Tris(2-hydroxyethyl)ammonium salts of tall-oil fatty acids

Endpoint summary

Description of key information

In the in vivo skin irritation test reversible effects were observed. In the in vivo eye irritation test in rabbits irritation was observed which was fully reversible within 3 weeks.

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

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method B.4 (Acute Toxicity: 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

- Number and Sex: 3 males
- Animal supplier: S&K-LAP Kft., 2173 Kartal, Császár út 135, Hungary
- Age on day of dosing (Day 0): Ca. 12 weeks old (young adult)
- Weight prior to dosing (Day 0): Minimum 3051 g, maximum 3131 g
- Housing: Individual housing in AAALAC approved metal wire rabbit cages allowing for some
social interaction with rabbit(s) in adjacent cages
- Diet (ad libitum): Commercially available rabbit diet, AGRIBRANDS Europe Hungary PLC, H-5300 Karcag, Hungary
- Water (ad libitum): Tap water from municipal supply
- Acclimation period: 14 days prior to study start under laboratory conditions.

Water was regularly analysed for contaminants, detailed information on the diet was provided by the supplier. Water and diet used in the present study were not considered to adversely affect the purpose or integrity of the study.

ENVIRONMENTAL CONDITIONS

Controlled environment, environmental conditions were:
- Ventilation, air changes per hour: 15-20
- Temperature (°C): 20 +/- 3°C
- Relative Humidity (%): 30 to 65%
- Photoperiod (artificial lighting): 12 hrs day / 12 hrs night
Relative humidity and temperature at times slightly exceeding the upper target limits of 70% and 23°C, respectively were not considered to have compromised the integrity or validity of the study.

Type of coverage:

semiocclusive

Preparation of test site:

clipped

Vehicle:

unchanged (no vehicle)

Controls:

no

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied: 0,5 g
- Concentration (if solution): neat test material

Duration of treatment / exposure:

4 hours

Observation period:

72 hours

Number of animals:

3 animals

Details on study design:

TEST SITE
- Area of exposure: dorsal thoracal region, approx. 6 cm2
- Type of wrap if used: sterile gauze pads

SCORING SYSTEM:
Erythema I Eschar formation
0 No erythema.
1 Very slight erythema (barely perceptible).
2 Well-defined erythema.
3 Moderate to severe erythema.
4 Severe erythema (beet redness) to slight eschar formation (injuries in depth).

Oedema formation
0 No oedema.
1 Very slight oedema (barely perceptible).
2 Slight oedema (edges of area well defined by definite raising).
3 Moderate oedema (raised approximately 1 mm).
4 Severe oedema (raised more than 1 mm and extending beyond area of exposure).

Irritation parameter:

erythema score

Basis:

animal #1

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 2 weeks

Irritation parameter:

erythema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 3 weeks

Irritation parameter:

erythema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 3 weeks

Irritation parameter:

edema score

Basis:

animal #1

Time point:

24 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 48 h

Irritation parameter:

edema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 1 week

Irritation parameter:

edema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 1 week

No symptoms of systemic toxicity were observed in the animals during the test period and no mortalitiy occured.

All areas to be treated with the test substance and all control areas were normal before the application.The control areas were normal at any observation time.

Interpretation of results:

other: Category 2 (irritant) according to Regulation 1272/2008

Conclusions:

. 

Endpoint conclusion

Endpoint conclusion:

adverse effect observed (irritating)

Eye irritation

Link to relevant study records

Reference

Endpoint:

eye irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Version / remarks:

of 2002

Deviations:

no

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.2400 (Acute Eye Irritation)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS

- Number and Sex: 3 males
- Animal supplier: S&K-LAP Kft., 2173 Kartal, Császár út 135, Hungary
- Age on day of dosing (Day 0): Ca. 11 weeks old (young adult)
- Weight prior to dosing (Day 0): Minimum 2690 g, maximum 2948 g
- Housing: Individual housing in AAALAC approved metal wire rabbit cages allowing for some
social interaction with rabbit(s) in adjacent cages
- Diet (ad libitum): Commercially available rabbit diet, AGRIBRANDS Europe Hungary PLC, H-5300 Karcag, Hungary
- Water (ad libitum): Tap water from municipal supply
- Acclimation period: 7 days prior to study start under laboratory conditions.

Water was regularly analysed for contaminants, detailed information on the diet was provided by the supplier. Water and diet used in the present study were not considered to adversely affect the purpose or integrity of the study.

ENVIRONMENTAL CONDITIONS

Controlled environment, environmental conditions were:
- Ventilation, air changes per hour: 15-20
- Temperature (°C): 19.7 to 27.1°C
- Relative Humidity (%): 32 to 83%
- Photoperiod (artificial lighting): 12 hrs day / 12 hrs night
Relative humidity and temperature at times slightly exceeding the upper target limits of 70% and 23°C, respectively were not considered to have compromised the integrity or validity of the study.

