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Screening compounds

N,N'-Diphenylbenzidine

Also known as N4,N4'-Diphenyl-[1,1'-biphenyl]-4,4'-diamine, Diphenylbenzidine, Benzidine, N,N'-diphenyl-

CAS 531-91-9Formula C24H20N2Molar mass 336.44 g/molEC 208-521-7
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard 13 suppliers listed
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N,N'-Diphenylbenzidine chemical structure, C24H20N2, CAS 531-91-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
531-91-9
Formula
C24H20N2
Molar mass
336.44 g/mol
EC number
208-521-7
HS code
292159
Category
Screening compounds

What is N,N'-Diphenylbenzidine?

Plain description, key identifiers and synonyms

N,N'-Diphenylbenzidine is a chemical substance with the molecular formula C24H20N2 and a molar mass of 336.44 g/mol. Its CAS registry number is 531-91-9. The IUPAC name is 4-(4-anilinophenyl)-N-phenylaniline.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-(4-anilinophenyl)-N-phenylaniline
CAS number
531-91-9 CAS number cross-checked
EC number
208-521-7
Molecular formula
C24H20N2
UNII
8IO8V406YP
MDL number
MFCD00003016
InChIKey
FDRNXKXKFNHNCA-UHFFFAOYSA-N
InChI
InChI=1S/C24H20N2/c1-3-7-21(8-4-1)25-23-15-11-19(12-16-23)20-13-17-24(18-14-20)26-22-9-5-2-6-10-22/h1-18,25-26H
SMILES (canonical and isomeric)
C1=CC=C(C=C1)NC2=CC=C(C=C2)C3=CC=C(C=C3)NC4=CC=CC=C4

Synonyms

  • N4,N4'-Diphenyl-[1,1'-biphenyl]-4,4'-diamine
  • Diphenylbenzidine
  • Benzidine, N,N'-diphenyl-
  • [1,1'-Biphenyl]-4,4'-diamine, N,N'-diphenyl-
  • N,N-Diphenylbenzidine
  • (1,1'-Biphenyl)-4,4'-diamine, N,N'-diphenyl-
  • 4,4'-Bis(phenylamino)-1,1'-biphenyl
  • N(4),N(4')-Diphenyl-biphenyl-4,4'-diamine
  • N4,n4'-diphenyl-(1,1'-biphenyl)-4,4'-diamine
  • Benzidine, N,N'diphenyl
  • N4,N4'Diphenyl4,4'diamine
  • Benzidine, N,N'diphenyl (8CI)
  • Benzidine, N,N'-diphenyl-(8CI)
  • 4,4'Bis(phenylamino)1,1'biphenyl
  • (1,1'Biphenyl)4,4'diamine, N,N'diphenyl
  • (1,1'Biphenyl)4,4'diamine, N4,N4'diphenyl
  • 4,4'-Dianilinobiphenyl
  • 4-(4-anilinophenyl)-N-phenylaniline
  • 4-(4-anilinophenyl)-N-phenyl-aniline
  • N.N-Diphenylbenzidine
  • N,N'-diphenyl benzidine
  • N,N inverted exclamation mark -Diphenylbenzidine
  • N,N'-diphenyl[1,1'-biphenyl]-4,4'-diamine
  • N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine
  • phenyl{4-[4-(phenylamino)phenyl]phenyl}amine
Show all 36 synonyms
  • diphenylbenzidin
  • N-phenyl-4-[4-(phenylamino)phenyl]aniline
  • Diphenyl benzidine
  • N4,N4'-diphenylbiphenyl-4,4'-diamine
  • Benzidine,N'-diphenyl-
  • N,N\'-Diphenylbenzidine
  • N,N'-Diphenylbenzidine, 97%
  • N4,n4'-diphenyl-(1,
  • [1,4'-diamine, N,N'-diphenyl-
  • Diphenylbenzidine, 4,4'-Dianilinobiphenyl
  • (1,1'-Biphenyl)-4,4'-diamine, N4,N4'-diphenyl-

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
336.44 g/molcalc.
Exact mass
336.1626 Dacalc.
LogP (octanol/water)
6.84calc.
Topological polar surface area
24.06 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
5calc.
Heavy atoms
26calc.
Rings
4calc.
Aromatic rings
4calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc(Nc2ccc(-c3ccc(Nc4ccccc4)cc3)cc2)cc1

c1ccc(Nc2ccc(-c3ccc(Nc4ccccc4)cc3)cc2)cc1

4 rings, 26 atoms. This chemical is the scaffold itself.

14 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H332Harmful if inhaled.
  • H351Suspected of causing cancer.
Precautionary statements (16)
  • P203Obtain, read and follow all safety instructions before use.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

N,N'-Diphenylbenzidine suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 13 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

13 suppliers in 4 countries

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N,N'-Diphenylbenzidine price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code N,N'-Diphenylbenzidine is traded under.

HS 2921.59Indicative HS code

Aromatic polyamines and their derivatives, salts thereof, other

World exports in 2024
$510M
−0.4% vs 2023, imports $488M
2019 to 2024
Top exporters
  1. China26.6%
  2. Japan16.6%
  3. India * partner reported12.4%
Top importers
  1. United States17.9%
  2. Germany11.6%
  3. South Korea7.4%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for N,N'-Diphenylbenzidine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about N,N'-Diphenylbenzidine, based on the data on this page

What is N,N'-Diphenylbenzidine?

N,N'-Diphenylbenzidine is a chemical substance with the molecular formula C24H20N2 and a molar mass of 336.44 g/mol. Its CAS registry number is 531-91-9. The IUPAC name is 4-(4-anilinophenyl)-N-phenylaniline.

What is the CAS number of N,N'-Diphenylbenzidine?

The CAS registry number of N,N'-Diphenylbenzidine is 531-91-9.

What is the molecular formula and weight of N,N'-Diphenylbenzidine?

The molecular formula of N,N'-Diphenylbenzidine is C24H20N2 and its molar mass is 336.44 g/mol.

What is N,N'-Diphenylbenzidine used for?

Known uses and roles of N,N'-Diphenylbenzidine include building blocks in research and laboratory and screening compounds in research and laboratory.

Is N,N'-Diphenylbenzidine hazardous?

N,N'-Diphenylbenzidine carries the GHS signal word "Warning". Main hazards: harmful if swallowed, harmful in contact with skin, harmful if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of N,N'-Diphenylbenzidine?

N,N'-Diphenylbenzidine is usually classified under HS code 292159 (Aromatic polyamines and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy N,N'-Diphenylbenzidine?

CompoundList lists 13 suppliers of N,N'-Diphenylbenzidine in China, Germany, India and Japan. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy N,N'-Diphenylbenzidine in India?

1 supplier in India list N,N'-Diphenylbenzidine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of N,N'-Diphenylbenzidine?

Suppliers quote N,N'-Diphenylbenzidine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle N,N'-Diphenylbenzidine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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