUPAC Name:
Phosphorous acid, bis(4-nonylphenyl) tridecyl ester
impurity 1
Reference substance name:
Tris(nonylphenyl) phosphite
EC Number:
247-759-6
EC Name:
Tris(nonylphenyl) phosphite
Cas Number:
26523-78-4
IUPAC Name:
tris(2-nonylphenyl) phosphite
impurity 2
Reference substance name:
Didodecyl phosphonate
EC Number:
244-325-8
EC Name:
Didodecyl phosphonate
Cas Number:
21302-09-0
Molecular formula:
C24H51O3P
IUPAC Name:
Di(n-dodecyl)hydrogen phosphate
impurity 3
Chemical structure
Reference substance name:
Phenol, 4-nonyl-, branched
EC Number:
284-325-5
EC Name:
Phenol, 4-nonyl-, branched
Cas Number:
84852-15-3
Molecular formula:
C15H24O
IUPAC Name:
4-Nonylphenol, branched
Test material form:
liquid
Specific details on test material used for the study:
TEST MATERIAL NAME (as stated in study report): TK 12437 (Trade Name: Irgastab CH 302)

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: Sponsor; Batch No. 08520495
- Expiration date of the lot/batch: July, 1996
- Purity: within the product specifications

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: room temperature

Test animals

Species:
rabbit
Strain:
New Zealand White
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Dr. K. Thomae GMBH, Chemisch-pharmazeutische Fabrik, D-7950 Biberach/Riss
- Weight at study initiation: 2360 to2560 g
- Housing: individually in metal cages
- Diet (e.g. ad libitum): Standard rabbit pellet - Nafag No. 814, Gossau, Switzerland; ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 +/-3 °C
- Humidity (%): 30-70 %
- Photoperiod (hrs dark / hrs light): 12 / 12

Test system

Type of coverage:
occlusive
Preparation of test site:
shaved
Vehicle:
unchanged (no vehicle)
Controls:
yes
Amount / concentration applied:
0.5 mL
Duration of treatment / exposure:
4 hours
Observation period:
7 days
Number of animals:
3 female animals
Details on study design:
An area of at least 36 cm was shaved on both flanks of the animals approximately 24 hours before treatment. A gauze patch (approx.. 12-16 cm ) bearing 0.5 ml of the test article was applied to the right flank of each animal. A control gauze patch was applied to the contralateral flank. Both patches were moistened before application with distilled water.

The patches were loosely covered with an aluininum foil (approx. 36 cm ) and held in place for 4 hours by an adhesive tape (Isoplast, Isoplast AG, CH-5200 Brugg).

The animals were checked daily for systemic Symptoms and mortality (only findings reported).

The skin reactions were evaluated 1, 24, 48, and 72 hours after removing the gauze patches according to the OECD scoring system.

Bodyweight was recorded at start and on days 3 and 7 of the test.

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
1
Max. score:
2
Reversibility:
fully reversible within: 7 days
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible within: 7 days
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
1.33
Max. score:
2
Reversibility:
fully reversible within: 7 days
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0.33
Max. score:
1
Reversibility:
fully reversible within: 48 hours
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0.33
Max. score:
1
Reversibility:
fully reversible within: 48 hours
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0.33
Max. score:
1
Reversibility:
fully reversible within: 48 hours
Irritant / corrosive response data:
see attached data table

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Remarks:
Not classified by CLP Criteria
Conclusions:
In a guideline (OECD 404) in vivo skin irritation study, Irgastab CH 302 was not classified as a non-irritant to the skin of albino rabbits.