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EC number: 272-183-7 | CAS number: 68783-07-3 A complex combination obtained from various refinery processes. It consists of hydrogen, hydrogen sulfide and hydrocarbons having carbon numbers predominantly in the range of C1 through C5.
- 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
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Endpoint summary
Administrative data
Description of key information
The substances in the category are gases and will predominantly partition to the atmosphere, which will limit the aquatic toxicity. Due to the difficulty associated with conducting aquatic toxicity tests, experimental data were available for only one member of this category: Benzene (CAS 71-43-2). The lowest acute and chronic toxicity values for benzene are an 96-hour LC50 for Oncorhynchus mykiss of 5.3 mg/L and a 32-day NOEC for Pimephales promelas of 0.8 mg/L.
In the absence of measured data, data for the other representative constituents of the category were predicted using the QSAR model ECOSAR (Program v1.00 in EPI Suite v4.00). The short term toxicity of the constituents was predicted to range from 6.97 mg/L to 623 mg/L for the different aquatic taxonomic groups.The long term toxicity of the constituents was predicted to range from 0.834 mg/L to 51.5 mg/L for the different aquatic taxonomic groups.
Additional information
Experimental data
The 96-hour LC50 for benzene for Oncorhynchus mykiss was 5.3 mg/L.
The 32-day NOEC for benzene for Pimephales promelas was 0.8 mg/L.
The 48-hour EC50 for benzene for Daphnia magna was 10 mg/L.
The 7-day NOEC for benzene for Ceriodaphnia dubia was 3 mg/L.
The 72-hour EC50 and EC10 for benzene for Pseudokirchneriella subcapitata were 100 mg/L and 34 mg/L, respectively.
QSAR data
The model predicted LC50 for short-term toxicity to fish to range from 11.4 mg/L to 623 mg/L.
The model predicted chronic value for long-term toxicity to fish to range from 1.22 mg/L to 51.5 mg/L.
The model predicted EC50 for short-term toxicity to aquatic invertebrates to range from 6.97 mg/L to 307 mg/L.
The model predicted chronic value for long-term toxicity to aquatic invertebrates to range from 0.834 mg/L - 19.9 mg/L.
The model predicted EC50 for short-term toxicity to aquatic algae and cyanobacteria to range from 7.04 mg/L to 124 mg/L, whereas the chronic value for long-term toxicity to aquatic algae and cyanobacteria was predicted to range from 2.17 mg/L to 23.5 mg/L.
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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