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N,N'-Diphenylbenzidine

N,N'-Diphenylbenzidine structure

CAS No.: 531-91-9

Chemical Name:: N,N'-Diphenylbenzidine

Synonyms: Diphenylbenzidine;DFRR;N,N'-DiphenyL;DEPHENYLBENZIDINE;TIMTEC-BB SBB002946;Benzidine, N,N'-diph;N'-Diphenylbenzidine;N,N-Diphenylbenzidne;N,N'-Diphenylbenzidi;SYM-DIPHENYLBENZIDINE

CBNumber:: CB2394561

Molecular Formula:: C24H20N2

Molecular Weight:: 336.43

MDL Number:: MFCD00003016

MOL File:: 531-91-9.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-08-26 08:01:05

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N,N'-Diphenylbenzidine Properties

Melting point	246-248 °C(lit.)
Boiling point	462.9°C (rough estimate)
Density	1.1750 (rough estimate)
vapor density	11.6 (vs air)
refractive index	1.7620 (estimate)
Flash point	>110°C
storage temp.	Store below +30°C.
solubility	Acetone (Slightly), DMF (Slightly), DMSO (Slightly), Ethyl Acetate (Slightly, Sonicated)
form	Fine Crystalline Powder
pka	1.31±0.40(Predicted)
color	Gray to brownish
Water Solubility	Insoluble in water.
Sensitive	Light Sensitive
Merck	14,3319
BRN	2220993
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
InChIKey	FDRNXKXKFNHNCA-UHFFFAOYSA-N
SMILES	N(c1ccccc1)c2ccc(cc2)-c3ccc(Nc4ccccc4)cc3
CAS DataBase Reference	531-91-9(CAS DataBase Reference)
FDA UNII	8IO8V406YP
NIST Chemistry Reference	[1,1'-Biphenyl]-4,4'-diamine, n,n'-diphenyl-(531-91-9)
EPA Substance Registry System	[1,1'-Biphenyl]-4,4'-diamine, N,N'-diphenyl- (531-91-9)
UNSPSC Code	12352116
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07,GHS08

Signal word

Warning

Hazard statements

H302+H312+H332-H351

Precautionary statements

P201-P202-P261-P264-P270-P271-P280-P301+P312+P330-P302+P352+P312+P362+P364-P304+P340+P312-P308+P313-P405-P501

PPE

Eyeshields, Gloves, type N95 (US)

Hazard Codes

Safety Statements

22-24/25

RIDADR

2811

WGK Germany

TSCA

TSCA listed

HazardClass

6.1(b)

PackingGroup

III

HS Code

29215900

Storage Class

11 - Combustible Solids

NFPA 704

	1
0		1

N,N'-Diphenylbenzidine price More Price(57)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	D205206	N,N′-Diphenylbenzidine 97%	531-91-9	10g	$131	2026-04-30	Buy
Sigma-Aldrich	8.20530	N,N′-Diphenylbenzidine for synthesis	531-91-9	10G	$146	2026-04-30	Buy
TCI Chemical	D0878	N,N'-Diphenylbenzidine >98.0%(HPLC)(N)	531-91-9	5g	$67	2026-04-30	Buy
TCI Chemical	D0878	N,N'-Diphenylbenzidine >98.0%(HPLC)(N)	531-91-9	25g	$203	2026-04-30	Buy
Cayman Chemical	45199	DPB ≥98%	531-91-9	5g	$65	2026-04-30	Buy

Product number	Packaging	Price	Buy
D205206	10g	$131	Buy
8.20530	10G	$146	Buy
D0878	5g	$67	Buy
D0878	25g	$203	Buy
45199	5g	$65	Buy

N,N'-Diphenylbenzidine Chemical Properties,Uses,Production

Indicator

Method for preparing an N,N'-diphenylbenzidine indicator solution: Dissolve 1.0 g of N,N'-diphenylbenzidine in 100 mL of sulphuric acid (96%). This redox indicator has an E₀ (pH 0) of +0.76. At the titration endpoint, the colour changes from violet (oxidised state) to colourless (reduced state).

Chemical Properties

GREY TO BROWNISH FINE CRYSTALLINE POWDER

Uses

See diphenylamine.

