Registration Dossier

Categories

Categories

Category name:
Low Benzene Naphthas LOA

Justifications and discussions

Category definition:
low benzene naphthas
Category rationale:
The low benzene naphthas category contains hydrocarbons (aliphatic, aromatic and olefinic) with carbon numbers predominantly in the C5-C12 range and boiling from 30C to 300C. Members of this category contain <0.1% benzene and contain varying amounts of toluene, xylenes and n-hexane. Some category members contain PAHs, where this is the case anthracene has been quantified. Category members are typically produced by the distillation of products from a steam cracking process or by pyrolysis. 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 to phys-chem and environmental fate and effect properties read-across is valid.

With regard to mammalian endpoints, category members are liquids with inhalation the major route of potential exposure. The primary health effect by inhalation is likely to be irritation after short term high exposure with potential for CNS effects. No significant health effects are anticipated from longer term exposures, other than those driven by toluene which is present in some streams.