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Diss Factsheets
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EC number: 202-851-5 | CAS number: 100-42-5
- 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
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The reaction of styrene with ozone in the vapor phase have been investigated in static and dynamic systems.
- GLP compliance:
- no
- Light source:
- not specified
- DT50:
- 9.2 h
- Transformation products:
- not specified
- Validity criteria fulfilled:
- not applicable
- Executive summary:
Styrene was tested for phototransformation in air. The Rate constant was determined to be 2.99 • 10-17 cm3 • molecule-1• s-1 and the Half-live is 9.2 h.
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The experimental technique, is based on observing the increased rate of ozone decay in the presence of a known excess of a reactive compound.
- GLP compliance:
- no
- Light source:
- not specified
- Details on test conditions:
- Reactions were carried out in a -175- liter volume Teflon bag, constructed out of a 2-mil thick, 180 X 140 cm FEP Teflon sheet, heat sealed around the edges, and fitted with Teflon injection and sampling ports at each end of the bag. Initial O3 concentrations were 12.40 X 1013 molecule cm-3, and the O3 concentrations were monitored as a function of time after mixing of the reactants by a Monitor Labs model 8410 chemiluminescent ozone analyzer. Background ozone decay rates, in the absence of the reactants, were determined periodically during these rate constant determinations.
The organic reactant concentrations in the entire bag were calculated from the amount of organic introduced and the total volume of air used to fill the Teflon bag. It was observed that for the alkenes, both gaseous and liquid, these calculated organic concentrations agreed to within better than ±10% with the concentrations quantitatively measured by gas chromatography. All reactions were carried out at room temperature - Reference substance:
- not specified
- DT50:
- 12.7 h
- Transformation products:
- not specified
- Validity criteria fulfilled:
- not applicable
- Executive summary:
Styrene was tested for phototransformation in air. The Rate constant was determined to be 2.16 · 10-17 cm3 • molecule-1• s-1 and the Half-live is 12.7 h.
- Endpoint:
- phototransformation in air
- Type of information:
- other: review data
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Review data with no special reference to the method used in the experiments with styrene
- GLP compliance:
- no
- Light source:
- not specified
- DT50:
- 7.4 h
- Transformation products:
- not specified
- Validity criteria fulfilled:
- not applicable
- Executive summary:
Styrene was tested for phototransformation in air. The Rate constant was determined to be 5.2 ± 0.5.10-11 cm3 • molecule-1• s-1 and the Half-live is 7.4 h.
Referenceopen allclose all
Rate constant cm3• molecule-1• s-1: 2.99 • 10-17.
Half-life: 9.2 hours.
Tropospheric ozone rapidly degrade styrene in the atmosphere.
Rate constant cm3·molecule-1·s-1: 2.16 · 10-17
Half-life: 12.7 h
Rate constant cm3 • molecule-1• s-1: 5.2 ± 0.5.10-11.
Half-life: 7.4 hours.
Description of key information
After evaporation or exposure to the air, the product will be rapidly degraded by photochemical processes.
Half-lives of 7.4 hours for the reaction with hydroxyl radicals and of 9.2 hours for reaction with ozone have been calculated (Atkinson 1985, Bufalini & Altshuller 1965).
Key value for chemical safety assessment
- Half-life in air:
- 9.2 h
Additional information
Styrene does not adsorb solar radiation appreciably at wavelengths greater than 300 nm, therefore degradation of styrene in air and water by direct photolysis is unlikely.
Hydroxyl radicals and tropospheric ozone rapidly degrade styrene in the atmosphere. Half-lives of 7.4 hours for the reaction with hydroxyl radicals and of 9.2 hours for reaction with ozone have been calculated (Atkinson 1985, Bufalini & Altshuller 1965).
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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