Calcium didocosanoate

Eye irritation

Administrative data

Endpoint:

eye irritation: in vivo

Type of information:

read-across based on grouping of substances (category approach)

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-compliant, guideline study, available as an unpublished proprietary study report.

Justification for type of information:

For read across justification, see Section 13 of IUCLID

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Calcium myristate

EC Number:

239-328-6

EC Name:

Calcium myristate

Cas Number:

15284-51-2

Molecular formula:

C14H27O2.1/2Ca

IUPAC Name:

calcium ditetradecanoate

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

- Physical state: White powder
- Purity: ≥95%
- Substance identity: Calcium myristate synthetic sample
- Batch number: Not reported
- Analysis code: A047/99
- Expiration date: 2013-07-09
- Storage of test material: Room temperature in the dark

Test animals / tissue source

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

- Selection of animals: Immediately prior to test initiation, both eyes of the provisionally selected test rabbits were examined and any animals showing evidence of ocular irritation or defect were rejected
- Age at test initiation: 12 to 20 weeks
- Acclimatisation period: At least 5 days
- Housing: Individually in suspended cages
- Feeding: Free access to mains drinking water and commercial food
- Temperature: 17 to 23°C
- Relative humidity: 30 to 70 %
- Air flow: At least fifteen changes per hour
- Photoperiod: Twelve hours continuous light (06:00 to 18:00) and twelve hours darkness

Test system

Vehicle:

unchanged (no vehicle)

Controls:

no

Amount / concentration applied:

- Volume: 0.1 mL of calcium myristate, equivalent to approximately 34 mg, was applied to the conjunctival sac of the right eye and the upper and lower eyelids were held together for about one second immediately after treatment

Duration of treatment / exposure:

- Duration of exposure: The rabbits' eyes were not washed

Observation period (in vivo):

- Observations of eyes: Assessment of ocular damage/irritation was made approximately 1 hour and 24, 48 and 72 hours following treatment
- Observations of reversibility: An observation was made in one treated eye on Day 7 to assess the reversibility of the ocular effects

Number of animals or in vitro replicates:

- Number of animals: Initially, a single rabbit was treated and after consideration of the ocular response, a second animal was treated

Details on study design:

- Control: The left eye remained untreated and was used for control purposes
- Observations of rabbits: Any other ocular effects and any clinical signs of toxicity were also noted and individual bodyweights were recorded on the day of dosing and at the end of the observation period
- Assessment method: Occular irritation potential results were interpreted according to the Globally Harmonized System of Classification and Labelling of Chemicals

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

cornea opacity score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

0

Results 2

Irritation parameter:

cornea opacity score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

0

Results 3

Irritation parameter:

iris score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0.3

Max. score:

1

Reversibility:

fully reversible

Results 4

Irritation parameter:

iris score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

0

Results 5

Irritation parameter:

conjunctivae score

Basis:

animal #1

Time point:

24/48/72 h

Score:

1

Max. score:

2

Reversibility:

fully reversible

Results 6

Irritation parameter:

conjunctivae score

Basis:

animal #2

Time point:

24/48/72 h

Score:

1.7

Max. score:

2

Reversibility:

fully reversible

Results 7

Irritation parameter:

chemosis score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0.7

Max. score:

2

Reversibility:

fully reversible

Results 8

Irritation parameter:

chemosis score

Basis:

animal #2

Time point:

24/48/72 h

Score:

1

Max. score:

1

Reversibility:

fully reversible

Irritant / corrosive response data:

- Corneal effects: None were noted during the study
- Iridial effects: Inflammation was noted in both treated eyes one hour after treatment and in one treated eye at the 24 Hour observation
- Conjunctival effects: Moderate irritation in both treated eyes at 1 and 24 hours after treatment, with minimal irritation in both treated eyes at 48 hours and in 1 treated eye at 72 hours
- Reversibility: One treated eye appeared normal after 72 hours and the other treated eye appeared normal at 7 days
- Conclusion: Calcium myristate produced a maximum group mean score of 16.0 and was classified as a moderate irritant (Class 5 on a 1 to 8 scale) to the rabbit eye according to a modified Kay and Calandra classification system. Calcium myristate does not meet the criteria for classification according to the Globally Harmonised System of Classification and Labelling of Chemicals or Regulation (EC) No 1272/2008, relating to the Classification, Labelling and Packaging of Dangerous Substances.

Other effects:

- Body weight: Both animals showed expected gain in bodyweight during the study

Any other information on results incl. tables

Individual scores and individual total scores for occular irritation

Rabbit Number and Sex	72630Male				72652Male
	IPR = 0				IPR = 0
Time After Treatment	1 Hour	24 Hours	48 Hours	72 Hours	1 Hour	24 Hours	48 Hours	72 Hours	7 Days
CORNEA
E = Degree of Opacity	0	0	0	0	0	0	0	0	0
F = Area of Cornea Involved	0	0	0	0	0	0	0	0	0
Score (E x F) x 5	0	0	0	0	0	0	0	0	0
IRIS
D	1	1	0	0	1	0	0	0	0
Score (D x 5)	5	5	0	0	5	0	0	0	0
CONJUNCTIVAE
A = Redness	2	2	1	0	2	2	2	1	0
B = Chemosis	2	1	1	0	2	1	1	1	0
C = Discharge	1	1	0	0	2	1	0	0	0
Score (A + B + C) x 2	10	8	4	0	12	8	6	4	0
Total Score	15	13	4	0	17	8	6	4	0

IPR = Initial pain reaction

Individual total scores and group mean scores for occular irritation

Rabbit Number and Sex	Individual Total Scores At:
	1 Hour	24 Hours	48 Hours	72 Hours	7 Days
72630Male	15	13	4	0	-
72652Male	17	8	6	4	0
Group Total	32	21	10	4	0
Group Mean Score	16.0	10.5	5.0	2.0	0.0

- =     Observation not required - considered to be zero for calculation of Group Mean Score

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

Calcium myristate does not meet the criteria for classification according to the Globally Harmonised System of Classification and Labelling of Chemicals or Regulation (EC) No 1272/2008, relating to the Classification, Labelling and Packaging of Dangerous Substances.

Executive summary:

The eye irritation of calcium myristate was assessed in a GLP-compliant, in vivo eye irritation study following OECD guideline 405 (Harlan 2013). A single treatment of calcium myristate was applied to the non-irrigated eye of two rabbits and observations made at 1, 24, 48 and 72 hours and 7 days for effects on conjunctivae, iris and cornea and for reversibility of effects. The study is considered relevant and reliable for use for this endpoint.