Registration Dossier
Registration Dossier
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EC number: 947-842-3 | CAS number: -
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vivo
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 2008
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Cross-reference
- Reason / purpose for cross-reference:
- read-across source
Reference
- Endpoint:
- skin irritation / corrosion, other
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- other information
- Justification for type of information:
- Justification is provided in the separate statement.
- Reason / purpose for cross-reference:
- assessment report
- Reason / purpose for cross-reference:
- assessment report
- Reason / purpose for cross-reference:
- assessment report
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The skin irritation property of the registration substance sodium N-lauroyl glutamate is derived based on the read-across to Sodium N-cocoyl glutamate and Sodium N-cocoyl glycinate. No skin irritating property can be reliably derived.
- Executive summary:
The skin irritation property of the registration substance, sodium N-lauroyl glutamate, is derived based on the read-across to sodium N-cocoyl glutamate and sodium N-cocoyl glycinate.
The registration substance and the read-across sources are amides of fatty acids and amino acids and can be characterized as "N-fatty acyl amino acids", of which endogeous occurence and metabolism are known. Based on the comparable chemical structure, comparable phys-chem data and expected comparable metabolism, these compound are likely exhibit comparable toxicity profiles.
Sodium N-cocoyl glutamate is investigated for its skin irritation property according to the OECD 404. 0.5 ml of the test material was applied to the rabbit skin semi occusively for 4 hours. Slight erythema was found in two animals out of three and these effect were reverseible. Sodium N-cocoyl glutamate is not skin irritating.
Sodium N-cocoyl glycinate is investigated for its skin irritation property according to the OECD 404. 0.5 ml of the test material was applied to the rabbit skin semi occusively for 4 hours. Well-defined and mild erythea and edema were found in all treated animals and these effects were reversible. Sodium N-cocoyl glycinate is not skin irritating.
Sodium N-cocoyl glycinate was investigated for its skin irritation property according to the OECD 439. 10 mg of test compound was applied topically to the EPISKIN-SM tissue for 15 minutes followed by a 42 hour post incubation period and immediate determination of cytotoxic effects via MTT reduction assay. No significant effect on the cell viability was obtained. Sodium N-cocoyl glycinate is not skin irritating.
Likewise the registration substance, sodium N-lauroyl glutamate is considered as not skin irritating.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
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)
Test material
- Reference substance name:
- Sodium cocoyl glycinate (SCG) [INCI]
- IUPAC Name:
- Sodium cocoyl glycinate (SCG) [INCI]
Constituent 1
Test animals
- Species:
- rabbit
- Strain:
- New Zealand White
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Harlan Netherlands BV
- Age at study initiation: 14 weeks (males, females)
- Weight at study initiation: 2.2 kg (male); 2.5 kg (females)
- Housing: individually in stainless steel cages
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: yes
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17 - 23 °C
- Humidity (%): 30 - 70 %
- Air changes (per hr): 10 - 15 per hour
- Photoperiod (hrs dark / hrs light): 12 hour cycle dark / light
Test system
- Type of coverage:
- semiocclusive
- Preparation of test site:
- shaved
- Vehicle:
- unchanged (no vehicle)
- Amount / concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 mL / animal
- Concentration (if solution): undiluted - Duration of treatment / exposure:
- 4 hour
- Observation period:
- 14 days
- Number of animals:
- 3
- Details on study design:
- TEST SITE
- Area of exposure: approx. 10 cm x 10 cm
- % coverage: 100
- Type of wrap if used: surgical gauze patch
REMOVAL OF TEST SUBSTANCE
- Washing (if done): yes
- Time after start of exposure: 4 hours
SCORING SYSTEM: Irritation scoring according to Council Regulation (EC) No 440/2008
Results and discussion
In vivo
Resultsopen allclose all
- Irritation parameter:
- erythema score
- Basis:
- mean
- Remarks:
- all animals
- Time point:
- other: 24h / 48h / 72h/
- Score:
- 1.67
- Max. score:
- 2
- Reversibility:
- fully reversible
- Irritation parameter:
- erythema score
- Basis:
- animal #1
- Remarks:
- mean
- Time point:
- other: 24h / 48h / 72h
- Score:
- 1.33
- Max. score:
- 2
- Reversibility:
- fully reversible
- Irritation parameter:
- erythema score
- Basis:
- animal #2
- Remarks:
- mean
- Time point:
- other: 24h / 48h / 72h
- Score:
- 1.67
- Max. score:
- 2
- Reversibility:
- fully reversible
- Irritation parameter:
- erythema score
- Basis:
- animal #3
- Remarks:
- mean
- Time point:
- other: 24h / 48h / 72h
- Score:
- 2
- Max. score:
- 2
- Reversibility:
- fully reversible
- Irritation parameter:
- edema score
- Basis:
- mean
- Remarks:
- all animals
- Time point:
- other: 24h / 48h / 72h
- Score:
- 1.11
- Max. score:
- 2
- Reversibility:
- fully reversible
- Irritation parameter:
- edema score
- Basis:
- animal #1
- Remarks:
- mean
- Time point:
- other: 24h / 48h / 72h
- Score:
- 1
- Max. score:
- 1
- Reversibility:
- fully reversible
- Irritation parameter:
- edema score
- Basis:
- animal #2
- Remarks:
- mean
- Time point:
- other: 24h / 48h / 72h
- Score:
- 1.33
- Max. score:
- 2
- Reversibility:
- fully reversible
- Irritation parameter:
- edema score
- Basis:
- animal #3
- Remarks:
- mean
- Time point:
- other: 24h / 48h / 72h
- Score:
- 1
- Max. score:
- 1
- Reversibility:
- fully reversible
- Other effects:
- Scaling noted
Any other information on results incl. tables
Table: Skin irritation scores |
||||||
Observation Time |
Erythema |
Oedema |
||||
Animal 1 |
Animal 2 |
Animal 3 |
Animal 1 |
Animal 2 |
Animal 3 |
|
1h |
2 |
2 |
2 |
1 |
2 |
1 |
24h |
2 |
2 |
2 |
1 |
2 |
1 |
48h |
1 |
2 |
2 |
1 |
1 |
1 |
72h |
1 |
1 |
2 |
1 |
1 |
1 |
7 day |
0 |
1 |
0 |
0 |
0 |
0 |
10 day |
0 |
0 |
0 |
0 |
0 |
0 |
14 day |
0 |
0 |
0 |
0 |
0 |
0 |
Mean of 24/48/72h |
1.33 |
1.67 |
2 |
1 |
1.33 |
1 |
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Sodium N-cocoyl glycinate was investigated for its skin irritation property according to the Guideline OECD 404. It is not skin irritating.
- Executive summary:
Sodium N-cocoyl glycinate was investigated for its skin irritation property according to the OECD 404. 0.5 ml of the test material was semi occusively applied to the clipped skin area of rabbits for 4 hours. Three animals were treated. Mild erythema and edema was found in all treated animals and these effects disappeard within 14 days. Sodium N-cocoyl glycinate is not skin irritating.
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