Pitch, coal tar, high-temp.

Endpoint summary

Description of key information

No particular irritation to skin and eye was noted in experimental standard studies. 
In the presence of UV-light (UVA), photo-induced human skin irritation was observed under working (bright sunlight) and experimental (artificial UV irradiation) conditions.

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:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: Directive 83/467/EEC

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

GLP compliance:

yes

Specific details on test material used for the study:

Electrode binder [CAS No. 65996-93-2]
- Name of test material (as cited in study report): 101.110
- Physical state: solid, black powder

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Harald Schriever, Kaninchenfarm, Bremerförde/Germany
- Age at study initiation: no data
- Weight at study initiation: 2.4 - 2.8 kg
- Housing: cage, single
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: >= 7 d


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18 +-2 °C
- Humidity (%): 50 - 86 %
- Air changes (per hr): no data
- Photoperiod (hrs dark / hrs light): 12 / 12

Type of coverage:

occlusive

Preparation of test site:

shaved

Vehicle:

unchanged (no vehicle)

Controls:

not required

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 g

Duration of treatment / exposure:

4 hour(s)

Observation period:

readings: 1 h, 24, 48, and 72 h after removal of the cover

Number of animals:

6

Details on study design:

TEST SITE
- Area of exposure: 2.5 x 2.5 cm
- skin intact and scarified

REMOVAL OF TEST SUBSTANCE
- Washing (if done): lukewarm water
- Time after start of exposure: 4 h

SCORING SYSTEM: according to Draize

Irritation parameter:

erythema score

Basis:

animal: 1 to 6

Time point:

other: 1, 24, 48, and 72 h

Score:

0

Max. score:

4

Reversibility:

fully reversible

Remarks on result:

no indication of irritation

Remarks:

both on the intact and scarified skin

Irritation parameter:

edema score

Basis:

animal: 1 to 6

Time point:

other: 1, 24, 48, and 72 h

Score:

0

Max. score:

4

Reversibility:

fully reversible

Remarks on result:

no indication of irritation

Remarks:

both on the intact and scarified skin

Irritant / corrosive response data:

There was no skin reaction over the observation time of 72 h (score 0 for all parameters).

Interpretation of results:

GHS criteria not met

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:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: Directive 83/467/EEC.

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

GLP compliance:

yes

Specific details on test material used for the study:

Electrode binder [CAS No. 65996-93-2]
- Name of test material (as cited in study report): 101.110
- Physical state: solid, black powder

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Source: Harald Schriever, Kaninchenfarm, Bremerförde/Germany
- Age at study initiation: no data
- Weight at study initiation: 2.4 - 2.6 kg
- Housing: cage, single
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: >= 7 d

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18 +-2 °C
- Humidity (%): 50 - 86 %
- Air changes (per hr): no data
- Photoperiod (hrs dark / hrs light): 12 / 12

Vehicle:

unchanged (no vehicle)

Controls:

yes, concurrent no treatment

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 100 mg

Observation period (in vivo):

1, 24, 48, and 72 h post-application

Number of animals or in vitro replicates:

6

Details on study design:

REMOVAL OF TEST SUBSTANCE
- Washing (if done): no, eye not rinsed

SCORING SYSTEM: according to Draize

TOOL USED TO ASSESS SCORE: fluorescein after 24 and 72 h

Irritation parameter:

cornea opacity score

Basis:

animal: #1 - #6

Time point:

other: 1 h

Score:

0

Max. score:

4

Reversibility:

fully reversible

Remarks on result:

no indication of irritation

Irritation parameter:

iris score

Basis:

animal: #1 - #6

Time point:

other: 1 h

Score:

0

Max. score:

2

Reversibility:

fully reversible

Remarks on result:

no indication of irritation

Irritation parameter:

conjunctivae score

Basis:

animal: #1 - #5

Time point:

other: 1 h

Score:

1

Max. score:

3

Reversibility:

fully reversible within: 24 h

Irritation parameter:

conjunctivae score

Basis:

animal #6

Time point:

other: 1 h

Score:

2

Max. score:

3

Reversibility:

fully reversible within: 24h

Irritation parameter:

chemosis score

Basis:

animal: #1, #3, #4

Time point:

other: 1 h

Score:

1

Max. score:

4

Reversibility:

fully reversible within: 24 h

Irritation parameter:

chemosis score

Basis:

animal: #2, #5, #6

Time point:

other: 1 h

Score:

2

Max. score:

4

Reversibility:

fully reversible within: 24 h

Irritant / corrosive response data:

No irritation effects after 24 h (scores 0)

Interpretation of results:

GHS criteria not met

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information

No particular irritation to skin and eye was noted in experimental standard studies.

However, in the presence of UV-light (UVA), photo-induced human skin irritation was observed under working and experimental conditions (Crow et al. 1961).Human exposure to pitch (identity not specified) within a working environment under bright sunlight resulted in skin irritation. In addition, the same pitch experimentally applied on the skin of human volunteers as chloroform solution caused pronounced skin irritation after radiation with UV-light (UVA).The composition of the pitch utilised may be somewhat different from the registration substance due to differences in production conditions and distillation temperature. Basic constituents and consequentially basic effects will be the same for both substances. Thus, it is justified to use this study (Crow et al 1961) to indicate possible irritation effects of coal tar pitch, high temp. under UV-light irradiation.

Justification for classification or non-classification

No irritating effects have been observed after exposure to pitch, coal tar, high-temp. under standard test conditions. Classification for irritation/corrosion is not required.

Potential UV-light induced skin irritating effects (see above) are not taken into account for classification as conditions causing this effect do not correlate to standard test procedures.

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