Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 265-057-8 | CAS number: 64741-56-6 A complex residuum from the vacuum distillation of the residuum from atmospheric distillation of crude oil. It consists of hydrocarbons having carbon numbers predominantly greater than C34 and boiling above approximately 495°C (923°F).
Toxicological Summary
Administrative data
Workers - Hazard via inhalation route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 2.88 mg/m³
- Most sensitive endpoint:
- repeated dose toxicity
DNEL related information
- DNEL derivation method:
- other: ECHA REACH guidance incorporating ECETOC intraspecies AF
- Overall assessment factor (AF):
- 3
- Dose descriptor:
- NOAEC
- Value:
- 8.64 mg/m³
- AF for dose response relationship:
- 1
- Justification:
- Not required; starting point was a NOAEC
- AF for differences in duration of exposure:
- 1
- Justification:
- Chronic study
- AF for interspecies differences (allometric scaling):
- 1
- Justification:
- Allometric scaling not required
- AF for other interspecies differences:
- 1
- Justification:
- Effects at the membrane level such as chemical irritation are considered similar in all species
- AF for intraspecies differences:
- 3
- Justification:
- ECETOC intraspecies AF
- AF for the quality of the whole database:
- 1
- Justification:
- Reliable study available
- AF for remaining uncertainties:
- 1
- Justification:
- Not required
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
DNEL related information
Workers - Hazard via dermal route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
Workers - Hazard for the eyes
Local effects
- Hazard assessment conclusion:
- no hazard identified
Additional information - workers
General Population - Hazard via inhalation route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 0.61 mg/m³
- Most sensitive endpoint:
- repeated dose toxicity
DNEL related information
- DNEL derivation method:
- other: ECHA REACH guidance incorporating ECETOC intraspecies AF
- Overall assessment factor (AF):
- 5
- Dose descriptor:
- NOAEC
- Value:
- 3.1 mg/m³
- AF for dose response relationship:
- 1
- Justification:
- Not required; starting point was a NOAEC
- AF for differences in duration of exposure:
- 1
- Justification:
- Chronic study
- AF for interspecies differences (allometric scaling):
- 1
- Justification:
- Allometric scaling not required
- AF for other interspecies differences:
- 1
- Justification:
- Effects at the membrane level such as chemical irritation are considered similar in all species
- AF for intraspecies differences:
- 5
- Justification:
- ECETOC intraspecies AF
- AF for the quality of the whole database:
- 1
- Justification:
- Reliable study available
- AF for remaining uncertainties:
- 1
- Justification:
- Not required
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
DNEL related information
General Population - Hazard via dermal route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
General Population - Hazard via oral route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
Acute/short term exposure
- Hazard assessment conclusion:
- no hazard identified
DNEL related information
General Population - Hazard for the eyes
Local effects
- Hazard assessment conclusion:
- no hazard identified
Additional information - General Population
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
