N,N'-Diphenyl-p-phenylenediamine
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 260.34000 g/mol. 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. It is classified under GHS with signal word Warning and hazard statements H317 — May cause an allergic skin reaction and H412 — Harmful to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Nov 4, 2026.
- CAS No.
- 74-31-7
- Jingsj CID
- J-1103444-9
- Molecular Formula
- C18H16N2
- Molecular Weight
- 260.34000 g/mol
- Category
- Organic Bases
- Last updated
- 11/4/2026
No offers for this compound yet.
Request a quotePhysicochemical 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 |
| Exact Mass | 260.131348 |
| PSA | 24.06000 |
| LogP | 3.32 |
| Vapor Pressure | 0.0±1.1 mmHg at 25°C |
| Refractive Index | 1.694 |
| Stability | Stable. Incompatible with strong acids, strong oxidizing agents |
| Additional Property | <0.1 g/100 mL at 20 ºC |
GHS Safety & Compliance
- H317 — May cause an allergic skin reaction
- H412 — Harmful to aquatic life with long lasting effects
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'-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 260.34000 g/mol.
Is N,N'-Diphenyl-p-phenylenediamine hazardous?
N,N'-Diphenyl-p-phenylenediamine has GHS signal word Warning and hazard statements H317 — May cause an allergic skin reaction; H412 — Harmful to aquatic life with long lasting effects.
What are the upstream and downstream products of N,N'-Diphenyl-p-phenylenediamine?
For N,N'-Diphenyl-p-phenylenediamine, Upstream Products: Chlorobenzene, N-Phenyl-1,4-phenylenediamine, p-Phenylenediamine; Downstream Products: N,N,N',N'-Tetraphenyl-1,4-phenylenediamine, 3-(Acryloyloxy)propyltrimethoxysilane, 2,5-Dichlorohydroquinone.
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'-Diphenyl-p-phenylenediamine (CAS 74-31-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1103444-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.