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EC number: 233-162-8 | CAS number: 10049-04-4
- 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
As demonstrated by different studies in this section, chlorine dioxide reacts with a number of inorganic and organic substances like iron, sulphuric compounds (organic as well as inorganic), phenolic compounds and humus acids. Surface waters, ground water, waste water etc. are unique in terms of their composition and therefore the combination of substances that can react with and degrade chlorine dioxide. The laboratory study has consequently to be seen as an example of how chlorine dioxide may decay in the aqueous environment.
Studies from Ottaviani et al. (2002) and Belluati (2007) demonstrated that Chlorine dioxide is completely degradated within 37 and 18 min respectively.
No decay of ClO2 could be detected using tap water during the evaluated time frame. The reason for the slow decay in tap water is the low amount of substances that can be oxidized. Still a low amount of ClO2 in the water leaving the water treatment plant is desired in order to prevent recontamination of the water and to avoid bio-fouling of the water pipes. The study from Van der Togt and van Ginkel (2005), on chlorate degradation, concluded that while chlorate is degradated to chloride, no chlorite is observed. Thus, chlorite is completely degradated within few minutes.
Degradation rates
Chlorine dioxide is completely degradated within seconds to minutes under the conditions of use. It is considered that no chlorine dioxide reaches the environment. Chlorine dioxide is entirely degraded to chloride and chlorate ions, via the transient intermediate of chlorite which has a really short half-life (few seconds).
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