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Diss Factsheets
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EC number: 274-490-1 | CAS number: 70236-60-1
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Inherent primary biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
Additional information
The biodegradation of Acid Brown 282 (ABr282) was evaluated following the Zahn-Wellens/EMPA test procedures, adopted as OECD Guideline 302 B for determining inherent biodegradability. In both the reliable available studies, it was recorded an elimination of ABr282 higher than 20 %, but less than 70 % degradation after 28 days of contact time: 24 % in the Archroma study (Archroma Germany GmbH, 2005) and 32 % in the Huntsman study (Huntsman Textile Effects (Germany), 1995). Therefore ABr282 can be termed as inherent, primary biodegradable under the conditions of the OECD guideline no. 302 B.
A third Zahn/Wellens test is available (Huntsman Textile Effects (Germany), 1989), but it has been disregarded on the basis of the lot composition tested: the dye concentration was just of 26 % and the remaining components are all ready biodegradable. This may explains why a complete degradation was observed after 16 days.
Inherent biodegradability data may be used for extrapolation to a rate constant in models for estimation of the elimination of chemicals in the STP, nevertheless, this extrapolation is only allowed if the pass level of 70 % degradation in the Zahn-Wellens/EMPA has been reached. Therefore in this case the results cannot be used for the estimation of the substance elimination in STP.
The substance is not expected to be ready biodegradable. The QSAR based screening criterion for identifying substances for persistency (P and vP) confirmed that the substance is expected to be persistent and this estimated behaviour is supported by the results obtained from the BOD5:COD studies available.
In conclusion, ABr282 undergoes a primary degradation in the first days of the test, when it reaches a percentage of degradation that remains similar for the following days, up to the 28th day. It is clear that ABr282 is not ready biodegradable, nevertheless the test results do not provide sufficient information to clearly confirm the substance to be persistent.
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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