Registration Dossier
Registration Dossier
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EC number: 265-198-5 | CAS number: 64742-94-5 A complex combination of hydrocarbons obtained from distillation of aromatic streams. It consists predominantly of aromatic hydrocarbons having carbon numbers predominantly in the range of C9 through C16 and boiling in the range of approximately 165°C to 290°C (330°F to 554°F).
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
The melting point of high purity DCPD is 32.2°C. The melting point of commercial DCPD is <20°C, with melting points of <0°C at <85% purity, rising to 10°C at >90% purity and >30°C at 100% purity.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 32.2 °C
Additional information
The Pocket Guide presents key information and data from the US Department of Health and Human Services and as such is a reliable governmental source of information and is considered a suitable key study source for this endpoint (NIOSH 2005). This is supported by a melting/ freezing point of between 32 and 34°C from WHO ICSC (2005). No information on the primary source of the data or the methods used is available. However, this information is taken from a reliable peer reviewed database and so can be considered reliable and suitable for use.
Information on the melting/ freezing points of commercial DCPD has been taken from company specific pro-forma. For the data from DOW (2016), there is no information on the GLP status or the methods used. The melting point of commercial (94%) DCPD from proprietary data from Shell (2016) was non-GLP but conducted according to guideline ASTM D1493. The results are considered suitable for use as supporting studies for this endpoint as they are taken from company specific datasheets.
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