N,N'-Diphenyl-p-phenylenediamine

N,N'-二苯基对苯二胺

Also known as: 1,4-Dianilinobenzene, N,N'-Diphenyl-1,4-benzenediamine, 1,4-Bis(phenylamino)benzene, 1,4-Benzenediamine, N,N'-diphenyl-, 1-N,4-N-diphenylbenzene-1,4-diamine, p-phenylenediamine, N,N'-diphenyl-, DPPD, Antioxidant H, N,N'-Diphenyl-1,4-phenylenediamine, Naugard J, Nocrac DP

N,N'-Diphenyl-p-phenylenediamine (CAS 74-31-7) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C18H16N2 and a molecular weight of 260.333 g/mol. It is also known as 1,4-Dianilinobenzene, N,N'-Diphenyl-1,4-benzenediamine and 1,4-Bis(phenylamino)benzene. Key properties include a melting point of 143-145 °C(lit.), a boiling point of 469.2±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 297.0±13.0 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 74-31-7
Jingsj CID: J-1103444-7
Molecular Formula: C₁₈H₁₆N₂
Chinese Name: N,N'-二苯基对苯二胺
Molecular Weight: 260.333 g/mol
Category: Organic Bases
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	143-145 °C(lit.)
Boiling Point	469.2±0.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	297.0±13.0 °C

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of N,N'-Diphenyl-p-phenylenediamine?

The CAS number of N,N'-Diphenyl-p-phenylenediamine is 74-31-7.

What are the molecular formula and molecular weight of N,N'-Diphenyl-p-phenylenediamine?

N,N'-Diphenyl-p-phenylenediamine has molecular formula C18H16N2 and molecular weight 260.333 g/mol.

Is N,N'-Diphenyl-p-phenylenediamine hazardous?

N,N'-Diphenyl-p-phenylenediamine has GHS signal word Warning.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "N,N'-Diphenyl-p-phenylenediamine (CAS 74-31-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1103444-7 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.