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Survey of azo-colorants in Denmark

 

 

Appendix 6. Molecular structure of selected azo pigments
CI-name

CI- no.

CAS-no.

Structure

Name
Pigment Brown 23

20060

57972-00-6

N,N’-(phenyl)-bis-(4-(phenyl)azo)-3-hydroxy-2-naphthalenecarboxamide
Pigment Brown 25

12510

6992-11-6

4-[(2,5-dichlorophenyl)-azo]-N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-hydroxy-2-naphthalenecarboxamide
Pigment Orange 5

12075

3468-63-1

1- (2,4-dinitrophenyl)-azo -2-naphthalenol,
Pigment Orange 13

21110

3520-72-7

4,4'- (3,3'-dichloro 1,1'-biphenyl -4,4'-diyl)bis(azo) bis 2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one
Pigment Orange 31

20050

12286-58-7

N,N’-(3,3-dichloro-1,1’-biphenyl-4,4’-diyl)-bis(4-(2-chlorophenyl)azo)-3-hydroxy-2-naphthalenecarboxamide
Pigment Orange 34

21115

15793-73-4

4,4'- (3,3'-dichloro 1,1'-biphenyl -4,4'-diyl)bis(azo) bis 2,4-dihydro-5-methyl-2-(4-methylphenyl)- 3H-pyrazol-3-one
Pigment Orange 36

11780

12236-62-3

2-((4-chloro-2-nitrophenyl)azo)-N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxo- butanamide
Pigment Orange 38

12367

12236-64-5

N-(4-(acetylamino)phenyl -4-((5-(aminocarbonyl)-2-chlorophenyl)azo)-3-hydroxy-2-naphthalenecarboxamide
Pigment Red 1

12070

6410-10-2

1-((4-nitrophenyl)azo)-2-naphthalenol
Pigment Red 3

12120

2425-85-6

1-((4-methyl-2-nitrophenyl)azo)-2-naphthalenol
Pigment Red 5

12490

6410-41-9

N-(5-chloro-2,4-dimethoxyphenyl)-4-[[5-[(diethylamino)sulfonyl] -2-methoxyphenyl] azo] -3-hydroxy-2-naphthalenecarboxamide
Pigment Red 8

12335

6410-30-6

N-(4-chlorophenyl)-3-hydroxy-4-((2-methyl-5-nitrophenyl)azo)-2-naphthalenecarboxamide
Pigment Red 9

12460

6410-38-4

4-((2,5-dichlorophenyl)-azo) -3-hydroxy-N-(2-methoxyphenyl)- 2-naphthalenecarboxamide
Pigment Red 12

12385

6410-32-8

3-hydroxy-4-[(2-methyl-4-nitrophenyl)azo]-N-(2-methylphenyl)-2-naphthalenecarboxamide
Pigment Red 22

12315

6448-95-9

3-hydroxy-4-[(2-methyl-5-nitrophenyl)azo]-N-phenyl-2-naphthalenecarboxamide
Pigment Red 48

15865

16013-44-8

4-[(5-chloro-4-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalene carboxylic acid
Pigment Red 49

15630

1248-18-6

2-[(2-hydroxy-1-naphthalenyl)azo]-1-naphthalenesulfonic acid, monosodium salt
Pigment Red 52

15860

5858-82-2

4-[(4-chloro-5-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid, disodium salt
Pigment Red 53

15585

2092-56-0

5-chloro-2-[(2-hydroxy-1-naphthalenyl)azo]-4-methyl-benzenesulfonic acid, monosodium salt
Pigment Red 57

15850

5858-81-1

3-hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2-naphthalenecarboxylic acid, disodium salt
Pigment Red 57:1

15850:1

5281-04-9

3-hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2-naphthalenecarboxylic acid, calcium salt
Pigment Red 68

15525

5850-80-6

3-chloro-4-benzoic-6-((2-hydroxynaphthalenyl)azo)-benzenesulfonic acid calcium sodium salt
Pigment Red 112

12370

6535-46-2

3-hydroxy-N-(2-methylphenyl)-4- (2,4,5-trichlorophenyl)azo -2-naphthalenecarboxamide
Pigment Red 144

20735

5280-78-4

N,N’-(2-chloro-1,4-phenylene)-bis[4-(2,5-dichlorophenyl)-azo]-3-hydroxy-2-naphthalene carboxamide
Pigment Red 146

12485

5280-68-2

N-(4-chloro-2,5-dimethoxyphenyl)-3-hydroxy-4-[[2-methoxy-5-[(phenylamino)carbonyl] phenyl] azo]-2-naphthalenecarboxamide
Pigment Red 166

20730

12225-04-6

Pigment Red 170

12475

2786-76-7

4-[[4-(aminocarbonyl)-phenyl]-azo]-N-(2-ethoxyphenyl)-3-hydroxy- 2-naphthalenecarboxamide
Pigment Red 175

12513

6985-92-8

2-[[3-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]-carbonyl]-2-hydroxy-1-naphthalenyl]-azo]-benzoic acid, methyl ester
Pigment Red 176

12515

12225-06-8

N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-hydroxy-4-[[2-methoxy-5-[(phenylamino)carbonyl]-phenyl]-azo]-2-naphthalenecarboxamide
Pigment Red 187

