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Diss Factsheets

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:
2008
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-reference
Reason / purpose for cross-reference:
assessment report
Reference
Endpoint:
skin irritation: in vivo
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
2008
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Justification for read-across is provided in chapter 13 as separate statement
Reason / purpose for cross-reference:
read-across source
Qualifier:
according to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
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

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
Irritation parameter:
erythema score
Basis:
mean
Remarks:
all animals
Time point:
24/48/72 h
Score:
1.67
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
erythema score
Basis:
animal #1
Remarks:
mean
Time point:
24/48/72 h
Score:
1.33
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
erythema score
Basis:
animal #2
Remarks:
mean
Time point:
24/48/72 h
Score:
1.67
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
erythema score
Basis:
animal #3
Remarks:
mean
Time point:
24/48/72 h
Score:
2
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
mean
Remarks:
all animals
Time point:
24/48/72 h
Score:
1.11
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
animal #1
Remarks:
mean
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
animal #2
Remarks:
mean
Time point:
24/48/72 h
Score:
1.33
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
animal #3
Remarks:
mean
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible
Other effects:
Scaling noted

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

Interpretation of results:
GHS criteria not met
Conclusions:
The skin irritation property of the registration substance is assessed based on the read-across to Sodium N-cocoyl glycinate.
Sodium N-cocoyl glycinate was investigated for its skin irritation property according to the Guideline OECD 404. It is not skin irritating.
Likewise the registration substance is not skin irritating.
Executive summary:

 


The skin irritation property of the registration substance is assessed based on the read-across to Sodium N-cocoyl glycinate.


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.


Likewise, the registration substance is not skin irritant. 

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
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

Constituent 1
Reference substance name:
Sodium cocoyl glycinate (SCG) [INCI]
IUPAC Name:
Sodium cocoyl glycinate (SCG) [INCI]

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:
24/48/72 h
Score:
1.67
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
erythema score
Basis:
animal #1
Remarks:
mean
Time point:
24/48/72 h
Score:
1.33
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
erythema score
Basis:
animal #2
Remarks:
mean
Time point:
24/48/72 h
Score:
1.67
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
erythema score
Basis:
animal #3
Remarks:
mean
Time point:
24/48/72 h
Score:
2
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
mean
Remarks:
all animals
Time point:
24/48/72 h
Score:
1.11
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
animal #1
Remarks:
mean
Time point:
24/48/72 h
Score:
1
Max. score:
1
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
animal #2
Remarks:
mean
Time point:
24/48/72 h
Score:
1.33
Max. score:
2
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
animal #3
Remarks:
mean
Time point:
24/48/72 h
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.