Substance Information

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Substance Infocard


Disodium 8,8'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(7-hydroxynaphthalene-1-sulphonate)

EC / List no.: 218-959-0

CAS no.: 2302-97-8

Mol. Formula: C32H20N4Na2O8S2

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Key datasets


Regulatory context

Here you can find all of the regulations and regulatory lists in which this substance appears, according to the data available to ECHA. This substance has been found in the following regulatory activities (directly, or inheriting the regulatory context of a parent substance):

REACH - Registration, Evaluation, Authorisation and Restriction of Chemicals Regulation
  • Substances predicted as likely to meet criteria for category 1A or 1B carcinogenicity, mutagenicity, or reproductive toxicity, or with dispersive or diffuse use(s) where predicted likely to meet any classification criterion for health or environmental hazards, or where there is a nanoform soluble in biological and environmental media.
  • Substances indicated, in 2009, as being intended to be registered by at least one company in the EEA.
PIC - Prior Informed Consent Regulation
Previous Legislations
  • Substances listed in the EINECS, ELINCS, or NLP inventories.
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Substance names and other identifiers

Regulatory process names
1-Naphthalenesulfonic acid, 8,8'-((1,1'-biphenyl)-4,4'-diylbis(azo))bis(7-hydroxy-, disodium salt
Disodium 8,8'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(7-hydroxynaphthalene-1-sulphonate)
EC Inventory, PIC, Other
disodium 8,8'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(7-hydroxynaphthalene-1-sulphonate)
PIC, Pre-Registration process, Other
IUPAC names
disodium 7-hydroxy-8-[(E)-2-{4'-[(E)-2-(2-hydroxy-8-sulfonaphthalen-1-yl)diazen-1-yl]-[1,1'-biphenyl]-4-yl}diazen-1-yl]naphthalene-1-sulfonate
Other identifiers
EC Inventory, PIC, Pre-Registration process, Other
CAS number
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Group parents

This substance has been identified as member of the following groups of substances:

Results list is empty
Name EC / List no. CAS no. Association
[No public or meaningful name is available] - - Official source
Benzidine, its salts and benzidine derivatives - - Expert judgement (ECHA)
[No public or meaningful name is available] - - Expert judgement (ECHA)