Registration Dossier

Administrative data

Description of key information

Skin irritation (rat): not irritating [Draft report, Lewin 2001b]
Eye irritation (rabbit): not irritating [Draft report, Lewin 2002]

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:
other information
Study period:
Oct 2000
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Comparable to guideline study with acceptable restrictions: A combined study on acute dermal toxicity and on local tolerance was used to assess skin irritation/corrosion. The study design and reporting deviates from the current OECD TG 404, however, the study is considered sufficient for assessment of this endpoint.
Reason / purpose:
reference to same study
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Deviations:
yes
Remarks:
- exposure time 24 hrs instead of 4 hrs, 6 animals instead of 3, few details in test description and reporting
Species:
rat
Strain:
Wistar
Type of coverage:
occlusive
Preparation of test site:
not specified
Vehicle:
other: paraffin oil
Controls:
other: the untreated skin served as control
Amount / concentration applied:
530-580 mg/male animal or 380-394 mg/female animal
Duration of treatment / exposure:
24 hours
Observation period:
14 days
Number of animals:
3 males and 3 females

The mean values of findings relevant for classification (reddening, scab formation and swelling of the skin) at the time-points 24, 48 and 72 hours after the end of administration were 0.

Executive summary:

A single dermal administration of the test substance for 24 hours to male and female rats at a dose of 2000 mg/kg (530-580 mg/male and 380-394 mg/female applied as a paste) was tolerated without any local irritations. The mean values of findings relevant for classification (reddening, scab formation and swelling of the skin) at the time-points 24, 48 and 72 hours after the end of administration were 0.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Eye irritation

Link to relevant study records
Reference
Endpoint:
eye irritation: in vivo
Type of information:
experimental study
Adequacy of study:
other information
Study period:
Nov to Dec 2000
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: guideline study
Qualifier:
according to
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
Deviations:
yes
Remarks:
- 4 instead of 3 animals
Species:
rabbit
Strain:
New Zealand White
Vehicle:
unchanged (no vehicle)
Controls:
other: the left eye, which remained untreated, served as control.
Amount / concentration applied:
0.1 mL
Duration of treatment / exposure:
test substance remained in the eye (eye was not rinsed)
Observation period (in vivo):
4 days
Number of animals or in vitro replicates:
2 males and 2 females
Irritation parameter:
cornea opacity score
Basis:
mean
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4
Irritation parameter:
iris score
Basis:
mean
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
2
Irritation parameter:
conjunctivae score
Remarks:
reddening
Basis:
mean
Time point:
other: 24, 48, 72 h
Score:
0.67
Max. score:
3
Reversibility:
fully reversible within: 3 days
Irritation parameter:
conjunctivae score
Remarks:
swelling
Basis:
mean
Time point:
other: 24, 48, 72 h
Score:
0
Max. score:
4

Table 1: Results of the study

    

 Irritant effects (score)         

Animal no. (sex)

 Irritation parameter

24 h 48 h  72 h  Mean scores

 1 (M)

 Cornea

0 0.0
 

 Iris

0 0 0 0.0
 

 Conjunctiva (reddening)

1 1 0 0.67
 

 Conjunctiva (swelling)

0 0 0 0.0

 2 (M)

 Cornea

0 0 0 0.0
   Iris 0 0 0 0.0
   Conjunctiva (reddening) 1 1 0 0.67
   Conjunctiva (swelling) 0 0 0 0.0

 3 (F)

 Cornea 0 0 0 0.0
   Iris 0 0 0 0.0
   Conjunctiva (reddening) 0 0 0 0.0
   Conjunctiva (swelling) 0 0 0 0.0

 4 (F)

 Cornea 0 0 0 0.0
   Iris 0 0 0 0.0
   Conjunctiva (reddening) 2 2 0 1.33
   Conjunctiva (swelling) 0 0 0 0.0

The control eyes were without findings.

The single administration of 0.1 mL test substance (56.1-72.2 mg ZK 30367) into the conjunctival sac of the right eye led to slight to moderate reddening of the conjunctivae in all animals on administration day and on day 2 and 3. Slight swelling of the conjunctivae in one animal of each gender was observed on administration day. All animals were without findings 72 hours after treatment.

Executive summary:

In a local tolerance test on the rabbit eye according to OECD TG 405 a single application of the test substance into the conjunctival sac provoked slight irritation which was fully reversible 72 hours after treatment. The mean values of findings relevant for classification at the time-points 24, 48 and 72 hours after application were 0 for the parameters cornea, iris and conjunctival swelling as well as 0.67 for conjunctival reddening. According to EU classification criteria ZK 30367 need not be labelled as an eye irritant.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion
Endpoint conclusion:
no study available

Additional information

A combined study on acute dermal toxicity and on local tolerance was conducted (Lewin, 2001b). The study design and reporting deviates from the current OECD TG 404, however, the study was considered sufficient for assessment of skin irritation/corrosion. In this study a single dermal administration of the test substance for 24 hours to male and female rats at a dose of 2000 mg/kg (530-580 mg/male and 380-394 mg/female

applied as a paste) was tolerated without any local irritations.

In a local tolerance test on the rabbit eye according to OECD TG 405 a single application of the test substance into the conjunctival sac provoked slight irritation which was fully reversible 72 hours after treatment (Lewin, 2002). The mean values of findings relevant for classification at the time-points 24, 48 and 72 hours after application were 0 for the parameters cornea, iris and conjunctival swelling as well as 0.67 for conjunctival reddening. According to EU classification criteria ZK 30367 need not be labelled as an eye irritant.


Justification for selection of skin irritation / corrosion endpoint:
Only one study available

Justification for selection of eye irritation endpoint:
Only one study available

Justification for classification or non-classification

Based on the study results a classification according to Directive 67/548/EEC or Regulation (EC) No. 1272/2008 (CLP) is not required.