ChemicalBook > CAS DataBase List > N,N'-Diphenylbenzidine

N,N'-Diphenylbenzidine

Product Name
N,N'-Diphenylbenzidine
CAS No.
531-91-9
Chemical Name
N,N'-Diphenylbenzidine
Synonyms
DFRR;N,N'-DiphenyL;Diphenylbenzidine;DEPHENYLBENZIDINE;TIMTEC-BB SBB002946;Benzidine, N,N'-diph;N'-Diphenylbenzidine;N,N-Diphenylbenzidne;N,N'-Diphenylbenzidi;SYM-DIPHENYLBENZIDINE
CBNumber
CB2394561
Molecular Formula
C24H20N2
Formula Weight
336.43
MOL File
531-91-9.mol
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N,N'-Diphenylbenzidine Property

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
InChIKey
FDRNXKXKFNHNCA-UHFFFAOYSA-N
CAS DataBase Reference
531-91-9(CAS DataBase Reference)
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)
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Safety

Hazard Codes 
Xi
Safety Statements 
22-24/25
RIDADR 
2811
WGK Germany 
3
F 
8
TSCA 
Yes
HazardClass 
6.1(b)
PackingGroup 
III
HS Code 
29215900
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H351Suspected of causing cancer

Precautionary statements

P201Obtain special instructions before use.

P202Do not handle until all safety precautions have been read and understood.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly 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/face protection.

P308+P313IF exposed or concerned: Get medical advice/attention.

P405Store locked up.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
D205206
Product name
N,N′-Diphenylbenzidine
Purity
97%
Packaging
10g
Price
$119
Updated
2024/03/01
Sigma-Aldrich
Product number
8.20530
Product name
N,N′-Diphenylbenzidine
Purity
for synthesis
Packaging
10G
Price
$126
Updated
2023/06/20
TCI Chemical
Product number
D0878
Product name
N,N'-Diphenylbenzidine
Purity
>98.0%(HPLC)(N)
Packaging
5g
Price
$71
Updated
2024/03/01
TCI Chemical
Product number
D0878
Product name
N,N'-Diphenylbenzidine
Purity
>98.0%(HPLC)(N)
Packaging
25g
Price
$214
Updated
2024/03/01
Alfa Aesar
Product number
A13802
Product name
N,N'-Diphenylbenzidine, 98%
Packaging
5g
Price
$58.7
Updated
2023/06/20
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N,N'-Diphenylbenzidine Chemical Properties,Usage,Production

Chemical Properties

GREY TO BROWNISH FINE CRYSTALLINE POWDER

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.

Uses

See diphenylamine.

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%). 

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 Preparation Products And Raw materials

Raw materials

Xylene Sodium bisulfite Potassium dichromate Diphenylamine Acetic acid Sulfuric acid

Preparation Products

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View Lastest Price from N,N'-Diphenylbenzidine manufacturers

Hebei Zhuanglai Chemical Trading Co Ltd
Product
N, N'-Diphenyl- Benzidine 531-91-9
Price
US $150.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
500kg
Release date
2024-12-19
Shanghai Daken Advanced Materials Co.,Ltd
Product
N,N'-Diphenylbenzidine 531-91-9
Price
US $0.00/KG
Min. Order
1KG
Purity
98.0% Min
Supply Ability
150KG /month
Release date
2021-11-19
Wuhan Circle Star Chem-medical Technology Co.,Ltd
Product
N,N'-Diphenylbenzidine 531-91-9
Price
US $0.00-0.00/kg
Min. Order
1kg
Purity
98
Supply Ability
500
Release date
2025-01-03

531-91-9, N,N'-DiphenylbenzidineRelated Search:

2-Dimethylaminoisopropyl chloride hydrochloride 2,2'-Benzidinedisulfonic acid Dichlorodiphenylsilane 4,4'-Diaminodiphenylsulfone Diphenylmethane 4-Aminobenzoic acid Benzidine 1,3-Diphenyl-2-thiourea 4,4'-Methylenedianiline 4-Aminobiphenyl Pigment Yellow 12 tert-Butylchlorodiphenylsilane Sulfanilic acid Diphenylphosphine 3,3',5,5'-Tetramethylbenzidine dihydrochloride Chlorodiphenylphosphine Diphenylsilane N,N-Dibenzylethanolamine

  • N,N'-DIPHENYLBENZIDINE
  • 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
  • <i>N,N'</i>-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-
  • Diphenylbenzidine
  • N,N-Diphenyl Diphenylamine
  • N,N-diphenylbenzidine (sym.)
  • N,N'-DiphenylBenzidineGr
  • SYM-DIPHENYLBENZIDINE
  • TIMTEC-BB SBB002946
  • 4,4'-DIANILINOBIPHENYL
  • 4,4'-BIS(ANILINO)BIPHENYL
  • DEPHENYLBENZIDINE
  • 4,4'-Bis(phenylamino)biphenyl
  • 1,1-Biphenyl-4,4-diamine, N,N-diphenyl-
  • N,N'-DiphenyL
  • N,N'-Diphenylbenzidine &gt
  • 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
  • 4,4'-Bis(phenylamino)-1,1'-biphenyl
  • 4,4'-DIANILINOBIPHENYL
  • N,N'-Diphenyl Benzidine 98% AR
  • 531-91-9
  • 53-91-9
  • 4C6H5NHC6H4C6H44NHC6H5
  • C24H20N2
  • Reagent for High-Performance Polymer Research