Sodium 3-morpholin-4-ylpropane-1-sulfonate

Endpoint summary

Description of key information

The test item showed no skin irritation potential in an in vivo study under semi-occlusive conditions in rabbits (reference 7.3.1-1).

The test item showed no eye irritation potential in an in vivo study in rabbits (reference 7.3.2-1).

Key value for chemical safety assessment

Skin irritation / corrosion

Link to relevant study records

Reference

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1997-08-14 to 1997-08-17

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

Commission Directive 92/69/EEC

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Version / remarks:

adopted 17 July 1992

Deviations:

no

GLP compliance:

yes

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: David Percival Ltd, Moston, Sandbach, Cheshire, UK
- Age at study initiation: 12-16 weeks
- Weight at study initiation: 2.49-2.61 kg
- Housing: individually, suspended metal cages
- Diet: ad libitum, STANRAB SQC Rabbit Diet, Special Diets Services Ltd, Witham, Essex, UK
- Water: ad libitum
- Acclimation period: min. 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18-22
- Humidity (%): 74
- Air changes (per hr): approx. 15
- Photoperiod (hrs dark / hrs light): 12/12

Type of coverage:

semiocclusive

Preparation of test site:

clipped

Remarks:

day before treatment

Vehicle:

water

Controls:

no

Amount / concentration applied:

TEST MATERIAL
- Amount applied: 0.5 g

VEHICLE
- Amount applied: 0.5 mL
- used to moisture test material on test site, not mixed before application

Duration of treatment / exposure:

4 h

Observation period:

72 h

Number of animals:

3

Details on study design:

TEST SITE
- Area of exposure: 2.5 cm x 2.5 cm on back of animal
- Type of wrap: The cotton gauze patch was secured in position with a strip of surgical adhesive tape (BLENDERM: approximate size 2.5 cm x 4.0 cm). To prevent the animals interfering with the patches, the trunk of each rabbit was wrapped in an elasticated corset (TUBIGRIP).

REMOVAL OF TEST SUBSTANCE
- Washing: gentle swabbing with cotton wool soaked in distilled water
- Time after start of exposure: 4 h

OBSERVATION TIME POINTS
1, 24, 48 and 72 h after removal of patch

SCORING SYSTEM:
Effects were scored according to the scale from Draize J H, (1977) "Dermal and Eye Toxicity Tests" In: Principles and Procedures for Evaluating the Toxicity of Household Substances, National Academy of Sciences, Washington DC p.31.

Irritation parameter:

erythema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

fully reversible within: 24 h

Irritation parameter:

edema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

erythema score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

erythema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

fully reversible within: 24 h

Irritation parameter:

erythema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

fully reversible within: 24 h

Irritation parameter:

edema score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

edema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

edema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritant / corrosive response data:

Very slight erythema was noted at two treated skin sites at the 1-hour observation. No other evidence of skin irritation was noted during the study.

Other effects:

No other effects were observed.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item showed no skin irritation potential in an in vivo study under semi-occlusive conditions in rabbits.

Executive summary:

A study was performed to assess the irritancy potential of the test material to the skin of the New Zealand White rabbit. The method used followed the recommendations of the OECD Guidelines for Testing of Chemicals No. 404 "Acute Dermal Irritation/Corrosion" (adopted 17 July 1992) and Method B4 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC). A single 4-hour, semi-occluded application of the test material to the intact skin of three rabbits was done. Very slight erythema was noted at two treated skin sites at the 1-hour observation. No other evidence of skin irritation was observed during the study. The test material produced a primary irritation index of 0.0 and was classified as non-irritant to rabbit skin according to the Draize Classification scheme. No corrosive effects were noted.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not irritating)

Eye irritation

Link to relevant study records

Reference

Endpoint:

eye irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1997-08-19 to 1997-08-24

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion)

Version / remarks:

Commission Directive 92/69/EEC

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Version / remarks:

adopted 24 February 1987

Deviations:

no

GLP compliance:

yes

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: David Percival Ltd, Moston, Sandbach, Cheshire, UK
- Age at study initiation: 12-16 weeks
- Weight at study initiation: 2.85-3.07 kg
- Housing: individually housed in suspended metal cages
- Diet: ad libitum, STANRAB SQC Rabbit Diet, Special Diets Services Ltd, Witham, Essex, UK
- Water: ad libitum
- Acclimation period: min. 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19-23
- Humidity (%): 74-78
- Air changes (per hr): approx. 15
- Photoperiod (hrs dark / hrs light): 12/12

Vehicle:

unchanged (no vehicle)

Controls:

yes, concurrent no treatment

Amount / concentration applied:

TEST MATERIAL
- Amount applied: 0.1 mL (approx. 81 mg)

Duration of treatment / exposure:

application without removal by washing

Observation period (in vivo):

72 h

Number of animals or in vitro replicates:

3

Details on study design:

REMOVAL OF TEST SUBSTANCE
Test item was not removed.

