Substance Information

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REACH Registration data can be found in the new ECHA CHEM database. The old ‘Registered substance factsheets’ will be available on this web site during the transition period but have not been updated since 19 May 2023. More


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[No public or meaningful name is available]

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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):

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Group members

This entry / group of substance has the following member substances:

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Name EC / List no. CAS no. Association
Disodium 8,8'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(7-hydroxynaphthalene-1-sulphonate) 218-959-0 2302-97-8 Expert judgement (ECHA)
3,3′,5,5′-Tetramethylbenzidine dihydrochloride hydrate 688-511-0 207738-08-7 Expert judgement (ECHA)
[[1,1'-biphenyl]-4,4'-diyl]diammonium sulphate 208-520-1 531-86-2 Expert judgement (ECHA)
N,N'-diphenylbenzidine 208-521-7 531-91-9 Expert judgement (ECHA)
[1,1'-Biphenyl]-4,4'-diamine, reaction products with 4-(6-methyl-2-benzothiazolyl)benzenamine, 4-(6-methyl[2,6'-bibenzothiazol]-2'-yl)benzenamine and sodium sulfide 290-814-4 90268-15-8 Expert judgement (ECHA)
2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, coupled with 4-amino-5-hydroxy-2-naphthalenesulfonic acid, diazotized 4-aminobenzenesulfonic acid and diazotized [1,1'-biphenyl]-4,4'-diamine 291-628-6 90431-98-4 Expert judgement (ECHA)
N,N,N',N'-tetraphenyl[1,1'-biphenyl]-4,4'-diamine 239-599-0 15546-43-7 Expert judgement (ECHA)
3,3'-dimethoxybiphenyl-4,4'-ylenediammonium dichloride 243-737-5 20325-40-0 Expert judgement (ECHA)
Benzidine sulphate 244-236-4 21136-70-9 Expert judgement (ECHA)
Benzidine acetate 252-984-8 36341-27-2 Expert judgement (ECHA)
3,3',5,5'-tetramethylbenzidine 259-364-6 54827-17-7 Expert judgement (ECHA)
3,3',5,5'-tetramethyl[1,1'-biphenyl]-4,4'-diamine dihydrochloride 264-769-6 64285-73-0 Expert judgement (ECHA)
3,3'-dichlorobenzidine dihydrogen bis(sulphate) 265-293-1 64969-34-2 Expert judgement (ECHA)
3,3'-dichlorobenzidine sulphate 277-822-3 74332-73-3 Expert judgement (ECHA)
4,4'-[[1,1'-biphenyl]-4,4'-diyldiazo]bis[4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic] acid, sodium salt 303-425-2 94199-52-7 Expert judgement (ECHA)
2,2'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[N-(4-chlorophenyl)-3-oxobutyramide] 304-380-1 94249-03-3 Expert judgement (ECHA)
Benzidine 202-199-1 92-87-5 Expert judgement (ECHA)
3,3'-dimethoxybenzidine 204-355-4 119-90-4 Expert judgement (ECHA)
4,4'-bi-o-toluidine 204-358-0 119-93-7 Expert judgement (ECHA)
3,3'-dichlorobenzidine 202-109-0 91-94-1 Expert judgement (ECHA)
Biphenyl-3,3',4,4'-tetrayltetraamine 202-110-6 91-95-2 Expert judgement (ECHA)
3,3'-dichlorobenzidine dihydrochloride 210-323-0 612-83-9 Expert judgement (ECHA)
[1,1'-biphenyl]-4,4'-diamine, reaction products with 1-methyl-2,4-dinitrobenzene and sodium sulfide (Na2(Sx))
This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 53025.
215-424-3 1326-43-8 Expert judgement (ECHA)
[1,1'-biphenyl]-4,4'-diamine, reaction products with 4-methyl-1,3-benzenediamine and sulfur
This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 53105.
215-436-9 1326-63-2 Expert judgement (ECHA)
Acetamide, N-(2-methylphenyl)-, reaction products with [1,1'-biphenyl]-4,4'-diamine and sulfur, leuco derivatives
This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 53150.
215-439-5 1326-73-4 Expert judgement (ECHA)
[1,1'-biphenyl]-4,4'-diamine, reaction products with 4-(6-methyl-2-benzothiazolyl)benzenamine and sulfur
This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 53160.
215-440-0 1326-75-6 Expert judgement (ECHA)
3,3-Diaminobenzidine tetrahydrochloride 685-525-9 868272-85-9 Expert judgement (ECHA)
Benzidine dihydrochloride 208-519-6 531-85-1 Expert judgement (ECHA)