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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://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
Endpoint summary
Administrative data
Description of key information
Direct Black 168 is a orange powder at 20 °C and 1013 hPa. No melting/boiling reactions were recorded up to 300 °C; vapour pressure can be considered as negligible.
The test item is very water soluble (i.e. 194 g/l) and the partition coefficient log Pow was determined to be lower than -4.
Based on the available information, the substance resulted to be non auto-flammable/flammable/explosive/oxidising agent.
Additional information
APPEARANCE AND PHYSICOCHEMICAL STATE
Direct Black 168 is a black organic powder at 20 °C and 1013 hPa. It is characterized particles having a diameter between 128 and 1.5 μm; in detail, particles with a diameter below 4 μm are ca 2 %. No melting/boiling reactions were recorded up to 300 °C, using the capillary method in liquid bath.
Based on physicochemical properties, the vapour pressure is expected to be negligible.
SOLUBILITY AND PARTITION COEFFICIENT
The partition coefficient was first evaluated by using the shake flask method, according to the OECD Guideline 107. The value of LogPow obtained shows that the expected Pow lies outside the range of flask shaking method and it was suggested that it should be estimated by the calculation method. The calculation was performed by the fragment method and the Log Pow was calculated as the sum of its corresponding fragment values (fi), multiplied by the frequency of their occurence (ai), plus the sum of correction terms for intramolecular interactions. The value calculated was -8.44.
The water solubility was assessed by the shake flask method. The substance resulted to be very soluble in water, i.e. 194 g/l at 20 °C and pH 4.8.
PHYSICAL HAZARDS
The relative self-ignition temperature for Direct Black 168 is 195 °C.
The substance does not ignite and not propagate combustion neither by burning with flame or by smouldering along 200 mm of the powder train within the 4 -minute test period.
The substance is incapable of reacting exothermically with combustible materials and it is not thermally or shock sensitive nor is sensitive to friction.
The substance does not meet the criteria to be considered as flammable/explosive/oxidising.
Furthermore, the thermal stability and air stability of the substance were investigated using DTA method; the sample shows neither without nor with air any peak between room temperature and 150 °C.
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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