SCORING SYSTEM:
Draize J H (1977) "Dermal and Eye Toxicity Tests" In: Principles and Procedures for Evaluating the Toxicity of Household Substances, National Academy of Sciences, Washington DC p.48 to 49

TOOL USED TO ASSESS SCORE: ophthalmoscope

Irritation parameter:

conjunctivae score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0.7

Max. score:

3

Reversibility:

fully reversible within: 72 h

Irritation parameter:

conjunctivae score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0.7

Max. score:

3

Reversibility:

fully reversible within: 72 h

Irritation parameter:

conjunctivae score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0.7

Max. score:

3

Reversibility:

fully reversible within: 72 h

Irritation parameter:

chemosis score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0.3

Max. score:

4

Reversibility:

fully reversible within: 48 h

Irritation parameter:

chemosis score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0.3

Max. score:

4

Reversibility:

fully reversible within: 48 h

Irritation parameter:

chemosis score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0.3

Max. score:

4

Reversibility:

fully reversible within: 48 h

Irritation parameter:

cornea opacity score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

iris score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

2

Irritation parameter:

cornea opacity score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

cornea opacity score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

iris score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

2

Irritation parameter:

iris score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0

Max. score:

2

Irritation parameter:

overall irritation score

Basis:

mean

Time point:

24/48/72 h

Score:

2.2

Max. score:

110

Reversibility:

fully reversible within: 72 h

Irritation parameter:

cornea opacity score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritation parameter:

iris score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

2

Irritation parameter:

conjunctivae score

Basis:

mean

Time point:

24/48/72 h

Score:

0.7

Max. score:

3

Reversibility:

fully reversible within: 72 h

Irritation parameter:

chemosis score

Basis:

mean

Time point:

24/48/72 h

Score:

0.3

Max. score:

4

Reversibility:

fully reversible within: 48 h

Other effects:

Moderate conjunctival irritation was noted in all treated eyes at 1 hour. Minimal conjunctival irritation was observed in all treated eyes after 24 and 48h. No other evidence of eye irritation was noted.
No further effects were detected.

Interpretation of results:

GHS criteria not met

Conclusions:

The test item showed no eye irritation potential in an in vivo study in rabbits.

Executive summary:

A study was performed to assess the irritancy potential of the test material following a single application to eye of the New Zealand White rabbit. The method used followed the recommendations of the OECD Guidelines for Testing of Chemicals No. 405 "Acute Eye Irritation/Corrosion" (adopted 24 February 1987) and Method B5 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC). A test material amount of 0.1 mL was introduced to each eye and no washing procedure was performed. Moderate conjunctival irritation was noted in all treated eyes at the 1-hour observation. Minimal conjunctival irritation was noted in all treated eyes at the 24 and 48-hour observations. No other evidence of eye irritation was noted. All observed effects were reversible within 72 h after application. The mean scores for 24/48/72 h for conjunctivae, chemosis, cornea opacity and iris were 0.7 (fully reversible within 72 h), 0.3 (fully reversible within 48 h), 0 and 0, respectively. No further effects were detected. The test material is therefore considered to be non-irritant to rabbit eyes.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information

Skin irritation

A study was performed to assess the irritancy potential of the test material to the skin of the New Zealand White rabbit. The method used followed the recommendations of the OECD Guidelines for Testing of Chemicals No. 404 "Acute Dermal Irritation/Corrosion" (adopted 17 July 1992) and Method B4 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC). A single 4-hour, semi-occluded application of the test material to the intact skin of three rabbits was done. Very slight erythema was noted at two treated skin sites at the 1-hour observation. No other evidence of skin irritation was observed during the study. The test material produced a primary irritation index of 0.0 and was classified as non-irritant to rabbit skin according to the Draize Classification scheme. No corrosive effects were noted.

Eye irritation

A study was performed to assess the irritancy potential of the test material following a single application to eye of the New Zealand White rabbit. The method used followed the recommendations of the OECD Guidelines for Testing of Chemicals No. 405 "Acute Eye Irritation/Corrosion" (adopted 24 February 1987) and Method B5 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC). A test material amount of 0.1 mL was introduced to each eye and no washing procedure was performed. Moderate conjunctival irritation was noted in all treated eyes at the 1-hour observation. Minimal conjunctival irritation was noted in all treated eyes at the 24 and 48-hour observations. No other evidence of eye irritation was noted. All observed effects were reversible within 72 h after application. The mean scores for 24/48/72 h for conjunctivae, chemosis, cornea opacity and iris were 0.7 (fully reversible within 72 h), 0.3 (fully reversible within 48 h), 0 and 0, respectively. No further effects were detected. The test material is therefore considered to be non-irritant to rabbit eyes.

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No 1272/2008

The available experimental test data are reliable and suitable for classification purposes under Regulation (EC) No 1272/2008. Based on available data on skin and eye irritation, the test item does not require classification for causing skin or eye irritation according to Regulation (EC) No 1272/2008 (CLP), as amended for the fifteenth time in Regulation (EU) No 2020/1182.