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EC number: 269-110-6 | CAS number: 68187-58-6 The residue from the distillation of thermal cracked or steam-cracked residuum and/or catalytic cracked clarified oil with a softening point from 40°C to 180°C (104°F to 356°F). Composed primarily of a complex combination of three or more membered condensed ring aromatic hydrocarbons.
- 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
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Data for petro pitch are not available. Results from an activated sludge respiratory inhibition test with the supporting substance creosote is used to characterise toxicity of petro pitch to microorganisms. An EL0 of 36 mg/L is determined by extrapolation based on the dose-response curve.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 670 mg/L
- EC10 or NOEC for microorganisms:
- 36 mg/L
Additional information
No experimental data is available for the substance pitch, petroleum, arom. (petro pitch) itself, but data have been identified for pitch, coal tar, high temp. (CTPht) and the tar oil creosote. These are used as supporting substances. Both substances consist of PAH. CTPht is closely structure related to petro pitch and comprises also an inert matrix of highly ring condensed polycyclic aromatic hydrocarbons. PAH constituents of the tar oil creosote are better bioavailable compared to the two pitches. Therefore, exposure to creosote is a worst-case situation.
Toxicity to microorganism was tested with CTPht in a Pseudomonas putida cell multiplication inhibition test (Hillmann E. 1991). No inhibition was detected up to a loading of 10,000 mg/L (EL0 = 10,000 mg/L).
In an activated sludge respiratory inhibition test according to OECD TG 209 (Lebertz H. 2002), an EL50 (effective loading) of 670 mg/L was determined. From the dose-response curve, a non-inhibitory loading (EL0) of ca. 36 mg/L could be extrapolated. This value is used to characterise the toxicity of petro pitch to microorganisms.
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