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Azocolourants and Azodyes

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CAS no.: -

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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
  • REACH Annex XVII. Substances for which certain uses are Restricted under REACH at EU level.
Construction Products Regulation
  • Construction Product Regulation - Annex I (3) - Hazardous Substances
    EU. Hazardous Substances for Purposes of Annex I (3) (Requirements for Construction Works), Regulation 305/2011/EU on Marketing of Construction Products, amended by Regulation 574/2014/EU, 28 May 2014

    This list contains a non-exhaustive inventory of substances taken from: (1) Table 3 of Annex VI to CLP; (2) the Candidate List of SVHCs; (3) Annex XIV of REACH (Authorisation List); (4) Annex XVII of REACH (Restrictions List); (5) F-gases subject to emission limits/reporting per Regulation 517/2014/EU; and (6) volatile organic compounds (VOCs) listed in the Ambient Air Directive 2008/50/EC. The basis of the list is Annex I(3) of the Construction Products Regulation 305/2011/EC, which stipulates that construction works must not have a high impact on human health or the environment as a result of: giving off toxic gas; emissions of dangerous substances, volatile organic compounds (VOC), greenhouse gases or dangerous particles into indoor or outdoor air; release of dangerous substances into drinking water, ground water, marine waters, surface waters or soil.

General Product Safety Directive
  • General Product Safety Directive - Hazardous Substances
    EU. Hazardous Substances for Purposes of General Product Safety Directive (2001/95/EC), 15 January 2002, amended by Reg 596/2009/EC, 18 July 2009

    This list contains a non-exhaustive inventory of substances that fall within the European Union's hazardous substance definitions, as provided on: (1) Table 3 of Annex VI to the CLP Regulation 1272/2008/EC; (2) Annex III of Directive 2000/54/EC (Biological Agents); Candidate List of SVHCs; and REACH Annexes XIV and XVII (Authorisation and Restriction lists). They can be considered hazardous for purposes of the General Product Safety Directive 2001/95/EC.

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Substance names and other identifiers

