Benzoic acid, 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium salt
直接黑51 [CI 27720]
Also known as: C.I. Direct Black 51, C.I. 27720, Direct Black 51, disodium 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-1-naphthyl]azo]salicylate, Benzoic acid, 3(or5)-[2-[4-[2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-1-naphthalenyl]diazenyl]-2-hydroxy-, sodium salt (1:2)
Benzoic acid, 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium salt (CAS 34977-63-4) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C27H17N5Na2O7S and a molecular weight of 601.49800 g/mol. It is also known as C.I. Direct Black 51, C.I. 27720 and Direct Black 51. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 34977-63-4
- Jingsj CID
- J-1594333-8
- Molecular Formula
- C27H17N5Na2O7S
- Chinese Name
- 直接黑51 [CI 27720]
- Molecular Weight
- 601.49800 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quoteFrequently Asked Questions
What is the CAS number of Benzoic acid, 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium salt?
The CAS number of Benzoic acid, 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium salt is 34977-63-4.
What are the molecular formula and molecular weight of Benzoic acid, 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium salt?
Benzoic acid, 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium salt has molecular formula C27H17N5Na2O7S and molecular weight 601.49800 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Benzoic acid, 3(or 5)-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-1-naphthalenyl]azo]-2-hydroxy-, disodium salt (CAS 34977-63-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1594333-8 (accessed 2026-10-25).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.