Registration Dossier
Registration Dossier
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EC number: 266-023-5 | CAS number: 65996-88-5 The distillate from coke oven light oil having an approximate distillation range below 100°C (212°F). Composed primarily of C4 to C6 aliphatic hydrocarbons.
Endpoint summary
Administrative data
Description of key information
An assesment of acute oral, dermal and inhalation toxicity was made based on the identified compounds and as a high level of identification was achieved, this approach is considered justified.
Some components were found to be non-toxic within the CLP classification limits based on the available data
* Benzene (oral LD50 > 2000 mg/kg; dermal LD50> 8260 mg/kg and inhalation 4 hour LC50 >44.5 mg/L)
* Toluene (oral LD50 > 5000 mg/kg; dermal LD50> 5000 mg/kg and inhalation 4 hour LC50 >20 mg/L)
* 1,3 -butadiene (oral LD50 5480 mg/kg and inhalation 4 hour LC50 285 mg/L )
A literature search also revealed some components exhibited some toxicity, although sometimes above CLP classification limits:
* Carbon disulphide (oral LD50 1200 mg/kg and inhalation 4 hour LC50 10.35 mg/L)
* Pentadiene: no data found
* Cyclopentadiene (oral LD50 113 mg/kg and dermal LD50 430 mg/kg)
* Dicyclopentadiene (oral LD50 353 mg/kg; dermal LD50 5080 mg/kg and inhalation 4 hour LC50 1.972 mg/l )
Therefore an ATE calculation was performed with 3% 1,3 butadiene, 5% 1,4 pentadiene, 25% CS2, 56% (di)cyclopentadiene, 6% benzene and 5% unknown components. In case of (di)cyclopentadiene a worst case approach was followed where the most toxic of both compounds was assumed for each exposure route. This because the two components are interchangeable depending on the circumstances, although the on-site isolated intermediate generally contains dicyclopentadiene. Where no values were available this was calculated as unknown toxicity.
ATE oral 194 mg/kg
=> Acute tox. cat 3
ATE dermal 476 mg/kg
=> Acute tox. cat 3
ATE inhalation 3.24 mg/L(4h)
=> Acute tox. cat 3
In addition benzol forerunnings (coal) consists of hydrocarbons with a low boiling point and of low viscosity, therefore a classification for aspiration hazard is also justified.
Key value for chemical safety assessment
Additional information
Justification for classification or non-classification
Benzol forerunnings (coal) consists of hydrocarbons with a low boiling point and low viscosity which are indicative for an aspiration hazard, therefore the substance has to be classified as H304 (Asp. Tox. 1)
An assesment of acute oral, dermal and inhalation toxicity was made based on the identified compounds and as a high level of identification was achieved, this approach is considered justified.
Some components were found to be non-toxic within the CLP classification limits based on the available data
* Benzene (oral LD50 > 2000 mg/kg; dermal LD50> 8260 mg/kg and inhalation 4 hour LC50 >44.5 mg/L)
* Toluene (oral LD50 > 5000 mg/kg; dermal LD50> 5000 mg/kg and inhalation 4 hour LC50 >20 mg/L)
* 1,3 -butadiene (oral LD50 5480 mg/kg and inhalation 4 hour LC50 285 mg/L )
A literature search also revealed some components exhibited some toxicity, although sometimes above CLP classification limits:
* Carbon disulphide (oral LD50 1200 mg/kg and inhalation 4 hour LC50 10.35 mg/L)
* Pentadiene: no data found
* Cyclopentadiene (oral LD50 113 mg/kg and dermal LD50 430 mg/kg)
* Dicyclopentadiene (oral LD50 353 mg/kg; dermal LD50 5080 mg/kg and inhalation 4 hour LC50 1.972 mg/l )
Therefore an ATE calculation was performed with 3% 1,3 butadiene, 5% 1,4 pentadiene, 25% CS2, 56% (di)cyclopentadiene, 6% benzene and 5% unknown components. In case of (di)cyclopentadiene a worst case approach was followed where the most toxic of both compounds was assumed for each exposure route. This because the two components are interchangeable depending on the circumstances, although the on-site isolated intermediate generally contains dicyclopentadiene. Where no values were available this was calculated as unknown toxicity.
ATE oral 194 mg/kg
=> Acute tox. cat 3
ATE dermal 476 mg/kg
=> Acute tox. cat 3
ATE inhalation 3.24 mg/L(4h)
=> Acute tox. cat 3
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