Calcium, carbonate hydroxy aluminum complexes

Eye irritation

Administrative data

Endpoint:

eye irritation: in vivo

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

1991-02-11 to 1991-03-04

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1991

Report date:

1991

Materials and methods

Test guideline

Test guideline 1

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Version / remarks:

February 24, 1987

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

EEC Directive 84/449 EEC, EEC Publication No. L251, September 1984

Deviations:

no

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Calcium hydrogen phosphonate

EC Number:

244-182-1

EC Name:

Calcium hydrogen phosphonate

Cas Number:

21056-98-4

IUPAC Name:

calcium phosphonate

Details on test material:

- Name of test material (as cited in study report): RV 777
- Substance type: Reaction mass of dialuminium tricalcium hexaoxide (CAS No. 12042-78-3, EC No. 234-932-6) and calcium hydrogen phosphonate (CAS No. 21056-98-4, EC No. 244-182-1)
- Analytical purity: 90 %
- Physical state: white solid
- Lot/batch No.: CH. 659 B
- Bulk density: 0.62 g/ml
- Expiration date of the lot/batch: December 22, 1995
- Stability in vehicle: stable for at least 48 hours in polyethylene glycol
- Storage condition of test material: at room temperature, dry
- Other: stability under storage conditions: stable for 5 years

Test animals / tissue source

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: Broekman Institute, Someren, The Netherlands
- Selection of animals: Animals for test were selected from stock on the basis of background history. Each animal may have been used on a maximum of 3 previous occasions (in up to 2 skin irritation studies - one test each flank, and possibly 1 eye irritation study). No significant response has been noted on any previous occasion. Only eyes not previously treated were used for the test.
- Rational for selection: To minimise animal usage without compromising sudy integrity.
- Age at study initiation: approximately 20 weeks
- Weight at study initiation: 3106-3377 g
- Housing: Individually in cages with perforated floors equipped with an automatic drinking system (ITL, Bergen, The Netherlands)
- Diet: Standard laboratory rabbit diet (LKK-20, pellet diameter 4mm, Hope Farms, Woerden, The Netherlands) approximately 100 g per day
- Water: tap-water diluted with decalcified water ad libitum
- Acclimation period: At least five days before start of treatment under test conditions.


ENVIRONMENTAL CONDITIONS
- Temperature: 21°C
- Humidity: 55%
- Air changes (per hr): 15
- Photoperiod: Lighting was 12 hours artificial fluorescent light and 12 hours dark per day.

Test system

Vehicle:

unchanged (no vehicle)

Controls:

other: The other eye of each animal remained untreated and served as the reference control

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 62 +/- 2 mg (equivalent to 0.1 ml) per animal

VEHICLE
- no vehicle used

Duration of treatment / exposure:

24 hours

Observation period (in vivo):

21 days

Number of animals or in vitro replicates:

3

Details on study design:

TEST SUBSTANCE PREPARATION: The powdery test substance was instilled as delivered by the sponsor.

TREATMENT: On day 1, prior to test substance administration, the animals were physically examined and the eyes were found to be normal.

The test substance (approximately 62 mg (0.1 ml) per animal) was instilled in the conjunctival sac of one eye of each animal after gently pulling the lower lid away from the eyeball. The lids were then gently held together for about one second to prevent loss of the test substance. The other eye remained untreated and served as the reference control.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): Immediately after fluorescein examination on day 2, both eyes of all three animals were rinsed with approximately 50 ml tepid tap-water per eye, using a velocity of flow which did not affect the eyes, to remove residual test substance. However, not all test substance could be rinsed out because of adherence of test substance to the conjunctivae.
- Time after start of exposure: 24 hours

SCORING SYSTEM: The test results were evaluated according to the EEC general classification and labelling requirements for dangerous substances (Annex VI of the EEC Council Directive 67/548/EEC as amended by Directive 83/467/EEC, Sep. 1983). Draize scores were calculated.

TOOL USED TO ASSESS SCORE:
- Immediately after the 24 hour observation, a solution of 2% flourescein in water (adjusted to pH 7.0) was instilled into both eyes of each animal to quantitatively determine corneal epithelial damage. This procedure was repeated in all three animals an days 4 and 8. Any bright green stained area, indicating epithelial damage, was estimated as a percentage of the total corneal area.
- In case standard lighting was considered inadequate for observing minor effects, eye examinations were performed using a pocket flash light.
- In case of equivocal results when comparing the treated and untreated eyes, the illustrated guide from the Consumer Product Safety Commission, Washington, DC 20207 was used for additional control purposes.

