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Diss Factsheets
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EC number: 201-279-3 | CAS number: 80-43-3
- 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
Dicumyl peroxide is not readily biodegradable.
In a pelagic freshwater simulation study, the primary degradation half-life of dicumyl peroxide (bis(α,α-dimethylbenzyl) peroxide) is estimated at DT50 = 142 d, based on (poorly fitting) single first-order kinetics.
Mineralisation reaches a maximum of 12.9 % after 90 days (at 50 µg/L).
Additional information
Several studies are available investigating the potential of dicumyl peroxide for ready biodegradability. The most recent and reliable study, following OECD guideline 301F (manometric respirometry test) identified mineralisation rates after 28 days of, on average, 20 % at a test substance concentration of 100 mg/L, and of 44 % at 20 mg/L, however with high variability. Accordingly, although dicumyl peroxide fails the criterion for being regarded as “readily biodegradable” the test result shows that the substance is susceptible to mineralisation by biological processes.
In a previous study according to OECD guideline 301 D (closed-bottle test) dicumyl peroxide was not biodegradable after 28 days, but biodegradation was observed in a prolonged test for up to 57 days. This study is considered to be of limited reliability since employing an unsuitably high nominal test concentration (1000 mg/L) and lacking a toxicity control. Nevertheless, also this somewhat deficient study confirms the potential of dicumyl peroxide for biological degradability.
In a pelagic freshwater simulation study, the primary degradation half-life of dicumyl peroxide (bis(α,α-dimethylbenzyl) peroxide) is estimated at DT50 = 142 d, based on (poorly fitting) single first-order kinetics.
Mineralisation reaches a maximum of 12.9 % after 90 days (at 50 µg/L).
Testing on ultimate degradation in sediment is not considered to be required.
Likewise, simulation testing of degradation in soil is not considered to be required, since exposure of soil is expected to be negligible based on the chemical safety assessment.
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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