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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 265-058-3 | CAS number: 64741-57-7 A complex combination of hydrocarbons produced by the vacuum distillation of the residuum from atmospheric distillation of crude oil. It consists of hydrocarbons having carbon numbers predominantly in the range of C20 through C50 and boiling in the range of approximately 350°C to 600°C (662°F to 1112°F). This stream is likely to contain 5 wt. % or more of 4- to 6-membered condensed ring aromatic hydrocarbons.
Toxicological Summary
Administrative data
Workers - Hazard via inhalation route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 0.18 mg/m³
- Most sensitive endpoint:
- developmental toxicity / teratogenicity
DNEL related information
- DNEL derivation method:
- other: ECHA REACH guidance procedure but incorporating ECETOC intraspecies AF
- Overall assessment factor (AF):
- 22.5
- Dose descriptor starting point:
- LOAEL
- Value:
- 1 mg/kg bw/day
- Modified dose descriptor starting point:
- LOAEC
- Value:
- 4.1 mg/m³
- Explanation for the modification of the dose descriptor starting point:
Starting point LOAEL (dermal teratology study): x [1/0.43 {Adjust the human dermal uptake to rat with adjustment factor of 0.43 to account for increased rat absorption}] x [1/0.38]{for route to route extrapolation}] x [6.7/10]{light activity rate}] = 4.5 mg/m3
- AF for dose response relationship:
- 3
- Justification:
- LOAEL to NOAEL conversion
- AF for differences in duration of exposure:
- 1
- Justification:
- Not required
- AF for interspecies differences (allometric scaling):
- 1
- Justification:
- Allometric scaling not required
- AF for other interspecies differences:
- 2.5
- Justification:
- Interspecies AF (ECHA R.8)
- 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:
- DNEL (Derived No Effect Level)
- Value:
- 4 716.8 mg/m³
- Most sensitive endpoint:
- acute toxicity
- Route of original study:
- By inhalation
DNEL related information
- DNEL derivation method:
- other: ECHA REACH guidance procedure but incorporating ECETOC intraspecies AF
- Overall assessment factor (AF):
- 7.5
- Dose descriptor starting point:
- NOAEC
- Value:
- 3 300 mg/m³
- Modified dose descriptor starting point:
- NOAEC
- Value:
- 35 376 mg/m³
- Explanation for the modification of the dose descriptor starting point:
Starting point NOAEC (acute rat LC50 inhalation study): x 4 hrs/day; adjusted for duration of work [4/0.25 {hrs/day}] x [6.7/10 {light work ventilation rate}]
- AF for dose response relationship:
- 1
- Justification:
- Not required: starting point was a NOAEC
- AF for interspecies differences (allometric scaling):
- 1
- Justification:
- Allometric scaling not required
- AF for other interspecies differences:
- 2.5
- Justification:
- Interspecies AF (ECHA R.8)
- 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
Local effects
Long term exposure
- Hazard assessment conclusion:
- no hazard identified
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:
- DNEL (Derived No Effect Level)
- Value:
- 0.065 mg/kg bw/day
- Most sensitive endpoint:
- developmental toxicity / teratogenicity
- Route of original study:
- Dermal
DNEL related information
- DNEL derivation method:
- other: ECHA REACH guidance procedure but incorporating CONCAWE intra/interspecies AF
- Overall assessment factor (AF):
- 36
- Dose descriptor starting point:
- LOAEL
- Value:
- 1 mg/kg bw/day
- Modified dose descriptor starting point:
- LOAEL
- Value:
- 2.3 mg/kg bw/day
- Explanation for the modification of the dose descriptor starting point:
Starting point LOAEL (dermal teratology study): x [1/0.43 {Adjust the human dermal uptake to rat with adjustment factor of 0.43 to account for increased rat absorption}]
- AF for dose response relationship:
- 3
- Justification:
- LOAEL to NOAEL
- AF for differences in duration of exposure:
- 1
- Justification:
- Not required
- AF for interspecies differences (allometric scaling):
- 4
- Justification:
- Interspecies rat to human
- AF for other interspecies differences:
- 1
- Justification:
- Not required
- 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
Local effects
Long term exposure
- Hazard assessment conclusion:
- high hazard (no threshold derived)
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:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
General Population - Hazard via dermal route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
Local effects
Long term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
Acute/short term exposure
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
General Population - Hazard via oral route
Systemic effects
Long term exposure
- Hazard assessment conclusion:
- DNEL (Derived No Effect Level)
- Value:
- 0.015 mg/kg bw/day
- Most sensitive endpoint:
- repeated dose toxicity
- Route of original study:
- Dermal
DNEL related information
- DNEL derivation method:
- other: ECHA REACH guidance incorporating ECETOC intraspecies AF
- Overall assessment factor (AF):
- 40
- Dose descriptor starting point:
- NOAEL
- Value:
- 1.06 mg/kg bw/day
- Modified dose descriptor starting point:
- NOAEL
- Value:
- 0.61 mg/kg bw/day
- Explanation for the modification of the dose descriptor starting point:
Starting point NOAEL (Subchronic dermal rat study): x [1/0.43 {Adjust the human dermal uptake to rat with adjustment factor of 0.43 to account for increased rat absorption}] x 8 hours per Day, 5 days per week [8/24{hours per day} {5/7{days per week}]
- AF for dose response relationship:
- 1
- Justification:
- Not required: starting point a NOAEL.
- AF for differences in duration of exposure:
- 2
- Justification:
- Subchronic to chronic (ECHA R.8)
- AF for interspecies differences (allometric scaling):
- 4
- Justification:
- Interspecies rat to human (ECHA R.8)
- AF for other interspecies differences:
- 1
- Justification:
- Not required
- 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:
- hazard unknown but no further hazard information necessary as no exposure expected
DNEL related information
General Population - Hazard for the eyes
Local effects
- Hazard assessment conclusion:
- hazard unknown but no further hazard information necessary as no exposure expected
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.
