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Diss Factsheets
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EC number: 284-660-7 | CAS number: 84961-70-6
- 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
The primary means of HAB degradation in the environment is biodegradation. Experimental results for HAB do not meet the criteria for ready biodegradation, in large part due to the extremely low solubility in water. Results of the BODIS test for insoluble substances shows HAB biodegradation of 28% within 28 days.
Additional biodegradation data are available on C10-C14dialkylbenzene, a major component (over 70%) of LAB alkylate bottoms. Data from these studies indicate 28-41% mineralization in 28 days and 43-54% mineralization in 48 days. These tests were conducted at concentrations higher than the water solubility of the materials and biodegradation may be more rapid at lower concentrations. Additional data on LAB, which is the most water soluble component of the HABs, indicate that it is readily biodegradable based on a GLP study showing 64% biodegradation after 28 days.
Based on these data and the structural similarities to LAB, the HABs would be expected to undergo faster biodegradation at water soluble concentrations.
Anaerobic and aerobic biodegradation simulation studies in soil were also perfomed using radiolabelled C10 dialkylbenzene, a major category of HAB which comprises 20 -70% of the composition. The testing was perfomed in four different soils with an exposure period of 120 days (in the anaerobic testing, there was a 28 day aerobic exposure period prior to the 120 day anaerobic exposure period). The initial concentration was 5.17 uCi/vessel for the anaerobic test, and 4.55 uCi/vessel for the aerobic test. Half-lives for the substance in the aerobic testing ranged from 23 to 178 days at 20 C. When the results were adjusted for 12 C using the Arrhenius equation, the half-lives ranged from 49 to 378 days. The half-lives determined for the various soils would classify HAB as not persistent (soil #3), persistent (soil #2), and very persistent (soils #1 and #4). Anaerobic degradation was significantly slower with half-lives ranging from 1114 to 4.6E+08 days and 2365 to 8.6E+08 days at 20 and 12 C, respectively.
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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