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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 265-196-4 | CAS number: 64742-93-4 A complex black solid obtained by blowing air through a heated residuum, or raffinate from a deasphalting process with or without a catalyst. The process is principally one of oxidative condensation which increases the molecular weight.
Endpoint summary
Administrative data
Description of key information
Additional information
Key study data are available for each physicochemical endpoint for oxidized asphalt which is a solid or semi-solid (CONCAWE, 1992a) at ambient temperature (20°C) and pressure (101.3 kPa). Since oxidized asphalt gradually softens with increasing temperature, softening points are measured instead of melting point values. Softening points for oxidized asphalt fall in the range of approximately 38-130°C (CONCAWE, 1992a; Shell, 2003; CONCAWE, 2010a). Oxidized asphalt in general has a boiling point >308°C (CONCAWE, 2010a, CONCAWE 1992a). The density of oxidized asphalt ranges from 1.02 to 1.107 at 15°C (CONCAWE, 2010a) while vapour pressure is expected to be extremely low (<<0.1 kPa) at ambient temperature (CONCAWE, 1992a).
Flash points for oxidized asphalt are generally >250°C (CONCAWE 1992a, CONCAWE, 2010a; Shell, 2003) while self-ignition temperature/auto flammability values are expected to be >400°C, by analogy with other bitumens (TOTAL 1979; Shell, 2003). Viscosity values range from 100 - 1000 mm2/s at 200°C and 122 – 333 mPa.s at 180°C (CONCAWE, 1992a, CONCAWE 2010a).
Based on information available on the properties of oxidized asphalt, specific data are not presented for the following endpoints: partition co-efficient, water solubility, granulometry, surface tension, stability in organic solvents, explosiveness, oxidising properties and dissociation constant. Appropriate waiving statements are provided to indicate why data for these REACH endpoints are not applicable. The physico-chemical data presented are considered representative for oxidized asphalt.
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.
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