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EC number: 906-484-8 | 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
Reaction mass of DIPE and 2-methylpent-2-ene consists of moderately volatile organic substances (
overall vapour pressure 128 hPa at 20°C and 155 hPa at 25°C, all known constituents in the range of 5 – 250 hPa at 20°C considered as moderately volatile) of relatively low molecular weight (average ca. 93 g/mol). An overall Henry’s law constant (H) calculated from the parameters used for exposure assessment is 420 Pa m3/mol (at 20°C). According to the TGD IR & CSA R7a (p.191), chemicals with H values around 100 Pa m3/mol are considered to volatilise rapidly from the water compartment. At the same time the reaction mass is soluble in water (2.8 g/L). Vapour pressure for the two main components DIPE and 2-methylpent-2-ene are similar (ca. 200 hPa at 25°C). DIPE is soluble in water (ca. 3.1 g/L), but 2-methylpent-2-ene was estimated to be only slightly water soluble (ca. 0.08 g/L). Based on these data, DIPE and 2-methylpent-2-ene are predicted to volatilise rapidly from water based on estimated Henry’s law constants, with a more rapid volatilization of 2-methylpent-2-ene due to lower water solubility. Both compounds will be rapidly oxidized in the atmosphere (estimated atmospheric oxidation half-lives of ca. 1.5 - 5 hours). DIPE is not readily biodegradable, while 2-methylpent-2-ene is predicted to be readily biodegradable. At least inherent biodegradability is supported by conclusions on biodegradability of higher olefins (C6-C18) [1]. DIPE shows a low potential for adsorption as the log Pow value, based on literature data and a measurement with the reaction mass using the HPLC method is below 3. The estimated log Kow for 2-methyl-2-pentene using QSAR is 3.1, the estimated log Koc 2.1 - 2.7. With the HPLC method, the highest determined log Pow was 4.3 with a corresponding highest log Koc of 2.6 (Koc = 362). These values, that may probably be assigned to 2-methylpent-2-ene and/or other methylpentene or methylpentane isomeres, indicate a moderate potential for adsorption. Chemicals with a Koc value between 150 and 500 are likely to move through the soil at a moderate rate [2]. Strong binding to soil particles is only expected for a log Pow > 5 or log Koc > 4 and adsorption to sediment it not expected below a log Koc of 2.7 - 3 (TGD IR & CSA R7 p.154). Overall, other methylpentene isomers and methylpentane [3] are expected to distribute in the environment in a similar way to 2-methylpent-2-ene. None of the constituents of the reaction mass of DIPE and 2-methylpent-2-ene are considered to bioaccumulate (see chapter 8).
[1] OECD SIDS: Higher Olefins-Category, SIDS Initial Assessment Report ForSIAM19; Berlin, Germany, 19-21 October 2004, prepared by the American Chemistry Council, Higher Olefins Panel
[2] Swann RL, Laskowshi DA, McCall PJ, Vander-Kuy K and Disburger HJ (1983). A rapid method for the estimation of the environmental parameters octanol/water partition coefficient, soil sorption constant, water to air ratio and water solubility.Residue Reviews 85, 17-28.
[3] Data for CAS 107-83-5 in HSDB database http://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?HSDB, last accessed March 2010.
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