Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Key study data are available for relevant physicochemical endpoints for unrefined/acid treated oils. All substances in the category are hydrocarbon liquids with a variable viscosity (CONCAWE, 2009) at ambient temperature (20°C) and pressure (101.3 kPa). There is no guideline method available for this endpoint and data presented are based on visual observation, supported by data on melting point/pour point and viscosity. The pour point for chemicals in this category ranges from -35 to 75°C (Sequeira, 1994) while the boiling point ranges from 210 to 800°C (CONCAWE, 2010a; CONCAWE, 1997). The density ranges from 0.83 to 0.98 g/cm3 at 15°C (CONCAWE, 2010a; ExxonMobil Corporation) and the vapour pressure is <0.0058 Pa 20°C (US EPA, 2000).


Flash points for unrefined/acid treated oils are generally >98°C (CONCAWE, 2010a). Unrefined/acid treated oils are not considered to be flammable or explosive, and do not meet EU classification criteria for oxidising properties. The kinematic viscosity of substances in this category ranges from 2.5 to 30 mm²/s at 100°C and is >2 mm2/s at 40°C (CONCAWE, 2010a).


Based on information available on the properties of the substances that comprise the unrefined/acid treated oils category of chemicals, specific data are not presented for the following endpoints: partition co-efficient, water solubility, granulometry, surface tension, flammability, auto flammability, explosiveness, oxidising properties, stability in organic solvents, 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 the substances included in the category unrefined/acid treated oils.