Registration Dossier
Registration Dossier
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EC number: 947-924-9 | CAS number: -
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 16. Dec 1986 - 06. Jan 1987
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 987
- Report date:
- 1987
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
- Deviations:
- yes
- Remarks:
- test item was applied as 77% paste in water
- GLP compliance:
- yes
Test material
- Reference substance name:
- Phosphoric acid, dodecyl ester, potassium salt
- EC Number:
- 254-414-3
- EC Name:
- Phosphoric acid, dodecyl ester, potassium salt
- Cas Number:
- 39322-78-6
- Molecular formula:
- not applicable
- IUPAC Name:
- Reaction mass of potassium didodecylphosphate and dipotassium dodecylphosphate and water
- Test material form:
- semi-solid (amorphous): gel
- Remarks:
- migrated information: paste
Constituent 1
Test animals
- Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Hoechst Ag, Kastengrund, conventional breed
- Age at study initiation: 3-5 months
- Weight at study initiation: 2,3 - 3,4 kg
- Housing: single cages
- Diet (e.g. ad libitum): Altromin 2123 (Altromin GmbH, Lage/Lippe, Germany) ad libitum, 15 g hay/day
- Water (e.g. ad libitum): water ad libitum
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 +/- 3°C
- Humidity (%): 50 +/-20 %
- Photoperiod (hrs dark / hrs light): 12
IN-LIFE DATES: From: 16. Dec. 1986 To: 06. Jan. 1987
Test system
- Type of coverage:
- semiocclusive
- Preparation of test site:
- shaved
- Vehicle:
- water
- Controls:
- not required
- Amount / concentration applied:
- 500 mg of 77% test substance in water
- Duration of treatment / exposure:
- 4 h
- Observation period:
- a. 30-60 min post applicationem
b. 24 h post applicationem
c. 48 h post applicationem
d. 72 h post applicationem
e. 7 d post applicationem
f. 14 d post applicationem
g. 21 d post applicationem - Number of animals:
- 3
- Details on study design:
- TEST SITE
- Area of exposure: 2.5 x 2.5 cm
- % coverage: 100 %
- Type of wrap if used: The substance was applied over the whole surface of a 2.5 x 2.5 cm cellulose patch on a piece of surgical plaster. The plaster was fixed to the prepared skinarea and covered with a semiocclusive bandage.
REMOVAL OF TEST SUBSTANCE
- Washing (if done): with warm water
- Time after start of exposure: 4 h
SCORING SYSTEM:
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) to slight eschar formation (lesion in depth).........4
Oedema
No oedema...................................................................................................................................0
very slight oedema (barely perceptible)..................................................................................1
slight oedema (edges of area well defined by definite raising)............................................2
moderate oedema (raised approximately 1mm)....................................................................3
severe oedema (raised more than 1mm and extending beyond area of exposure.........4
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Basis:
- mean
- Time point:
- other: 24, 48, 72 h
- Score:
- 2.89
- Max. score:
- 4
- Reversibility:
- fully reversible within: 21 d
- Irritation parameter:
- edema score
- Basis:
- mean
- Time point:
- other: 24, 48, 72 h
- Score:
- 1.33
- Max. score:
- 4
- Reversibility:
- fully reversible within: 14 d
- Irritation parameter:
- erythema score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 4
- Max. score:
- 4
- Reversibility:
- fully reversible within: 21 d
- Irritation parameter:
- erythema score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 2
- Max. score:
- 4
- Reversibility:
- fully reversible within: 7 d
- Irritation parameter:
- erythema score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 2.6
- Max. score:
- 4
- Reversibility:
- fully reversible
- Remarks:
- 7 d
- Irritation parameter:
- edema score
- Basis:
- animal #1
- Time point:
- 24/48/72 h
- Score:
- 2.3
- Max. score:
- 4
- Reversibility:
- fully reversible within: 14d
- Irritation parameter:
- edema score
- Basis:
- animal #2
- Time point:
- 24/48/72 h
- Score:
- 0.6
- Max. score:
- 4
- Reversibility:
- fully reversible within: 14 d
- Irritation parameter:
- edema score
- Basis:
- animal #3
- Time point:
- 24/48/72 h
- Score:
- 1
- Max. score:
- 4
- Reversibility:
- fully reversible within: 14 d
- Other effects:
- Treated skin areas were mostly dry and rough.
Applicant's summary and conclusion
- Interpretation of results:
- irritating
- Remarks:
- Migrated information Criteria used for interpretation of results: EU
- Conclusions:
- With reference the reported scores and the reversibility of the observed effects the test item has to be classified as irritant to the skin (H315 - causes skin irritation) according to the criteria laid down in the EU Classification Labelling and Packaging Regulation (1272/2008/EC).
- Executive summary:
The test item was tested for its skin irritant properties in 3 New Zealand White rabbits. The study was performed according to OECD Guideline 404. The only deviation was that the test item was applied as 77% paste in water, but since according to the guideline dry powders have to be moistened, the testing conditions and results are considered to be the same. Effects on the skin (erythema grades up to 4 and edema scores up to 3) were observed in all animals 24 hours after application. These signs were reversible within the 21 days observation period. With reference the reported scores and the reversibility of the observed effects the test item has to be classified as irritant to the skin (H315 - causes skin irritation, skin irritant category 2) according to the criteria laid down in the EU Classification Labelling and Packaging Regulation (1272/2008/EC).
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