Edetic acid

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1973

Report date:

1973

Materials and methods

Principles of method if other than guideline:

BASF-TEST: Before OECD guideline 404 was established, skin irritation was tested using an internal method. White Vienna rabbits were used. Usually, 2 animals were treated for 1, 5 and 15 minutes and 2 other animals for 20 h using occlusive conditions. An application site of 2.5 x 2.5 cm was covered with the liquid or powdered and moistened test substance. These results from the ear, however, would not be taken into account for evaluation as they do not represent testing of the dorsal/lateral flank of the back. After the application time, the skin was washed with water which sometimes contained a mild detergent. The animals were observed 8 days and skin changes were recorded on working days.

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Edetic acid

EC Number:

200-449-4

EC Name:

Edetic acid

Cas Number:

60-00-4

Molecular formula:

C10 H16 N2 O8

IUPAC Name:

2,2',2'',2'''-(ethane-1,2-diyldinitrilo)tetraacetic acid

Test material form:

solid

Specific details on test material used for the study:

OTHER SPECIFICS:
- Name of test material (as cited in study report): Trilon BS

Test animals

Species:

rabbit

Strain:

Vienna White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Weight at study initiation: 3.05; 3.31 kg

Test system

Type of coverage:

occlusive

Preparation of test site:

other: clipped

Vehicle:

water

Controls:

no

Amount / concentration applied:

TEST MATERIAL
- Amount applied: 2 mL
- Concentration (if solution): 50%

Duration of treatment / exposure:

20 h (2 additional animals for 1-15 min incubation)

Observation period:

8 days

Number of animals:

2

Details on study design:

TEST SITE
- Area of exposure: 2.5 x 2.5 cm

REMOVAL OF TEST SUBSTANCE
- Washing: once with 100% Lutrol and additionally with 50% Lutrol in water
- Time after start of exposure: 1, 5 or 15 minutes, the areas exposed for 20 h were not washed

READING TIME POINTS
24 h, 48 h, 72 h, 96 h, 7 d, 8 d after application

READING TIME POINTS USED FOR ASSESSMENT
24, 48 and 72 h.

SCORING SYSTEM:
- For the evaluation the BASF scores given in the raw data were converted to Draize scores.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Results 2

Irritation parameter:

edema score

Basis:

mean

Time point:

24/48/72 h

Score:

0

Max. score:

4

Irritant / corrosive response data:

- Additionally no irritation/ corrosive effects were observed in animals treated for up to 15 min

Other effects:

- Slight erythema (Draize Score 2) could be observed at the ear of both animals. The effects were fully reversible within 48 h.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met