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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
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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).
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
![](https://chesar.echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
Endpoint summary
Administrative data
Description of key information
Additional information
Data 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 endpoints.
High 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.
High 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 state anyway.
DCPD 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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