12486

59487-23-9

4-[[5-[[[4-(aminocarbonyl)-phenyl]-amino]-carbonyl]-2-methoxyphenyl]-azo]-N-(5-chloro-2,4-dimethoxyphenyl)-3-hydroxy- 2-naphthalenecarboxamide
Pigment Violet 32

12517

12225-08-0

N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-4-[[2,5-dimethoxy-4-[((methylamino)-sulfonyl]-phenyl]-azo]-3-hydroxy-2-naphthalenecarboxamide
Pigment Yellow 1

11680

2512-29-0

2- [(4-methyl-2-nitrophenyl)-azo]-3-oxo-N-phenyl- butanamide
Pigment Yellow 3

11710

6486-23-3

2-[(4-chloro-2-nitrophenyl)azo] -N-(2-chlorophenyl)-3-oxo-butanamide
Pigment Yellow 10

12710

6407-75-6

4-[(2,5-dichlorophenyl)-azo]-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one
Pigment Yellow 12

21090

6358-85-6

2,2'-[(3,3'-dichloro-[1,1'-biphenyl]-4,4'-diyl)-bis(azo)]-bis 3-oxo-N-phenyl-butanamide
Pigment Yellow 13

21100

5102-83-0

2,2'-[(3,3'-dichloro-[1,1'-biphenyl]-4,4'-diyl)-bis(azo)]- bis N-(2,4-dimethylphenyl)-3-oxo-butanamide
Pigment Yellow 14

21095

5468-75-7

2,2'-[(3,3'-dichloro-[1,1'-biphenyl]-4,4'-diyl)-bis(azo)]-bis N-(2-methylphenyl)-3-oxo-butanamide
Pigment Yellow 16

20040

5979-28-2

N,N’-(3,3’-dimethyl-[1,1’-diphenyl]-4,4’-diyl)-bis-[2-[2,4-dichlorophenyl)-azo]-3-oxo-butanamide
Pigment Yellow 17

21105

4531-49-1

2,2'- (3,3'-dichloro 1,1'-biphenyl -4,4'-diyl)bis(azo) bis N-(2-methoxyphenyl)-3-oxo-butanamide
Pigment Yellow 61

13880

12286-65-6

2-[(2-nitro-4-sulfophenyl)-azo]-N-(phenyl)-3-oxobutanamide, calcium salt
Pigment Yellow 62:1

13940:1

12286-66-7

2-[(2-nitro-4-sulfophenyl)-azo]-N-(2-methylphenyl)-3-oxobutanamide, calcium salt
Pigment Yellow 74

11741

6358-31-2

2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxo-butanamide
Pigment Yellow 81

21127

22094-93-5

2,2'-[(2,2',5,5'-tetrachloro-[1,1'-biphenyl]-4,4'-diyl)-bis(azo)] bis-N-(2,4-dimethylphenyl)-3-oxo-butanamide
Pigment Yellow 83

21108

5567-15-7

2,2'-((3,3'-dichloro-(1,1'-bisphenyl)-4,4'-diyl)-bis-(azo)-bis(N-4-chloro-2,5-dimethyloxy-phenyl)-3-oxo-butanamide
Pigment Yellow 93

20710

5580-57-4

3,3'-[(2-chloro-5-methyl-1,4-phenylene)-bis-[imino-(1-acetyl-2-oxo-2,1-ethanediyl)-azo]]-bis-[4-chloro-N-(3-chloro-2-methylphenyl)-benzamide
Pigment Yellow 94

20038

5580-58-5

3,3’-[(2,5-dichloro-1,4-phenylene)-bis-[imino-(1-acetyl-2-oxo-2,1-ethanediyl)-azo]]-bis-[4-chloro-N-(5-chloro-2-methylphenyl)-benzamide]
Pigment Yellow 95

20034

5280-80-8

3,3'-[(2,5-dimethyl-1,4-phenylene)-bis-[imino-(1-acetyl-2-oxo-2,1-ethanediyl)-azo]]-bis-[4-chloro-N-(5-chloro-2-methylphenyl)-benzamide
Pigment Yellow 97

11767

12225-18-2

N-(4-chloro-2,5-dimethoxyphenyl)-2-[[2,5-dimethoxy-4-[(phenylamino)-sulfonyl]-phenyl]-azo]-3-oxo-butanamide
Pigment Yellow 98

11727

32432-45-4

N-(4-chloro-2-methylphenyl)-2-[(4-chloro-2-nitrophenyl)azo]-3-oxo-butanamide
Pigment Yellow 120

11783

29920-31-8

5-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-amino]-carbonyl]-2-oxopropyl]-azo]- 1,3-benzenedicarboxylic acid, dimetyl ester
Pigment Yellow 151

13980

31837-42-0

2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxopropyl]azo]-benzoic acid
Pigment Yellow 152

21111

31775-20-9

2,2''- (3,3'-dichloro-4,4'-biphenylylene)bis(azo) bis- p-acetoacetophenetidide
   

20139-66-6

2,2''- (2,2'-dichloro-4,4'-biphenylylene)bis(azo) bis- p-acetoacetophenetidide
Pigment Yellow 154

11781

68134-22-5

N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxo-2-[[2-(trifluoromethyl)-phenyl]-azo]-butanamide