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Category name:
Resin Oils & Cyclic Dienes LOA

Justifications and discussions

Category definition:
Resin oils and cyclic dienes
Category rationale:
The Resin oils and cyclic dienes category covers hydrocarbons typically produced by the distillation of products from a steam cracking process. Imported streams will need to confirm that they meet the chemical description and are in domain. The category contains non-hydrotreated products (the Resin Oil products) and two products that are concentrates (1) dicyclopentadiene (DCPD) and (2) methylcyclopentadiene dimer (MCPD). Member of this category will have a carbon number distribution that is predominantly C5 – C15 and may contain more than 0.1 % isoprene and/or more than 0.1% benzene or 1,3-butadiene. Companies importing streams will need to confirm that such streams meet the chemical description and are in domain. By definition, from the category, these streams have overlapping hydrocarbon compositions, within a defined range, and hence, will have similar properties. It is therefore reasonable to assume that the components of the category will behave in a reasonably predictable manner, and with respect phys-chem and environmental fate and effect properties read-across is valid For mammalian endpoints, the predominant route of exposure will be by inhalation and in those streams that contain benzene, butadiene and isoprene these will be the major drivers for effects. For mammalian endpoints, the classification of these streams will be driven by the content of benzene, 1,3-butadiene or isoprene when more than 0.1%, by the content of naphthalene when more than 1%, and by the content of toluene when more than 5%.