Hydrocarbons, C14-C18, n-alkanes, isoalkanes, cyclics, aromatics (2-30 %)

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

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

Adequacy of study:

key study

Study period:

1985-07-11 to 1985-07-31

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Acceptable well-documented study report which meets basic scientific principles: GLP

Justification for type of information:

The justification for read across is provided as an attachment in IUCLID Section 13.

Cross-reference

Reason / purpose for cross-reference:

read-across: supporting information

Reference

Endpoint:

acute toxicity: dermal

Type of information:

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

Adequacy of study:

key study

Study period:

1985-07-11 to 1985-07-31

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Acceptable well-documented study report which meets basic scientific principles: GLP

Justification for type of information:

The justification for read across is provided as an attachment in IUCLID Section 13.

Reason / purpose for cross-reference:

read-across source

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 1 700 mg/kg bw

Remarks on result:

other: (dose converted from >2 mL/kg bw)

Mortality:

There were no animal deaths prior to study termination.

Clinical signs:

other: Well-defined erythema was noted upon removal of the test patches in all animals exposed to BP83HF, generally persisting for a further 24 hours. Scab formation was subsequently observed on Day 5 and skin flaking was noted on Day 6 in all treated animals, p

Gross pathology:

Post mortem examination of all animals killed at termination revealed an area of diffuse subcutaneous haemorrhage beneath the dorsal patch site in one male exposed to BP83HF. However, no other findings considered to be related to treatment were observed and no tissues were processed further for histopathological examination.

Other findings:

GROSS POSTMORTEM EXAMINATION

No alterations were noted.

Interpretation of results:

other: Not classified

Remarks:

Criteria used for interpretation of results: EU

Conclusions:

The LD50 of BP83HF was > 2 ml/kg (converted 1.7 g/kg). Classification as an acute dermal toxicant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.

Executive summary:

This data is being read across from the source study that tested Hydrocarbons, C11-C20, n-alkanes, isoalkanes, cyclics, aromatics (2-30%) based on analogue read across.

Five male and five female rabbits were exposed to BP83HF for 24h via an occluded patch.  Dermal evaluations occurred at 24 hours post patch removal and once daily until the study termination at day14. Exposure had no effect on viability; all animals survived the exposure.  The LD50 of BP83HF was > 2 ml/kg (converted 1.7 g/kg). Classification as an acute dermal toxicant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1985

Report date:

1985

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

yes

Remarks:

used occlusive wrap

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Hydrocarbons, C11-C20, n-alkanes, isoalkanes, cyclics, aromatics (2-30%)

IUPAC Name:

Hydrocarbons, C11-C20, n-alkanes, isoalkanes, cyclics, aromatics (2-30%)

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles Rivers UK Ltd
-Sex: Male (10); Female (10)
- Age at study initiation: 6 weeks
- Weight at study initiation: Male: 125-135g; Female: 110-115g
- Housing: individually housed
- Diet (e.g. ad libitum): No. 1, expanded pelleted maintenance diet for rats and mice from Special Diet Services Ltd., ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: 6-day acclimatisation


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22-25
- Humidity (%): 58-90
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Type of coverage:

occlusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

On the day prior to application the trunk of each animal was clipped free of hair. For each treated animal, 2 mL/kg of BP83HF was applied to a patch of absorbent paper. The patch was applied to the trunk and held in place beneath a polythene sleeve under a Poroplast bandage. The whole patch assembly was held in place with tape. The patches were left in position for approximately 24 hours. Patches were similarly applied to control animals with the omission of test material. To prevent the animals from gaining access to the sites of application (and hence possibly ingesting traces of test material), collars were applied around the animals heads for a further 24 hours (control and test animals).

Duration of exposure:

24 hours

Doses:

Control: (5) males; (5) female
2 ml/kg (converted 1.7 g/kg): (5) males; (5) females

No. of animals per sex per dose:

Animals: (10) males; (10) female per dose for a total of 20 animals

Control animals:

yes

Details on study design:

SCORING SYSTEM: Draize scale
- Dermal response observations: daily
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight

Statistics:

Differences between treated and control group mean values for bodyweight gain were analysed by Student's t-test. Where individual variance ratios were significant (P <0.05 or less), Cochran's approximation was applied (Snedecor and Cochran, Statistical Methods, 6th Ed. Iowa State. 1973). Where zero variance was found in one or more groups, intergroup comparison was performed by the Wilcoxon Rank Sum Test.

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 1 700 mg/kg bw

Remarks on result:

other: (dose converted from >2 mL/kg bw)

Mortality:

There were no animal deaths prior to study termination.

Clinical signs:

other: Well-defined erythema was noted upon removal of the test patches in all animals exposed to BP83HF, generally persisting for a further 24 hours. Scab formation was subsequently observed on Day 5 and skin flaking was noted on Day 6 in all treated animals, p

Gross pathology:

Post mortem examination of all animals killed at termination revealed an area of diffuse subcutaneous haemorrhage beneath the dorsal patch site in one male exposed to BP83HF. However, no other findings considered to be related to treatment were observed and no tissues were processed further for histopathological examination.

Other findings:

GROSS POSTMORTEM EXAMINATION

No alterations were noted.

Applicant's summary and conclusion

Interpretation of results:

other: Not classified

Remarks:

Criteria used for interpretation of results: EU

Conclusions:

The LD50 of BP83HF was > 2 ml/kg (converted 1.7 g/kg). Classification as an acute dermal toxicant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.

Executive summary:

Five male and five female rabbits were exposed to BP83HF for 24h via an occluded patch.  Dermal evaluations occurred at 24 hours post patch removal and once daily until the study termination at day14. Exposure had no effect on viability; all animals survived the exposure.  The LD50 of BP83HF was > 2 ml/kg (converted 1.7 g/kg). Classification as an acute dermal toxicant is not warranted under the new Regulation (EC) 1272/2008 on classification, labeling and packaging of substances and mixtures (CLP) or under Directive 67/518/EEC for dangerous substances and Directive 1999/45/EC for preparations.