Uses

N,N'-Diphenylbenzidine is an indicator suitable for redox titrations, e.g. with dichromate or cerium(IV) sulfate 1,2. It is also used as intermediates in organic synthesis.

Synthesis

The synthesis of N,N'-Diphenylbenzidine is as follows:
3.12 g (10mmol) of 4,4'-dibromodiphenyl, 2.3 mL (25 mmol) of aniline, 2.9 g (30 mmol) of t-BuONa, 183 mg (0.2 mmol) of Pd2(dba)3, and 20 mg (0.1 mmol) of P(t-Bu)3 were dissolved in 30 mL of toluene, and then stirred at 90°C for 3 hrs. The reaction mixture was cooled to room temperature and three times extracted with distilled water and diethyl ether. Precipitates in an organic layer were filtered, washed with acetone and diethyl ether, and then dried in vacuum to obtain 0.3g of the intermediate compound C (yield: 90%). synthesis of N,N'-Diphenylbenzidine.png

Purification Methods

Crystallise the benzidine from toluene or ethyl acetate. Store it in the dark. [Beilstein 13 H 223, 13 IV 368.]

N,N'-Diphenylbenzidine synthesis

Synthesis of N,N'-Diphenylbenzidine from 4,4'-Dibromobiphenyl and Aniline

N,N'-Diphenylbenzidine Preparation Products And Raw materials

Raw materials

Xylene Sodium bisulfite Potassium dichromate Diphenylamine Acetic acid

Sulfuric acid Benzenamine, N-hydroxy-N-phenyl- 2-Aminodiphenylamine 1,1-Diphenylhydrazine N-Trimethylsilylaniline

Tetraphenylhydrazine 4,4'-Dibromobiphenyl Benzidine Aniline

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Preparation Products

N,N'-Diphenylbenzidine Suppliers

Global( 423)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Suzhou Shanyang Pharmaceutical Technology Co.,	0512-63268889 18506119477	82169840@qq.com	China	624	58
Zhengzhou HQ Material Co., Ltd.	0371-67759225 13526468238	sales@hqmat.com	China	510	60
Xi'an Kaimeike New Material Co., Ltd.	13720451009 13720451009	13720451009@163.com	China	204	58
Kindchem（Nanjing)Co.,Ltd	025-025-85281586 +86-18105181009	sales@kindchem.cn	China	296	58
Springchem New Material Technology Co.,Ltd	021-52836897 13917661608	info@spring-chem.com	China	2000	58
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
3B Pharmachem (Wuhan) International Co.,Ltd.	18930552037	3bsc@sina.com	China	15813	69
future industrial shanghai co., ltd	400-0066400 13621662912	sales@jonln.com	China	1989	65
Alfa Aesar	400-6106006	saleschina@alfa-asia.com	China	30103	84

Supplier	Advantage
Suzhou Shanyang Pharmaceutical Technology Co.,	58
Zhengzhou HQ Material Co., Ltd.	60
Xi'an Kaimeike New Material Co., Ltd.	58
Kindchem（Nanjing)Co.,Ltd	58
Springchem New Material Technology Co.,Ltd	58
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
3B Pharmachem (Wuhan) International Co.,Ltd.	69
future industrial shanghai co., ltd	65
Alfa Aesar	84

How does N,N'-Diphenylbenzidine become a "stabilizer" for organic photovoltaics?
DPB has become the core hole transport material in optoelectronic devices such as OLEDs due to its excellent hole mobility and....
Aug 26,2026

View Lastest Price from N,N'-Diphenylbenzidine manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-09-02	N,N'-Diphenylbenzidine 531-91-9	$1.00-200.00	1KG	99%, 99.5% Sublimated		Henan Fengda Chemical Co., Ltd
2026-08-18	N,N'-Diphenylbenzidine 531-91-9		1KG	98.0% Min	150KG /month	Shanghai Daken Advanced Materials Co.,Ltd
2026-05-28	N, N′ -Diphenyl- Benzidine 531-91-9	$80.00-100.00	10kg	99%	10000kg	Hebei Chuanghai Biotechnology Co,.LTD

N,N'-Diphenylbenzidine
531-91-9
$1.00-200.00
99%, 99.5% Sublimated
Henan Fengda Chemical Co., Ltd

N,N'-Diphenylbenzidine
531-91-9
$0.00
98.0% Min
Shanghai Daken Advanced Materials Co.,Ltd