Regulatory process names
Azocolourants and Azodyes
Restriction list, Construction Product Regulation - Annex I (3) - Hazardous Substances, General Product Safety Directive - Hazardous Substances, Other
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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
A mixture of: disodium (6-(4-anisidino)-3-sulfonato-2-(3,5-dinitro-2-oxidophenylazo)-1-naphtholato)(1-(5-chloro-2-oxidophenylazo)-2-naphtholato)chromate(1-); trisodium bis(6-(4-anisidino)-3-sulfonato-2-(3,5-dinitro-2-oxidophenylazo)-1-naphtholato)chromate(1-) 405-665-4 118685-33-9 Official source
4-o-tolylazo-o-toluidine 202-591-2 97-56-3 Expert judgement
Disodium 4,4'-bis(2-hydroxynaphthalen-1-ylazo)biphenyl-2,6'-disulphonate 233-439-3 10169-02-5 Expert judgement
Disodium 4-hydroxy-3-[[4'-[(2-hydroxynaphthyl)azo]-2,2'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate 223-040-2 3701-40-4 Expert judgement
Disodium 3-[[2,2'-dimethyl-4'-[[4-[[(p-tolyl)sulphonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate 228-779-4 6358-57-2 Expert judgement
Trisodium 5-amino-4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate 229-151-2 6420-09-3 Expert judgement
Trisodium 5-amino-3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate 229-152-8 6420-22-0 Expert judgement
Disodium 4-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4'-[(2-hydroxy-1-naphthyl)azo][1,1'-biphenyl]-2,2'-disulphonate 229-294-0 6470-20-8 Expert judgement
Tetrasodium 4,4'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-aminonaphthalene-2,7-disulphonate] 229-468-6 6548-29-4 Expert judgement
Tetrasodium 2,2'-[[4,4'-bis[[1-hydroxy-6-[(4-methoxyphenyl)amino]-3-sulphonato-2-naphthyl]azo][1,1'-biphenyl]-3,3'-diyl]bis(oxy)]diacetate 229-683-5 6655-95-4 Expert judgement
Tetrasodium 4,4'-[(2,2'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-hydroxynaphthalene-2,7-disulphonate 229-831-9 6771-84-2 Expert judgement
Tetrasodium [μ-[[4,4'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[3-hydroxynaphthalene-2,7-disulphonato]](8-)]]dicuprate(4-) 235-414-2 12222-00-3 Expert judgement
Disodium hydrogen 5-amino-3-[[4'-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate 269-321-3 68214-82-4 Expert judgement
Trisodium 4-amino-3-[[4'-[(2,4-dihydroxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate 269-759-5 68318-35-4 Expert judgement
Disodium 4-amino-5-hydroxy-6-[[4'-[(4-hydroxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonate 270-025-1 68400-36-2 Expert judgement
Sodium 3-benzamido-4-hydroxy-5-[[1-[[4'-[[2-[[2-hydroxy-5-(methylsulphonyl)phenyl]azo]-1,3-dioxobutyl]amino]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]carbamoyl]-2-oxopropyl]azo]benzenesulphonate 274-428-3 70210-32-1 Expert judgement
Dilithium 5-[[4'-[[2,6-diamino-3-[(4-sulphonatophenyl)azo]phenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]salicylate 274-709-0 70632-09-6 Expert judgement
Disodium 5-[[4'-[(2-amino-8-hydroxy-6-sulphonato-2-naphthyl)azo]-2,2'-dichloro[1,1'-biphenyl]-4-yl]azo]salicylate 275-271-3 71215-83-3 Expert judgement
Trisodium 2-[[2-amino-5-hydroxy-6-[[4'-[(2-hydroxy-6-sulphonato-1-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-7-sulphonato-1-naphthyl]azo]-5-nitrobenzoate 275-635-1 71566-41-1 Expert judgement
Tetrasodium [μ-[7-[[3,3'-dihydroxy-4'-[(4-hydroxy-2-sulphobenzo[a]phenazin-3-yl)azo][1,1'-biphenyl]-4-yl]azo]-8-hydroxynaphthalene-1,3,6-trisulphonato(8-)]]dicuprate(4-) 276-136-1 71873-63-7 Expert judgement
[1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4-[[5-[[5-(aminosulfonyl)-2-hydroxyphenyl]azo]-1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo]-4'-[[1-[[(3-carboxy-4-hydroxyphenyl)amino]carbonyl]-2-oxopropyl]azo]-, tetrasodium salt 276-539-2 72252-59-6 Expert judgement
2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4-[2-[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-2-sulfophenyl]ethenyl]-3-sulfophenyl]azo]-4-hydroxy-, compd. with 2,2',2''-nitrilotris[ethanol] (1:5) 278-220-3 75476-99-2 Expert judgement
