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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
Additional information
Dicumyl peroxide is an organic solid that is white in colour. It is described as a granular substance or as a free-flowing, crystalline solid.
The melting temperature for dicumyl peroxide ranges from 39 to 40.6 °C.
According to REACH Annex VII, the boiling point does not need to be determined because dicumyl peroxide decomposes before boiling.
The average density of dicumyl peroxide is 1.107 g/mL at 20 °C.
The approximate particle sizes L50, L90, and L10 of dicumyl peroxide are 1700 µm, 900 µm, and 6200 µm, respectively.
Vapour pressure for dicumyl peroxide ranges from less than 0.1 mbar for the temperatures 60–80 °C, to 1.53 mbar at 120 °C. The relevant vapour pressure to be used in the risk assessment is < 0.001 Pa at 25 °C.
The log Pow of dicumyl peroxide is 5.6 at 25 °C based on the HPLC method.
Water solubility is low (0.43 mg/L at 20 °C).
Data on surface tension for dicumyl peroxide does not need to be reported because according to REACH Annex VII 7.6, column 2, as surface activity is not expected based on structure of the substance. Furthermore, water solubility is below 1 mg/L at 20 °C.
According to REACH Annex VII, 7.12, column 2, a study on auto flammability does not need to be conducted as dicumyl peroxide is a solid with a melting point of less than 160 °C.
According to REACH Annex VII, 7.13, column 2, a study on oxidising properties does not need to be conducted, as the substance is an organic peroxide.
The substance has no explosive properties because it is not classified as Organic Peroxide Type B.
The substance is marketed as a solid and is not designed to be placed on the market in organic solvents.
According to REACH Annex XI, 1., a study for determination of the dissociation constant is scientifically unjustified as the substance has no functional groups that are susceptible to dissociation.
According to REACH Annex XI, 2., a study for the determination of the viscosity of dicumyl peroxide is technically not feasible, since the substance is a solid at room temperature.
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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