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Code of Federal Regulations Title 40. Protection of Environment § 40.721.1660 Benzidine-based chemical substances

Current as of January 02, 2025 | Updated by Findlaw Staff

(a) Chemical substances and significant new uses subject to reporting.

(1) The benzidine-based chemical substances listed in Table 1 and Table 2 of this section are subject to reporting under this section for the significant new uses described in paragraph (a)(2) of this section.

Table 1—Benzidine-Based Chemical Substances

CAS or accession No.

C.I. name

C.I. No.

Chemical name

117-33-9

Not available

Not available

1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[2-[4'-[2-(4-hydroxyphenyl)diazenyl][1,1'-biphenyl]-4-yl]diazenyl]

65150-87-0

Not available

Not available

1,3,6-Naphthalenetrisulfonic acid, 8-hydroxy-7-[2-[4'-[2-(2-hydroxy-1-naphthalenyl)diazenyl][1,1'- biphenyl]-4-yl]diazenyl]-, lithium salt (1:3)

68214-82-4

Direct Navy BH

22590

2,7-Naphthalenedisulfonic acid, 5-amino-3-[2-[4'-[2-(7-amino-1-hydroxy-3-sulfo-2- naphthalenyl)diazenyl][1,1'-biphenyl]-4- yl]diazenyl]-4-hydroxy-, sodium salt (1:2)

72379-45-4

Not available

Not available

2,7-Naphthalenedisulfonic acid, 4-amino-5

hydroxy-3-[2-[4'-[2-[2-hydroxy-4-[(2- methylphenyl)amino]phenyl]diazenyl][1,1'- biphenyl]-4-yl]diazenyl]-6-(2-phenyldiazenyl)

Accession No. 21808

CBI

CBI

2,7-Naphthalenedisulfonic acid, 4-amino-5

CAS No. CBI (NA)

hydroxy [[[(substituted phenylamino)] substituted phenylazo] diphenyl]azo-, phenylazo-, disodium salt. (generic name)

Accession No. 24921

CBI

CBI

4-(Substituted naphthalenyl )azo diphenylyl azo-substituted carbopolycycle azo benzenesulfonic acid, sodium salt. (generic name)

CAS No.

Accession No. 26256

CBI

CBI

4-(Substituted phenyl)azo biphenylyl azo

CAS No. CBI (NA)

substituted carbopolycycloazo benzenesulfonic acid, sodium salt. (generic name)

Accession No. 26267

CBI

CBI

4-(Substituted phenyl)azo biphenylyl azo

CAS No. CBI (NA)

substituted carbopolycycle azo benzenesulfonic acid, sodium salt. (generic name)

Accession No. 26701

CBI

CBI

Phenylazoaminohydroxynaphthalenylazobiphenylazo substituted benzene sodium sulfonate. (generic name).

CAS No. CBI (NA)

Table 2—Benzidine-Based Chemical Substances

CAS No.

C.I. name

C.I. No.

Chemical name

92-87-5

Benzidine

Not available

[1,1'-Biphenyl]-4,4'-diamine.

531-85-1

Benzidine ⋅ 2HCl

Not available

[1,1'-Biphenyl]-4,4'-diamine, dihydrochloride.

573-58-0

C.I. Direct Red 28

22120

1- Naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4-amino-, disodium salt.

1937-37-7

C.I. Direct Black 38

30235

2,7-Naphthalenedisulfonic acid, 4-amino-3-[[4'-[(2,4-diaminophenyl) azo][1,1'-biphenyl]-4- yl]azo]-5-hydroxy-6-(phenylazo)-, disodium salt.

2302-97-8

C.I. Direct Red 44

22500

1-Naphthalenesulfonic acid, 8,8'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[7-hydroxy-, disodium salt.

2429-73-4

C.I. Direct Blue 2

22590

2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4'-[(7-amino-1-h ydroxy-3-sulfo-2-naphthalenyl )azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxy-, trisodium salt.

2429-79-0

C.I. Direct Orange 8

22130

Benzoic acid, 5-[[4'-[(1-amino-4-sulfo-2-naphthalenyl) azo][1,1'-biphenyl]-4-yl]azo]-2- hydroxy-, disodium salt.

2429-81-4

C.I. Direct Brown 31

35660

Benzoic acid, 5-[[4'-[[2,6-diamino-3-[[8-hydroxy-3,6-disulfo-7-[(4-sulfo-1-naphthalenyl)azo]-2- naphthalenyl]azo]-5-methylphenyl]azo][1,1'- biphenyl]-4-yl]azo]-2-hydroxy-, tetrasodium salt.

2429-82-5

C.I. Direct Brown 2

22311

Benzoic acid, 5-[[4'-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl) azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt.