7-hydroxy-8-[[4'-[(4-hydroxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-1,3-disulphonic acid 204-182-4 117-32-8 Expert judgement
7-hydroxy-8-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]naphthalene-1,3-disulphonic acid 204-184-5 117-33-9 Expert judgement
2,7-Naphthalenedisulfonic acid, 5-[(2-amino-4-hydroxyphenyl)azo]-3-[[4'-[[7-[(2-amino-4-hydroxyphenyl)azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxy-, sodium salt 260-603-1 57167-02-9 Expert judgement
Trisodium 5-amino-3-[[4'-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate 266-251-5 66214-51-5 Expert judgement
Disodium [5-[[4'-[[2,6-dihydroxy-3-[(2-hydroxy-5-sulphophenyl)azo]phenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]salicylato(4-)]cuprate(2-) 266-264-6 66225-65-8 Expert judgement
Trisodium [μ-[4-[[4'-[(6-amino-1-hydroxy-3-sulpho-2-naphthyl)azo]-3,3'-dihydroxy[1,1'-biphenyl]-4-yl]azo]-3-hydroxynaphthalene-2,7-disulphonato(7-)]]dicuprate(3-) 266-354-5 66418-17-5 Expert judgement
Tetrasodium [μ-[3-[[3,3'-dihydroxy-4'-[(2-hydroxy-3,6-disulpho-1-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonato(8-)]]dicuprate(4-) 266-355-0 66418-18-6 Expert judgement
Disodium 5-[[4'-[(2,4-diamino-5-sulphonatophenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]salicylate 267-622-4 67893-48-5 Expert judgement
Trilithium 5-amino-4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate 267-794-0 67923-89-1 Expert judgement
Tetrasodium 5-amino-4-hydroxy-3-[[4'-[(2-hydroxy-3,6-disulphonato-1-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate 268-421-4 68084-09-3 Expert judgement
Trisodium 4-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-3-hydroxynaphthalene-2,7-disulphonate 268-432-4 68084-22-0 Expert judgement
Tetrasodium 4-amino-6-[[4'-[(1,8-dihydroxy-3,6-disulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-5-hydroxynaphthalene-1,3-disulphonate 268-434-5 68084-23-1 Expert judgement
Trisodium [μ-[3-[[4'-[(2,8-dihydroxy-6-sulpho-1-naphthyl)azo]-3,3'-dihydroxy[1,1'-biphenyl]-4-yl]azo]-4,5-dihydroxynaphthalene-2,7-disulphonato(7-)]]dicuprate(3-) 268-788-0 68140-31-8 Expert judgement
2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-((4'-((1-hydroxy-4-sulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-, trisodium salt 613-766-1 6527-65-7 Expert judgement
1,3-Naphthalenedisulfonic acid, 4-amino-6-((4'-((8-amino-1-hydroxy-3,6-disulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-5-hydroxy-, tetrasodium salt 606-784-6 2150-53-0 Expert judgement
4-amino-3-[[4'-[(2,4-diaminophenyl)azo]-2,2'-disulpho[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonic acid, sodium salt 280-241-8 83221-63-0 Expert judgement
4-amino-3-[[4'-[(8-amino-1-hydroxy-3,6-disulpho-2-naphthyl)azo]-2,2'-disulpho[1,1'-biphenyl]-4-yl]azo]-5-hydroxynaphthalene-2,7-disulphonic acid, sodium salt 280-242-3 83221-64-1 Expert judgement
Trisodium 4-amino-3-[[4'-[(4-amino-2-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulphonatophenyl)azo]naphthalene-2,7-disulphonate 281-547-4 83968-66-5 Expert judgement
Tetrasodium 4,4'-bis[(1-hydroxy-4-sulphonato-2-naphthyl)azo][1,1'-biphenyl]-2,2'-disulphonate 283-852-8 84753-06-0 Expert judgement
4-amino-3-[[4'-[(8-amino-1-hydroxy-3,6-disulpho-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulphophenyl)azo]naphthalene-2,7-disulphonic acid, sodium salt 287-366-7 85480-84-8 Expert judgement
3-[[4'-[(6-amino-1-hydroxy-3-sulpho-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonic acid, sodium salt 288-523-2 85749-99-1 Expert judgement
4-amino-5-hydroxy-3-[[4'-[(2-hydroxy-1-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-6-[(4-sulphophenyl)azo]naphthalene-2,7-disulphonic acid, sodium salt 288-530-0 85750-05-6 Expert judgement
4-amino-5-hydroxy-3-[[4'-[(4-hydroxy-m-tolyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonic acid, sodium salt 288-531-6 85750-06-7 Expert judgement
