CAS 34977-63-4 — 1 EU Cosmetic Records

Chemical identity and properties

PubChem 2D chemical structure for CAS 34977-63-4

CAS 34977-63-4PubChem CID 135564609

Direct Black 51 3-salicylate

IUPAC name: disodium;6-amino-3-[[4-[(3-carboxy-2-hydroxyphenyl)diazenyl]naphthalen-1-yl]diazenyl]-4-oxidonaphthalene-2-sulfonate

Molecular formula: C27H17N5Na2O7S
Molecular weight: 601.5 g/mol
Exact mass: 601.06440764 Da
Topological polar surface area: 222.0 Å²
Hydrogen-bond donors: 3
Hydrogen-bond acceptors: 12
Covalent units: 3
Defined stereocentres: 0

Also known as

EINECS 252-305-5692I98XDPFEINECS 233-719-5NSC 515293-((4-((7-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo)-1-naphthyl)azo)salicylic acid, disodium saltDisodium 3(or 5)-((4-((7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)-1-naphthyl)azo)salicylateBenzoic acid, 3-(2-(4-(2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl)-1-naphthalenyl)diazenyl)-2-hydroxy-, sodium salt (1:2)DIRECT BLACK 51, 3-SALICYLATE-

13 more reported names

Benzoic acid, 3-((4-((7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-1-naphthalenyl)azo)-2-hydroxy-, disodium saltDisodium 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate3-((4-((7-AMINO-1-HYDROXY-3-SULFO-2-NAPHTHYL)AZO)-1-NAPHTHYL)AZO)SALICYLIC ACID DISODIUM SALTBenzoic acid, 3-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium saltBenzoic acid, 3-[2-[4-[2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-1-naphthalenyl]diazenyl]-2-hydroxy-, sodium salt (1:2)RefChem:589117252-305-5disodium 3-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylateUNII-692I98XDPFDisodium 3-((4-((7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo)-1-naphthyl)azo)salicylateZSWZTOBFKRWKDW-FEVJEDLBSA-L3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-Benzoic acid,disodium saltDisodium 3-({4-[(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl]naphthalen-1-yl}diazenyl)-2-hydroxybenzoate

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID50889589

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 34977-63-4

1 total

No records found for this CAS number.

How CAS 34977-63-4 is used on this site

CAS 34977-63-4 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 34977-63-4 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.