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REACH

Disodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(phenylazo)naphthalene-2-sulphonate]

EC number: 222-838-8 | CAS number: 3626-36-6

Life Cycle description
Uses advised against

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The primary source of possible environmental pollution of Direct Orange 26 is represented by industrial waste water, while secondary releases can occur during washing of dyed substrates, thus the fate and pathways of Direct Orange 26 in surface water are of primary concern.

In the aquatic environment hydrolysis is not expected to be an important elimination process for Direct Orange 26, based on avalialbe data on similar substance which undergoes slow hydrolysis, with a calculated half-life greater than one year at 25 °C.

Phototransformation is not considered a relevant process for the substance, although phototransformation can be enhanced using oxidants.

Direct Orange 26 is expected to be a substance with a low potential for adsorption based on the partition coefficient Kow.

Under standard test conditions no ready biodegradation was observed. According to the available studies, no biodegradation of Direct Orange 26 were expected.

BCF has not been tested because Direct Orange 26 and similar substances have a low estimated potential for bioaccumulation and/or a low potential to cross biological membranes.

Direct and indirect exposure of sediment and soil is unlikely, since environmental exposure only occurs through industrial waste water.

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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