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EC number: 407-950-9 | CAS number: 895-85-2 INTEROX-PMBP-70W; INTEROX-PMPB-70W
- 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
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 64 µg/L
- Assessment factor:
- 50
- PNEC freshwater (intermittent releases):
- 0.42 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 6.4 µg/L
- Assessment factor:
- 500
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 497 mg/L
- Assessment factor:
- 1
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.61 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.061 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.084 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
In a stability test in water (van Dam, 2014) at test conditions (pH 8, 20 °C) it was observed that bis(4-methylbenzoyl)peroxide is hydrolytically instable with a half-life of 2.3h. A full hydrolysis study is planned to investigate the speed of hydrolysis at different environmentally relevant pHs and the formation of the main degradation product p-toluic acid (CAS no. 99 -94 -5).
It is technically difficult to obtain test concentrations of the parent substance close to the water solubility limit and to remove the non-dissolved fraction and with such fast hydrolysis, the low water solubility of 43 µg/L and the technical difficulties it should be concluded that tests should be performed with degradation products instead and PNEC values should be determined for this substance.
Conclusion on classification
Bis(4 -methylbenzoyl)peroxide has a harmonized classification:
Directive (67/548/EEC)
R50/53
Regulation (EU) No 286/2011
Aquatic acute 1; H400
Aquatic chronic 1: H410
M-factor for both is 1
UN GHS
Aquatic acute 1; H400
Aquatic chronic 1: H410
M-factor for both is 1
Bis(4 -methylbenzoyl)peroxide is not very soluble in water (43 µg/L) and has a high log Kow of 4.7.
From a ready biodegradability study it can be concluded that the substance is readily biodegradable, besides this it shows very fast hydrolysis. The main degradation product is p-toluic acid (CAS 99 -94 -5) which is also readily biodegradable and has a log Kow of 2.44. This substance shows acute toxicity to invertebrates (most sensitive) with an EC50 of 42 mg/L and a chronic toxicity NOEC of 3.2 mg/L (OECD SIDS, 2008). This substance is therefore not classified.
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