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4,4'-Dimethyltriphenylamine

4,4'-Dimethyltriphenylamine Structure
4,4'-Dimethyltriphenylamine structure
CAS No.
20440-95-3
Chemical Name:
4,4'-Dimethyltriphenylamine
Synonyms
DMTPA;BIS(4-METHYLPHENYL)PHENYLAMINE;4-Methyl-N-phenyl-N-(p-tolyl)aniline;4,4'-Dimethyltriphen;N,N-DI-P-TOLYLANILINE;PHENYL(DI-P-TOLYL)AMINE;n-phenyl di-p-tolylamine;4,4DimehtylTriphenylamine;4-Methyl-N-(4-methylphenyl;4,4'-Dimethyltriphenylamine
CBNumber:
CB0686015
Molecular Formula:
C20H19N
Molecular Weight:
273.37
MDL Number:
MFCD00145004
MOL File:
20440-95-3.mol
MSDS File:
SDS
Last updated:2026-05-27 22:51:05
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4,4'-Dimethyltriphenylamine Properties

Melting point 112°C
Boiling point 289.3 °C
Density 1.079±0.06 g/cm3(Predicted)
storage temp. Sealed in dry,Room Temperature
form powder to crystal
pka -2.19±0.50(Predicted)
color White to Orange to Green
InChI InChI=1S/C20H19N/c1-16-8-12-19(13-9-16)21(18-6-4-3-5-7-18)20-14-10-17(2)11-15-20/h3-15H,1-2H3
InChIKey YWKKLBATUCJUHI-UHFFFAOYSA-N
SMILES C1(N(C2=CC=C(C)C=C2)C2=CC=CC=C2)=CC=C(C)C=C1
CAS DataBase Reference 20440-95-3(CAS DataBase Reference)
EPA Substance Registry System Benzenamine, 4-methyl-N-(4-methylphenyl)-N-phenyl- (20440-95-3)

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H315-H319
Precautionary statements  P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313
TSCA  TSCA listed
HS Code  29214990
NFPA 704
0
1 0

4,4'-Dimethyltriphenylamine price More Price(52)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
TCI Chemical D2347 4,4'-Dimethyltriphenylamine >98.0%(GC) 20440-95-3 1g $22 2026-04-30 Buy
TCI Chemical D2347 4,4'-Dimethyltriphenylamine >98.0%(GC) 20440-95-3 5g $45 2026-04-30 Buy
Apolloscientific OR350123 4,4'-Dimethyltriphenylamine >98% 20440-95-3 25g $21 2026-06-04 Buy
Apolloscientific OR350123 4,4'-Dimethyltriphenylamine >98% 20440-95-3 100g $71 2026-06-04 Buy
Activate Scientific AS22041 4,4`-Dimethyltriphenylamine 98% 20440-95-3 5g $18 2026-06-04 Buy
Product number Packaging Price Buy
D2347 1g $22 Buy
D2347 5g $45 Buy
OR350123 25g $21 Buy
OR350123 100g $71 Buy
AS22041 5g $18 Buy

4,4'-Dimethyltriphenylamine Chemical Properties,Uses,Production

Chemical Properties

White to yellow solid

Uses

4,4'-Dimethyltriphenylamine (DMTPA) can be used as a starting material for the synthesis of 4-[bis(4-methylphenyl)amino]benzaldehyde (BMABA). BMABA is a molecule exhibiting mechanophluorescence, and it has applications in fields such as sensors, data storage and smart switches [5]. The reaction process and mechanism are as follows:
This synthesis method is carried out via the Vilsmeier-Haack reaction. DMTPA (1.37 g, 5.01 mmol) was dissolved in DMF (2.3 mL, 29.8 mmol), and trichlorooxaphosphorane (0.46 mL, 5.02 mmol) was slowly added under an ice-water bath. Upon completion of the addition, the reaction temperature was adjusted to 100 °C and the mixture was heated for 3 h. After cooling to room temperature, the product was dissolved in dichloromethane, then neutralised with a sodium bicarbonate solution, extracted, dried over anhydrous Na₂SO₄, and the solid product was collected by vacuum distillation. Chromatographic separation was performed on a silica gel column using a mobile phase of dichloromethane and methanol (Vdichloromethane:Vmethanol = 100:1), yielding pale yellow BMABA (1.14 g, 75.6% yield).
(a) Synthesis of 4-[bis(4-methylphenyl)amino] benzaldehyde and (b) mechanism diagram of Vilsmeier-Haack reaction

