Registration Dossier
Registration Dossier
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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
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: 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
Henry's Law constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- Henry's law constant
- 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:
- The Henry's law constant has been claculated from the ratio of vapour pressure and solubility.
- GLP compliance:
- no
- H:
- 231.6 Pa m³/mol
- H:
- 0.002 atm m³/mol
- Executive summary:
The Henry constant was determined to be 231.6 Pm3/mol.
Reference
Description of key information
Due to the relatively high vapour pressure and low to moderate water solubilty, volatilisation from water to the atmosphere is an important distribution process for styrene. The Henry's law constant value of 232 Pa m³ / mol, calculated from vapour pressure and water solubility, indicates rapid volatilisation from surface waters.
From the water surface, the substance will rapidly evaporate into the atmosphere
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 232
- at the temperature of:
- 20 °C
Additional information
The volatilisation half-life of styrene from a body of water one metre deep, with a current velocity of 1 m/s and a wind velocity of 3 m/s is calculated to be about three hours. The U.S. EPA estimated that half-lives of styrene were three days in a pond and thirteen days in an oligotrophic lake (Environment Canada, 1993). Under laboratory conditions, Fu and Alexander (1992) found that styrene volatilised rapidly from shallow layers of lake water, 50% being lost in 1-3 hours. The half-life for volatilisation of styrene from soil surfaces was estimated to be approximately one minute with the rate of volatilisation decreasing with increasing depth (Environment Canada, 1993). Fu and Alexander (1992) found that volatilisation from soil was slower than from water, with 26% volatilisation from a 1.5 cm depth of soil in 31 days.
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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