N, N′ -Diphenyl- Benzidine
531-91-9
$80.00-100.00
99%
Hebei Chuanghai Biotechnology Co,.LTD

N,N'-Diphenylbenzidine Spectrum

N,N'-Diphenylbenzidine(531-91-9)MS N,N'-Diphenylbenzidine(531-91-9)¹HNMR N,N'-Diphenylbenzidine(531-91-9)¹³CNMR N,N'-Diphenylbenzidine(531-91-9)IR1 N,N'-Diphenylbenzidine(531-91-9)IR2 N,N'-Diphenylbenzidine(531-91-9)Raman

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N,N'-DIPHENYL BIPHENYLAMINE N'-Diphenylbenzidine 4-(4-anilinophenyl)-N-phenylaniline N,N'-Diphenylbenzidine, 97%, indicator Benzidine, N,N'-diph N,N'-(1,1'-Biphenyl-4,4'-diyl)bisaniline N,N'-Diphenyl-1,1'-biphenyl-4,4'-diamine N,N'-Diphenyl-4,4'-biphenyldiamine N,N'-Diphenylbiphenyl-4,4'-diamine N,N'-Diphenylbenzidine,97% N,N-Diphenylbenzidne N,N'-Diphenylbenzidi N,N'-Diphenylbenzidine 4,4'-BIS(ANILINO)BIPHENY [1,1'-Biphenyl]-4,4'-diamine,N4,N4'-diphenyl- N,N'-Diphenylbenzidine,2-aMine N,N'-diphenylbenzidine N,N'-Diphenylbenzidine DPB N,N'-Diphenylbenzidine 97% (4),N(4')-Diphenyl-biphenyl-4,4'-diamine 1’-biphenyl]-4,4’-diamine,n,n’-diphenyl-[ Benzidine, N,N'-diphenyl- N,N-Diphenyl Diphenylamine N,N-diphenylbenzidine (sym.) N,N'-DiphenylBenzidineGr SYM-DIPHENYLBENZIDINE TIMTEC-BB SBB002946 4,4'-DIANILINOBIPHENYL DEPHENYLBENZIDINE 4,4'-Bis(phenylamino)biphenyl 1,1-Biphenyl-4,4-diamine, N,N-diphenyl- N,N'-DiphenyL N,N'-Diphenylbenzidine > N,N'-DIPHENYLBENZIDINE FOR SYNTHESIS N,N'-Diphenylbenzidine USP/EP/BP DFRR N,N'-bisphenyl-(1,1'-biphenyl)-4,4'-diamine N,N-Diphenyl benzidine 98% AR 5GM Diphenyl benzidine solution N,N'-Diphenyl benzidine, GR 99% N,N`-DIPHENYL BENZIDINE AR N,N-Diphenylbenzidine, 98+% N,N' -diphenylbiphenylene diamine 4,4'-Bis(phenylamino)-1,1'-biphenyl N,N'-Diphenylbenzidine, ≥ 98.0% N,N'-Diphenylbenzidine N4,N4'-Diphenyl-[1,1'-biphenyl]-4,4'-diamine 4,4'-Bis(anilino)biphenyl N,N'-Diphenyl Benzidine 98% AR N,N'-Diphenylbenzidine Diphenylbenzidine 531-91-9 53-91-9 4C6H5NHC6H4C6H44NHC6H5 C24H20N2 Reagent for High-Performance Polymer Research Biphenyls (for High-Performance Polymer Research) Organic Building Blocks Nitrogen Compounds

N,N'-Diphenylbenzidine

N,N'-Diphenylbenzidine Properties

SAFETY

Risk and Safety Statements

N,N'-Diphenylbenzidine price More Price(57)

N,N'-Diphenylbenzidine Chemical Properties,Uses,Production

Indicator

Chemical Properties

Uses

Uses

Synthesis

Purification Methods

N,N'-Diphenylbenzidine synthesis

N,N'-Diphenylbenzidine Preparation Products And Raw materials

Raw materials

Preparation Products

N,N'-Diphenylbenzidine Suppliers

Related articles

View Lastest Price from N,N'-Diphenylbenzidine manufacturers

N,N'-Diphenylbenzidine Spectrum

531-91-9(N,N'-Diphenylbenzidine)Related Search: