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EC number: 207-586-9 | CAS number: 482-89-3
- 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
It should be noted that the test substance is not considered as posing a hazard to the aquatic environment. Indigo is a natural dye which is gained from Indigofera tinctoria and Indigofera suffruticosa and is known to be not readily biodegradable. The structurally identical synthetic Indigo as well is a solid under all environmental conditions and is insoluble in water (< 0.05 mg/L) with an n-octanol/water partition coefficient of log Kow = 2.7. It has a low volatility based on a vapour pressure of < 3.5E-5 Pa at 100°C and sublimes at ca. 170°C before melting; thus compartmentalising into air compartment is not expected.
Based on the physico-chemical data of Indigo, it is expected to be found predominantly in soil with an estimated half-life of 75 days (PBT-profiler) – to a low extent in water and not in sediment. It is very efficiently adsorbed in wastewater treatment plants (88% to 97%) as shown in adsorption studies. However, with a log Koc of 2.85 it has a comparably low affinity for soil/sediment.
The measured bioconcentration factor for aquatic bioaccumulation (log BCF) for Indigo is < 4.5 and does not exceed the bioconcentration criteria. Furthermore, there is no indication of bioaccumulation in mammals from kinetic or toxicity studies. Therefore, Indigo is not regarded as bio-accumulative.Indigo was nottoxic in mammalian studies therefore in the event of exposure to environmental organisms, effects due to secondary poisoning can be excluded.
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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