N,N'-Diphenylbenzidine
Also known as: N,N'-Diphenyl-1,1'-biphenyl-4,4'-diamine, N,N'-Diphenyl-4,4'-biphenyldiamine, N,N'-Diphenylbiphenyl-4,4'-diamine, 4,4'-Dianilinobiphenyl, Benzidine, N,N'-diphenyl-, [1,1'-Biphenyl]-4,4'-diamine, N,N'-diphenyl-, N,N'-(1,1'-Biphenyl-4,4'-diyl)bisaniline, MFCD00003016, EINECS 208-521-7
N,N'-Diphenylbenzidine (CAS 531-91-9) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C24H20N2 and a molecular weight of 336.429 g/mol. Key properties include a melting point of 246-248 °C(lit.), a boiling point of 535.0±43.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 342.0±19.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 531-91-9
- Jingsj CID
- J-27363-2
- Molecular Formula
- C24H20N2
- Molecular Weight
- 336.429 g/mol
- Category
- Organic Bases
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 246-248 °C(lit.) |
|---|---|
| Boiling Point | 535.0±43.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 342.0±19.9 °C |
| Exact Mass | 336.162659 |
| PSA | 24.06000 |
| LogP | 6.09 |
| Vapor Pressure | 0.0±1.4 mmHg at 25°C |
| Refractive Index | 1.690 |
Customs & Trade Information
| HS Code | 2921590090 |
|---|---|
| Summary | 2921590090. other aromatic polyamines and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of N,N'-Diphenylbenzidine?
The CAS number of N,N'-Diphenylbenzidine is 531-91-9.
What are the molecular formula and molecular weight of N,N'-Diphenylbenzidine?
N,N'-Diphenylbenzidine has molecular formula C24H20N2 and molecular weight 336.429 g/mol.
What are the upstream and downstream products of N,N'-Diphenylbenzidine?
For N,N'-Diphenylbenzidine, Upstream Products: 4,4'-Dibromobiphenyl, Chlorobenzene, Benzidine; Downstream Products: N4,N4'-bis(4-bromophenyl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine, N,N'-Diphenyl-N,N'-di(p-tolyl)benzidine, N,N'-Bis(3-methylphenyl)-N,N'-diphenylbenzidine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "N,N'-Diphenylbenzidine (CAS 531-91-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27363-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.