Vehicle:

unchanged (no vehicle)

Controls:

not required

Amount / concentration applied:

0.1 mL of the undiluted wax-like test material was administered into the conjunctival sac of one eye per rabbit (left eye). The contralateral eye (right eye) remained untreated to serve as a control.

Duration of treatment / exposure:

Residual test material was seen in the treated eyes. Therefore, the eyes were rinsed with physiological saline at 1 hour after test material instillation.

Observation period (in vivo):

21 days

Number of animals or in vitro replicates:

3 adult male rabbits

Details on study design:

EYE EVALUATION:

Within 2.5 hours before treatment start both eyes of each animal were investigated to ensure that there were no pre-existing corneal damage, eye irritation or ocular defects.

One animal was initially treated and, in the absence of a severe effect at 1 hour post instillation, the remaining two animals were committed to the study.

Eyes were evaluated in all animals at approximately 1, 24, 48 & 72 hours and 7, 14 & 21 days after test material instillation adopting the numerical scoring system listed in Table 1 in the field below. Grades attained at 24, 48 and 72 hours after instillation were included in the mean gradings of ocular lesions and used for evaluation of the necessity of eye irritation/corrosion classification.

Equipment used for eye evaluation: Ophthalmoscope or pencil beam torch

Irritation parameter:

cornea opacity score

Basis:

animal #1

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 7 days

Irritation parameter:

cornea opacity score

Basis:

animal #2

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 7 days

Irritation parameter:

cornea opacity score

Basis:

animal #3

Time point:

24/48/72 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 7 days

Irritation parameter:

other: corneal area affected

Basis:

mean

Time point:

24/48/72 h

Score:

2.8

Max. score:

4

Reversibility:

fully reversible within: 7 days

Irritation parameter:

iris score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

2

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:

conjunctivae score

Remarks:

redness

Basis:

animal #1

Time point:

24/48/72 h

Score:

1.3

Max. score:

3

Reversibility:

fully reversible within: 14 days

Irritation parameter:

conjunctivae score

Remarks:

redness

Basis:

animal #2

Time point:

24/48/72 h

Score:

2

Max. score:

3

Reversibility:

fully reversible within: 21 days

Irritation parameter:

conjunctivae score

Remarks:

redness

Basis:

animal #3

Time point:

24/48/72 h

Score:

2

Max. score:

3

Reversibility:

fully reversible within: 21 days

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:

2

Max. score:

4

Reversibility:

fully reversible within: 7 days

Irritation parameter:

chemosis score

Basis:

animal #3

Time point:

24/48/72 h

Score:

1.7

Max. score:

4

Reversibility:

fully reversible within: 7 days

Irritation parameter:

other: Discharge

Basis:

animal #1

Time point:

24/48/72 h

Score:

0.7

Max. score:

3

Reversibility:

fully reversible within: 72 h

Irritation parameter:

other: Discharge

Basis:

animal #2

Time point:

24/48/72 h

Score:

3

Max. score:

3

Reversibility:

fully reversible within: 7 days

Irritation parameter:

other: Discharge

Basis:

animal #3

Time point:

24/48/72 h

Score:

2

Max. score:

3

Reversibility:

fully reversible within: 7 days

Irritant / corrosive response data:

Iridic lesions were not evident throughout the study. Corneal lesions (opacity grade 1, except for grade 2 in one animal at 1 h after test material instillation) were seen in all animals until 72 hours after test material instillation and had entirely disappeared in all animals by 7 days after instillation. In each animal, the area of cornea affected was scored grade 4 to 0. Conjunctival redness grade 2, chemosis grade 3 and discharge grade 3, were seen in all animals at 1 h after instillation, therafter gradually decreasing in severity and incidence. By 7 days after instillation chemosis and discharge had fully disappeared in all animals and by 21 days after instillation conjunctival redness had fully disappeared. Control eyes were without ocular findings throughout the observation period.

Other effects:

Observation of the animals for defined behavioural criteria led to the conclusion that instillation of the test material induced slight initial pain (grade 2). Any other signs of systemic toxicity or ill health were not evident and bodyweight was unaffected by treatment with the test material.

Interpretation of results:

other: irritating

Conclusions:

The substance is irritating to eyes. All findings noted were fully reversible.

Endpoint conclusion

Endpoint conclusion:

adverse effect observed (irritating)

Respiratory irritation

Endpoint conclusion

Endpoint conclusion:

no study available

Justification for classification or non-classification

The reversible skin irritation observed in the in vivo skin irritation study necessitates classification of WS400102 as "category 2 irritant" [REGULATION (EC) 1272/2008].

The reversible effects observed in the in vivo eye irritation study necessitate classification of WS400102 as “Category 2 (reversible effects on the eye)" [REGULATION (EC) 1272/2008].