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Diss Factsheets
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EC number: 297-025-4 | CAS number: 93281-13-1
- 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
![](https://poisoncentres.echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_environmental-fate-and-pathways.png)
Endpoint summary
Administrative data
Description of key information
The primary source of possible substance environmental release is represented by industrial waste waters; the substance is not expected to be directly released to soil and air compartment can be considered as not relevant.
Direct Black 168 is hydrolytically stable and it is not readily biodegradable.
The substance is likely to possess a low affinity for soil / sediment. In addition, it is expected to be characterized by a low potential for bioaccumulation and/or a low potential to cross biological membranes.
Additional information
The test substance is a solid powder under environmental conditions. Based on the thermal behaviour, the substance does not melt, either boil up to high temperature. Evaporation is not a relevant characteristic of Direct Black 168, thus the possibility to be dispersed in air, the amount and the persistence in this compartment are related to the granulometry, which confirms the non-relevance of this compartment.
Direct Black 168 is highly water soluble and, based on the chemical characteristics, it is expected to be stable under typical environmental pH conditions.
The primary source of possible substance environmental release is represented by industrial waste waters, thus the fate and pathways of the substance in surface water is of primary concern.
Considering the intended use in aqueous-based treatments, Direct Black 168 is not expected to be directly released to air, either soil. As abovementioned, the physicochemical properties of the item confirm that the air compartment can be considered as not relevant and that the soil compartment in expected to be non concerning Direct Black 168.
Based on the preliminary test results, Direct Black 168 is hydrolytically stable: hydrolysis rate was found to be lower than 10 % at pH 7 and 50 °C, after 5 days; thus, a half-life of about one year at 25 °C and pH 7 was estimated.
Although it was not investigated, phototransformation in air/water/soil is not expected to be an important mechanisms for transformation/removal of Direct Black 168.
Direct Black 168 is not readily biodegradable. The substance did not show any potential of microorganisms impact neither in the specific test, either in the biodegradation experiments. Thus, it is deemed to not negatively impact the STP systems.
The substance is likely to possess a low affinity for soil / sediment. The adsorption potential of the Direct Black 168 on soil and on sewage sludge was evaluated on the basis of the available information on the analogous Similar Substance 01 and the study outcomes confirmed the mentioned expectation.
There is no empirical bioaccumulation data available for the substance under investigation, nevertheless on the basis of the negative log Pow, it is expected to be characterized by a low potential for bioaccumulation and/or a low potential to cross biological membranes. Due to the molecular mass greater than 700 and due to the steric hindrance, the possible passage of gill membranes or cell membranes of respiratory organs is expected to be negligible
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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