2429-83-6

Direct Black 4

30245

2,7-Naphthalenedisulfonic acid, 4-amino-3-[[4'-[(2,4-diamino-5-methylphenyl)azo][1,1'-biphenyl]-4-yl]azo] -5-hydroxy-6-(phenylazo)-, disodium salt.

2429-84-7

C.I. Direct Red 1

22310

Benzoic acid, 5-[[4'-[(2-amino-8-hydroxy-6-sulfo-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt.

2586-58-5

C.I. Direct Brown 1:2

30110

Benzoic acid, 5-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfophenyl)azo]phenyl]azo][1,1'-biphenyl]-4- yl]azo]-2-hydroxy-, disodium salt.

2602-46-2

C.I. Direct Blue 6

22610

2,7-Naphthalenedisulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[5-amino-4-hydroxy-, tetrasodium salt.

2893-80-3

C.I. Direct Brown 6

30140

Benzoic acid, 5-[[4'-[[2,4-dihydroxy-3-[(4-sulfophenyl) azo]phenyl]azo][1,1'-biphenyl]-4- yl]azo]-2-hydroxy-, disodium salt.

3530-19-6

C.I. Direct Red 37

22240

1,3-Naphthalenedisulfonic acid, 8-[[4'-[(4-ethoxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-7-hydroxy-, disodium salt

3567-65-5

C.I. Acid Red 85

22245

1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[[4'-[[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-, disodium salt.

3626-28-6

C.I. Direct Green 1

30280

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'- biphenyl]-4- yl]azo]-6-(phenylazo)-, disodium salt.

3811-71-0

C.I. Direct Brown 1

30045

Benzoic acid, 5-[[4'-[[2,4-diamino-5-[(4-sulfophenyl) azo]phenyl]azo][1,1' biphenyl]-4- yl]azo]-2-hydroxy-, disodium salt.

4335-09-5

C.I. Direct Green 6

30295

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-6-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4- yl]azo]-3-[(4-nitrophenyl)azo]-, disodium salt.

6358-80-1

C.I. Acid Black 94

30336

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[[4'-[[4-hydroxy-2-[(2- methylphenyl)amino]phenyl]azo] [1,1'- biphenyl]-4-yl]azo]-6-[(4-sulfophenyl) azo]-, trisodium salt.

6360-29-8

C.I. Direct Brown 27

31725

Benzoic acid, 5-[[4'-[[4-[(4-amino-7-sulfo-1-naphthalenyl)azo]-6-sulfo-1-naphthalenyl]azo][1,1'-biphenyl]-4-yl] azo]-2- hydroxy-, trisodium salt.

6360-54-9

C.I. Direct Brown 154

30120

Benzoic acid, 5-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfophenyl)azo]phenyl] azo][1,1'-biphenyl]-4-yl]azo]-2- hydroxy-3-methyl-, disodium salt.

8014-91-3

C.I. Direct Brown 74

36300

Benzoic acid, 3,3'-[(3,7-disulfo-1,5-naphthalenediyl)bis [azo(6-hydroxy-3,1-phenylene )azo[6(or7)-sulfo-4,1-naphtha lenediyl]azo[1,1'-biphenyl]-4,4'-diylazo]]bis[6-hydroxy-, hexasodium salt.

16071-86-6

C.I. Direct Brown 95

30145

Cuprate(2-), [5-[[4'-[[2,6-dihydroxy-3-[(2-hydroxy-5-sulfophenyl)azo]phenyl] azo][1,1'- biphenyl]-4-yl]azo]-2-hydroxybenzoato(4-)]-, disodium salt.

(2) The significant new uses are:

(i) For each of the chemical substances listed in Table 2 of this section, any use other than use as a reagent to test for hydrogen peroxide in milk;  a reagent to test for hydrogen sulfate, hydrogen cyanide, and nicotine;  a stain in microscopy;  a reagent for detecting blood;  an analytical standard;  and, additionally for Colour Index (C.I.) Direct Red 28 (Congo Red) (CAS No. 573–58–0), an indicator dye.

(ii) For the chemical substances listed in Table 1 of this section:  Any use.

(b) Specific requirements. The provisions of subpart A of this part apply to this section except as modified by this paragraph (b).

(1) Revocation of certain notification exemptions. The provisions of § 721.45(f) do not apply to this section. A person who imports or processes a chemical substance identified in paragraph (a)(1) of this section as part of an article for a significant new use described in paragraph (a)(2) of this section is not exempt from submitting a significant new use notice.

(2) [Reserved]

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Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment § 40.721.1660 Benzidine-based chemical substances - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-sect-40-721-1660/

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