4-amino-3-[[4'-[(4-amino-2-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-[(4-sulphophenyl)azo]naphthalene-2,7-disulphonic acid, sodium salt 288-532-1 85750-07-8 Expert judgement
Disodium 4-amino-3-[[4'-[(2-amino-4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate 288-760-1 85895-85-8 Expert judgement
Disodium 3,3'-[(2,2'-dimethyl[1,1'-biphenyl]-4,4'-diyl)bis[azo(4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-4,1-diyl)]]bis[4-chlorobenzenesulphonate] 289-549-7 89923-60-4 Expert judgement
Disodium 4-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo]-2,2'-dimethyl[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate 299-885-6 93918-04-8 Expert judgement
5-amino-3-[[4'-[(dihydroxyphenyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonic acid, sodium salt 299-909-5 93918-27-5 Expert judgement
5-amino-3-[[4'-[(6-amino-1-hydroxy-3-sulpho-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonic acid, sodium salt 303-428-9 94199-55-0 Expert judgement
2,2'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[N-(4-chlorophenyl)-3-oxobutyramide] 304-380-1 94249-03-3 Expert judgement
1-Naphthalenesulfonic acid, 4-hydroxy-3-((4'-((1-hydroxy-5-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-bip henyl)-4-yl)azo)-, disodium salt 613-499-0 6420-06-0 Expert judgement
Benzoic acid, 2-((2-amino-5-hydroxy-6-((4'-((2-hydroxy-6-sulfo-1-naphthalenyl)azo)-3,3'-dimethoxy-(1,1'-biphenyl)-4-yl)azo)-7-sulfo-1-naphthalenyl)azo)-5-nitro-, disodium salt - 101200-51-5 Expert judgement
Glycine, N-acetyl-, compd. with 2,2'-(1,2-ethenediyl)bis[5-benzofurancarboximidamide] (2:1) - 108321-12-6 Expert judgement
2,7-Naphthalenedisulfonic acid, 3,3'-((3,3'-dichloro-4,4'-biphenylylene)bis(azo))bis(5-amino-4-hydroxy-, tetrasodium salt - 47897-65-4 Expert judgement
2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4'-[(8-amino-1-hydroxy-5-sulfo-2-naphthalenyl)azo]-3, 3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-4-hydroxy-, trisodium salt - 6420-25-3 Expert judgement
1,3,6-Naphthalenetrisulfonic acid, 8-hydroxy-7-((4'-((2-hydroxy-1-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-, trilithium salt - 65150-87-0 Expert judgement
1,6-Naphthalenedisulfonic acid, 4-amino-3-((4'-((1-amino-4-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-, trisodium salt - 65152-14-9 Expert judgement
1,7-Naphthalenedisulfonic acid, 4-amino-3-((4'-((1-amino-4-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-, trisodium salt - 65152-15-0 Expert judgement
1,3-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-6-((4'-((2-hydroxy-3,6-disulfo-1-naphthalenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-, tetrasodium salt - 68084-21-9 Expert judgement
Benzoic acid, 5-((4'-((6-amino-5-(1H-benzotriazol-5-ylazo)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-2-hydroxy-4-methyl-, disodium salt - 70210-28-5 Expert judgement
2,7-Naphthalenedisulfonic acid, 3-((3,3'-dimethyl-4'-((4-((phenylsulfonyl)oxy)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)-4-hydroxy-, disodium salt - 71701-30-9 Expert judgement
2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4'-((2-hydroxy-4-((2-methylphenyl)amino)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)-6-(phenylazo)- - 72379-45-4 Expert judgement
2,7-Naphthalenedisulfonic acid, 6-((4-amino-2-hydroxyphenyl)azo)-3-((4'-((7-((4-amino-2-hydroxyphenyl)azo)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-4-hydroxy-, trisodium salt - 72845-86-4 Expert judgement
2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-((4'-((1-hydroxy-4-sulfo-2-naphthalenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-, monolithium disodium salt - 75673-18-6 Expert judgement
2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-((4'-((1-hydroxy-4-sulfo-2-naphthalenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-, dilithium monosodium salt - 75673-19-7 Expert judgement