Synthesis

Bromobenzene

108-86-1

Di-p-tolylamine

620-93-9

4,4'-Dimethyltriphenylamine

20440-95-3

Bromobenzene (7.71 g, 49.1 mmol), 4,4'-dimethyldiphenylamine (9.78 g, 49.6 mmol), sodium tert-butoxide (5.70 g, 59.3 mmol), palladium acetate (110 mg, 0.490 mmol), tri-tert-butylphosphine (396 mg, 1.96 mmol), and o-xylene (110 mL) were added sequentially under nitrogen protection to a 200 mL three-neck flask equipped with a stirrer. 1.96 mmol) and o-xylene (110 mL). The reaction mixture was stirred at 120 °C for 20 hours. Upon completion of the reaction, 150 mL of pure water was added to the mixture to wash and separate the organic phase. Subsequently, the organic phase was washed with another 150 mL of pure water, followed by washing with saturated saline and separation. The resulting organic layer was concentrated under reduced pressure and the solvent was removed by distillation. The resulting residue was purified by silica gel column chromatography to give 12.9 g of the final white crystalline product 4,4'-dimethyltriphenylamine (96% yield, 99.1% purity).

Purification Methods

Crystallise the amine once from EtOAc, then twice from EtOH to give pale yellow needles [Marsden J Chem Soc 627 1937, Beilstein 12 III 2033.]

References

[1] Journal of the American Chemical Society, 2012, vol. 134, # 50, p. 20262 - 20265
[2] Patent: JP5966736, 2016, B2. Location in patent: Paragraph 0075; 0078
[3] Organic and Biomolecular Chemistry, 2009, vol. 7, # 19, p. 3922 - 3925
[4] Organic Letters, 2005, vol. 7, # 11, p. 2209 - 2211
[5] Yu-Zhen Pan. (2024). [Comprehensive undergraduate experiment: synthesis and chromism of 4-[bis(4-methylphenyl)amino] benzaldehyde]. Se Pu = Chinese Journal of Chromatography, 42 3, 304–308. https://doi.org/10.3724/SP.J.1123.2023.11009

4,4'-Dimethyltriphenylamine Preparation Products And Raw materials

Raw materials

o-Phenanthroline Bromobenzene 4-Bromotoluene Aniline NISTC4147891
Di-p-tolylamine Iodobenzene Tri-tert-butylphosphine o-Xylene Palladium (II) Acetate

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Preparation Products

4,4'-Dimethyltriphenylamine Suppliers

Global( 238)Suppliers
Supplier Tel Email Country ProdList Advantage
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
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Capot Chemical Co., Ltd +86 (0) 571 85 58 67 18 China 18187 66
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078 sales@jingyan-chemical.com China 9963 60
Jia Xing Isenchem Co.,Ltd 0573-85285100 18627885956 isenchem@163.com China 9389 66
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
XiaoGan ShenYuan ChemPharm co,ltd 15527621225; 15527621225 1791901229@qq.com China 6746 52
SHANGHAI HOHANCE CHEMICAL CO.,LTD 021-31115312 18217084087 mary@hohance.com China 170 62
Supplier Advantage
J & K SCIENTIFIC LTD. 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 62
TCI (Shanghai) Development Co., Ltd. 81
Energy Chemical 61
Capot Chemical Co., Ltd 66
JinYan Chemicals(ShangHai) Co.,Ltd. 60
Jia Xing Isenchem Co.,Ltd 66
Shanghai Hanhong Scientific Co.,Ltd. 64
XiaoGan ShenYuan ChemPharm co,ltd 52
SHANGHAI HOHANCE CHEMICAL CO.,LTD 62

