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
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

Preparation Products

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N,N'-Diphenylbenzidine Suppliers

Suzhou Shanyang Pharmaceutical Technology Co.,
Tel
0512-0512-63268889 13862023007
Email
82169840@qq.com
Country
China
ProdList
466
Advantage
58
Xi’an ODER photoelectric materials Co., Ltd
Tel
029-81125951 18893797072
Fax
029-81125632
Email
kouxin@xaoder.com
Country
China
ProdList
116
Advantage
58
Zhengzhou HQ Material Co., Ltd.
Tel
0371-67759225 13526468238
Fax
+86-37155919558
Email
sales@hqmat.com
Country
China
ProdList
525
Advantage
60
Springchem New Material Technology Co.,Ltd
Tel
021-62885108 13917661608
Email
info@spring-chem.com
Country
China
ProdList
1685
Advantage
58
Xi'an Kaimeike New Material Co., Ltd.
Tel
13720451009
Email
13720451009@163.com
Country
China
ProdList
152
Advantage
58
Kindchem(Nanjing)Co.,Ltd
Tel
025-025-85281586 +86-18105181009
Email
sales@kindchem.cn
Country
China
ProdList
296
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
4006608290; 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40241
Advantage
62
3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801 18930552037
Fax
86-21-50328109
Email
3bsc@sina.com
Country
China
ProdList
15848
Advantage
69
future industrial shanghai co., ltd
Tel
400-0066400 13621662912
Fax
021-55660885
Email
sales@jonln.com
Country
China
ProdList
1998
Advantage
65
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View Lastest Price from N,N'-Diphenylbenzidine manufacturers

Chongqing Zhihe Biopharmaceutical Co., Ltd.
Product
N,N'-Diphenylbenzidine 531-91-9
Price
US $0.00-0.00/kg
Min. Order
0.10000000149011612kg
Purity
99%
Supply Ability
20tons
Release date
2024-01-16
Henan Fengda Chemical Co., Ltd
Product
N,N'-Diphenylbenzidine 531-91-9
Price
US $200.00-1.00/KG
Min. Order
1KG
Purity
99%, 99.5% Sublimated
Supply Ability
g-kg-tons, free sample is available
Release date
2023-12-30
Hebei Duling International Trade Co. LTD
Product
N,N'-Diphenylbenzidine 531-91-9
Price
US $50.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
30 tons
Release date
2023-04-07

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