Registration Dossier

Toxicological information

Eye irritation

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Administrative data

Endpoint:
eye irritation: in vivo
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Limited data on test substance

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1979
Report Date:
1979

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
other: FDA
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Indigo 60% Grains

Test animals / tissue source

Species:
rabbit
Strain:
New Zealand White

Test system

Vehicle:
unchanged (no vehicle)
Controls:
yes, concurrent no treatment
Amount / concentration applied:
100 mg
Duration of treatment / exposure:
1 hour
Observation period (in vivo):
72 hours
readings at 1, 24, 48, 72 hours after instillation
Number of animals or in vitro replicates:
6
Details on study design:
REMOVAL OF TEST SUBSTANCE
- Washing (if done): no
- Time after start of exposure: -


SCORING SYSTEM:
see Tab. 1 and Tab. 2

Index for Assessment
0-10 non irritating
11-25 slightly irritating
26-56 moderately irritating
57-110 severely irritating

Results and discussion

In vivo

Results
Irritation parameter:
maximum mean total score (MMTS)
Basis:
mean
Time point:
other: 24 to 72 hours
Score:
92
Max. score:
110
Remarks on result:
other: Initial Pain reaction: 4

Applicant's summary and conclusion

Interpretation of results:
highly irritating
Remarks:
Migrated information Criteria used for interpretation of results: US CPSC / US FDA
Conclusions:
Indigo 60% Grains may cause severe eye irritation, accompanied by severe initial pain. As Indigo itself proofed not to be irritating this effect is most likely due to the 5% alkali content.