View Lastest Price from 4,4'-Dimethyltriphenylamine manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
4,4'-Dimethyltriphenylamine pictures 2026-09-11 4,4'-Dimethyltriphenylamine
20440-95-3
 $13.00-222.00 25g 0.98 25kg Shanghai UCHEM Inc.
4,4'-Dimethyltriphenylamine pictures 2026-03-20 4,4'-Dimethyltriphenylamine
20440-95-3
 1KG 99% 20 mt Hebei Chuanghai Biotechnology Co., Ltd
4,4'-Dimethyltriphenylamine pictures 2024-06-11 4,4'-Dimethyltriphenylamine
20440-95-3
 10G 0.98 500kg Kindchem(Nanjing)Co.,Ltd

4,4'-Dimethyltriphenylamine Spectrum

4,4'-Dimethyltriphenylamine(20440-95-3)1HNMR

20440-95-3(4,4'-Dimethyltriphenylamine)Related Search:

2,4-Difluoroaniline 2-Aminobenzotrifluoride 4-(Trifluoromethoxy)aniline N,N-Dimethylaniline 3,4-Dichloroaniline
N,N-Dimethyl-p-toluidine 3,4-Difluoroaniline 4-Aminoveratrole 3,4-Dimethylaniline Triphenylamine
2,4-Dimethyl aniline 2,4-Dimethoxyaniline 4-Aminobenzotrifluoride 2,4-Dichloroaniline Di-p-tolylamine
Phenyl valerate 4,4'-Dimethoxydiphenylamine 4,4'-Dicarboxydiphenyl Ether

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4,4-Dimethyltriphenylamine (DMTPA) Benzenamine, 4-methyl-N-(4-methylphenyl)-N-phenyl- N,N-Bis(4-methylphenyl)aniline Phenylbis(4-methylphenyl)amine N-Phenyl di-p-tolylamine,97% 4-Methyl-N-(4-methylphenyl)-N-phenylaniline 4-Methyl-N-phenyl-N-p-tolylbenzenamine ,98% 4,4'-Dimethyltriphen Bis(4-methylphenyl)phenylamine N,N-Di-p-tolylaniline Phenyl(di-p-tolyl)amine 4,4-dimethyl-N,N-diphenyl-1-cyclohexa-1,5-dienamine 4,4''-DIMETHYLTRIPHENYLAMINE 98+% 4-Methyl-N-(4-methylphenyl N,N-DI-P-TOLYLANILINE n-phenyl di-p-tolylamine PHENYL(DI-P-TOLYL)AMINE 4-methyl-n-(4-methylphenyl)-n-phenyl-benzenamin N-phenyl-N-(p-tolyl)-p-toluidine 4,4DimehtylTriphenylamine 4,4'-Dimethyltriphenylamine> 4,4-dimethyltrimethylaniline 4,4'-Dimethyltriphenylamine 4,4'-Dimethyltriphenylamine (DMTPA) 4,4′-Dimethyltriphenylamine, CAS 20440-95-3 4,4'-Dimethyltriphenylamine 4-Methyl-N-phenyl-N-(p-tolyl)aniline BIS(4-METHYLPHENYL)PHENYLAMINE DMTPA 4-Methyl-N-(4-methylphenyl)-N-phenylbenzenamine 20440-95-3 20940-95-3 Reagents for Conducting Polymer Research Electroluminescence Acid Anhydrides, etc. (Reagents for Conducting Polymer Research) White Powder Phenylamine Series Triphenylamine series Functional Materials Reagents for Conducting Polymer Research electronic pharmacetical Amines Acid Anhydrides, etc. (Reagents for Conducting Polymer Research) Electroluminescence