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Diss Factsheets
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EC number: - | CAS number: -
- 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
Endpoint summary
Administrative data
Description of key information
Additional information
The registration substance 'Paraffin waxes (Fischer-Tropsch), isomerization' is a white solid at standard temperature and pressure.
Given its complex and variable composition and depending on the product grade, this mixture of linear and branched aliphatic hydrocarbons has a measured pour point range of 78 to 90°C (ASTM D97) and a measured boiling range of 375 to >700°C (ASTM D7169). The measured relative density is 0.84 to 0.85 at 15°C (ASTM 4052 and ASTM D1250 table 53A) and the viscosity ranges from about 18 to 21 mm2/s at 100°C mm2/s. The substance has a measured flashpoint of >239°C (ASTM D93, closed cup), a measured autoignition temperature of 422°C (EU Method A.15) and a measured vapour pressure of 1.7 Pa at 20°C (EU Method A.4).
Measured (whole-substance) water solubility and partition coefficient are not available for the registration substance; instead, data of the closely related substance GTL waxy raffinate [C15-50; CAS 848301-87-1, EC 482-130-1] are used, covering the low molecular weight fraction of the registration substance up to C50:
- water solubility: 3.1 mg TOC/L at 20.0±0.5°C (EU Method A.6);
- partition coefficient: log Kow >6.5 at 40 °C and pH7 (EU Method A.8).
The use of these data for the registration substance is considered justified on the basis of the following conclusions:
- water solubility: as the water solubility decreases with increasing carbon chain length, it can be safely concluded that the corresponding result for the (solid) registration substance containing higher molecular weight constituents (C25 - C150, about 30-55% >C50) should be << 3.1 mg TOC/L at 20.0 ± 0.5°C; as key result, a water solubility of approx. 1 mg TOC/L (rather < 1 mg TOC/L) is applied for the registration substance, which is supported by a test result for the closely related (liquid) substance GTL base oil (CAS 848301-69-9, EC 482-220-0), consisting of linear and branched alkanes (paraffins) with a small amount of cycloalkanes in the carbon range from C18 to C50;
- partition coefficient: due to the general trend of decreasing water solubility with increasing carbon chain length/molecule size and the fact that the experimentally determined value for GTL waxy raffinate is based on the highest calibration standard [DDT, limit value of 6.5], it can be safely concluded that the result for the registration substance containing higher molecular weight constituents (C25 - C150, about 30-55 % >C50) would be the same: 3.16 x 106, log10 KOW >6.50.
For the endpoints vapour pressure, water solubility and partition coefficient, predicted property data for relevant constituents were obtained as described in the endpoint study records.
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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