Registration Dossier
Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 207-586-9 | CAS number: 482-89-3
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.
