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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).
Standard biodegradation studies are not applicable to petroleum UVCB
substances, therefore in accordance with Annex XI Section 1.3 testing is
not scientifically necessary and the endpoint has been fulfilled using
QSAR calculations for relevant constituents. Full justifications for
this QSAR are presented in 'Attached justification', but in brief these
are justified because:
- the results are obtained from a QSAR model whose scientific validity
has been established
- petroleum substances fall within the applicability domain of the QSAR
- results are adequate for the purposes of risk assessment
- adequate and reliable documentation is provided
Calculated degradation half-lives for constituents of this substance
range between 1.74 and 661986 days. It should be borne in mind that this
is the full range of predicted values, and that this may be misleading
or unrepresentative of the properties of the UVCB substance as a whole.
The range should therefore be treated with caution and not taken out of
context. The substance is a hydrocarbon UVCB. Standard tests for this
endpoint are intended for single substances and are not appropriate for
this complex substance. However, this endpoint is characterised using
quantitative structure property relationships for representative
hydrocarbon structures that comprise the hydrocarbon blocks used to
assess the environmental risk of this substance with the PETRORISK model
(see Product Library in PETRORISK spreadsheet attached in IUCLID section
13). For purposes of PBT assessment, the substance has been assessed
using a combination of QSAR predictions and confirmatory experimental
testing for representative constituents using a hydrocarbon block
approach. For details see report titled 'Evaluation of PBT for Petroleum
Substances' in IUCLID section 13.
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.
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