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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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REACH

Reaction products of diazotised 4,4-diaminodiphenylamine-2-sulfonic acid, subsequently coupled with 6-amino-4-hydroxynaphthalene-2-sulfonic acid, further diazotised and coupled with metaphenylendiamine, sodium salts

EC number: 939-382-7 | CAS number: -

Life Cycle description
Uses advised against

Environmental fate & pathways

Hydrolysis

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Administrative data

Link to relevant study record(s)

Description of key information

Hydrolysis is not expected to be an important process that characterize Direct Black 22.

Key value for chemical safety assessment

Half-life for hydrolysis:: 1 yr
at the temperature of:: 25 °C

Additional information

In the aquatic environment hydrolysis is not expected to be an important process that characterize Direct Black 22 (DBk22). Read across proposed with a similar substance showed that less than 10% of the test substance was hydrolysed within 5 days period. The half-life time of hydrolysis can therefore be expected greater than 1 year at 25°C and that substance is relatively stable in the medium term.

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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