OBSERVATIONS:
- Viability/Mortality: Daily, animals were also examined for signs of toxicity.
- Body weight: Day 1 of test (application day).
- Symptoms: The eyes of each animal were examined approximately 1, 24, 48 and 72 hours and 7, 14 and 21 days after instillation of the test substance.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

cornea opacity score

Basis:

animal: #1

Time point:

other: mean 24, 48 and 72 hours

Score:

0.66

Max. score:

4

Reversibility:

fully reversible within: 7 days

Remarks on result:

other: area of cornea affected : max. score 2

Results 2

Irritation parameter:

cornea opacity score

Basis:

animal: #2, #3

Time point:

other: mean 24, 48 and 72 hours

Score:

0

Max. score:

4

Reversibility:

fully reversible within: 7 days

Remarks on result:

other: animals showed very slight coneal ocacity at an intensity less than score 1; area of cornea affected: max. score 2 in animals #2, and max. score 3 in animal #3

Results 3

Irritation parameter:

iris score

Basis:

animal: #1, #2, #3

Time point:

other: mean 24, 48 and 72 hours

Score:

1

Max. score:

2

Reversibility:

fully reversible within: 72 hours

Results 4

Irritation parameter:

conjunctivae score

Basis:

animal: #1, #2, #3

Time point:

other: mean 24, 48 and 72 hours

Score:

3

Max. score:

3

Reversibility:

fully reversible within: 21 days

Results 5

Irritation parameter:

chemosis score

Basis:

animal: #1, #2, #3

Time point:

other: mean 24, 48, 72 hours

Score:

2.33

Max. score:

3

Reversibility:

fully reversible within: 14 (animal #1), 7 (animal #2) or 21 (animal #3) days

Irritant / corrosive response data:

Under the conditions of this study, the test substance RV 777 resulted in adverse effects on the cornea, iris and the conjunctivae in all three animals.
The opacity of the cornea was reversible within 7 days after exposure, the injection of the iris was reversible within 72 hours and the irritation of the conjunctivae was reversible within 21 days in all three animals.
No ocular corrosion was observed of all three animals.

No signs of systemic intoxication were observed during the study period.

Any other information on results incl. tables

Table 1: Irritant/corrosive response data for each animal at each observation time up to removal of each animal from the test

Score at time point / Reversibility	Cornea opacity	Area of cornea affected	Iris	Conjunctivae	Chemosis	Discharge
	Max. score: 4	Max. score: 4	Max. score: 2	Max. score: 3	Max. score: 4	Max. score: 3
60 min	0^1)/0^1)/0^1)	1/1/1	1/1/1	1/1/1	3/2/3	0/0/0
24 h	0^1)/0^1)/0^1)	2/2/3	1/1/1	3/3/3	2/2/2	2/2/2
48 h	1/0^1)/0^1)	1/2/2	1/1/1	3/3/3	2/2/2	3/3/3
72 h	1/0^1)/0^1)	2/1/1	0/0/0	3/3/3	1/1/1	2/1/2
7 d	0/0/0	0/0/0	0/0/0	2/3/2	0/0/0	1/0/1
14 d	0/0/0	0/0/0	0/0/0	1/1/1	1/0/1	0/0/1
21 d	0/0/0	0/0/0	0/0/0	0/0/0	0/0/0	0/0/0
Average 24h, 48h, 72h	0.66/0^1)/0^1)	1.67/1.67/2	0.67/0.67/0.67	3/3/3	2.33/2.33/2.33	2.33/2/2.33
Reversibility*)	c/c/c	c/c/c	c/c/c	c/c/c	c/c/c	c/c/c
Average time (d) for reversion	7/7/7	7/7/7	3/3/3	21/21/21	21/7/21	14/7/21

1) Very slight corneal opacity

 *) Reversibility: c. = completely reversible; n.c. = not completely reversible; n. = not reversible

The test substance was considered moderately irritating to the rabbit eye by a Kay and Calandra interpretation (J. Society of Cosmetic Chemists, Vol. B no.6, 1962) of the calculated maximum Draize score of 22.7 (maximum possible score 110).

Applicant's summary and conclusion

Interpretation of results:

other: Irritating to eyes (Category 2)

Remarks:

Criteria used for interpretation of results: other: Regulation (EC) No 1272/2008

Conclusions:

According to the EEC criteria for classification and labelling requirements for dangerous substances (EEC Council Directive 67/548/EEC), the test substance should be labelled as an eye irritant (R36) and according Regulation (EC) No 1272/2008 on classification, labelling and packaging (CLP) of substances and mixtures (EU GHS), the test substance should be labelled as Irritating to eyes (Category 2)

Executive summary:

In a primary eye irritation study according to OECD Guideline No. 405, February 24, 1987 and EEC Directive 84/449/EEC, Part B.5, September 1984, 62 mg (0.1 ml) of RV 777 (90 % a.i.) was instilled into the conjunctival sac of one eye of 3 young adult New Zealand white rabbits for 24 hours. Animals were observed for 21 days. Irritation was scored by the numerical scoring system according to Draize as given in the guidelines.

Under the conditions of this study, RV 777 resulted in adverse effects on the cornea, iris and the conjunctivae in all three animals.

The opacity of the cornea was reversible within 7 days after exposure, the injection of the iris was reversible within 72 hours and the irritation of the conjunctivae was reversible within 21 days in all three animals. No ocular corrosion was observed of all three animals.

In this study, RV 777 is an eye irritant.