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EC number: 270-790-1
CAS number: 68478-10-4
A complex combination of hydrocarbons obtained by the distillation of debenzenized light steam-cracked naphtha. It consists predominantly of cyclic olefinic and aromatic hydrocarbons having carbon numbers predominantly in the range of C8 through C16 and boiling in the range of approximately 130°C to 300°C (226°F to 572°F).
on physical properties were obtained from a number of proprietary and
secondary sources. The data in the secondary sources are based on a
critical evaluation of peer-reviewed data and the selected values are
considered to be reliable and representative of the property under
investigation. Information on the review process was documented in the
introduction of the source. The use of Klimisch codes (Klimisch et al.
1997) was extended to these secondary sources and a reliability code of
(2) valid with restrictions was assigned when using the authoritative
secondary source. The data in the proprietary sources are taken from
non-GLP, company specific datasheets, either with or without test
guidelines. Although there is limited data available, as the results
have been taken from company pro-forma, they have been assigned a
reliability code of (2) reliable with restrictions and are considered
suitable for use as supporting studies for the physico-chemical
purity DCPD is a crystalline solid at ambient temperature, whilst
commercial DCPD is a liquid. The melting point of DCPD varies with the
purity of the sample, with melting points of <0°C at <85% purity, rising
to 10°C at >90% purity and >30°C at 100% purity. Therefore,
physico-chemical data are presented, where available for both the pure
(solid) and impure (liquid) forms of DCPD.
purity DCPD is a solid at ambient temperature and commercial DCPD is a
liquid. Physico-chemical properties are presented in the dossier, where
available, for both the solid and liquid forms of the substance. For
(eco)toxicity, since DCPD is dissolved in aqueous media or vehicles,
there is not expected to be any difference in the test results between
the two forms of the substance. For toxicity, it is expected that the
hazards associated with DCPD would not change for the different forms of
the substance. There may be some potential theoretical change in DCPD
active entity (i.e. nominal versus actual dose and small changes in
dimers amount (see SIP) etc.) but, generally testing has been conducted
with high purity DCPD dissolved in a proper vehicle so there should be
no difference between the exposure to the solid and liquid physical
is a liquid or low melting point solid, depending on the purity of the
substance, and therefore the flammability classification has been based
on the flash point of the substance in combination with its boiling
point. DCPD has a harmonised classification as Flammable Liquid Category
2 under CLP. High purity DCPD has coincident melting and flash points at
32°C and a boiling point of 172°C. Commercial DCPD has a melting point
of <0°C to >30°C depending on the purity, a flash point of >23°C and a
boiling point of 80 -190°C. Therefore, as both high purity and
commercial DCPD have flash points of between 23°C and 60°C, a
self-classification of Flammable Liquid Category 3 would be indicated by
the CLP criteria.
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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