N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine
N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine (CAS 138171-14-9) is a specialised organic compound with the molecular formula C32H28N2 and a molecular weight of 440.58 g/mol. This material serves as a crucial hole-transport component in organic light-emitting diodes (OLEDs), particularly for devices emitting light in the blue to yellow spectrum when paired with aluminium quinolate derivatives. It is widely recognised for its utility in advanced materials science and organic electronics.
- IUPAC
- N,N′-Bis(4-methylphenyl)-N,N′-diphenyl-1,4-benzenediamine
- Synonyms
- 4-diamineN,N′-Bis(4-methylphenyl)-N,N′-diphenyl-1,4-benzenediamineC32H28N2

Hole Transport Material in OLEDs
This compound functions effectively as a hole-transport material in the fabrication of organic light-emitting diodes (OLEDs). It is particularly suited for applications involving blue to yellow emitting devices when utilised in conjunction with aluminium quinolate (Alq3) derivatives.
Organic Electronics Applications
Its unique electronic properties make N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine a valuable component in the field of organic and printed electronics. It contributes to the development of advanced display technologies and other optoelectronic devices.
Materials Science Research
As a key material in materials science, this diamine derivative is employed in research and development for novel organic semiconductor applications. Its structure facilitates efficient charge transport, essential for device performance.
| Molecular weight | 440.58 |
|---|---|
| Empirical formula | C32H28N2 |
| Application | Hole-transport material for blue to yellow emitting OLEDs with aluminum quinolate (Alq3) derivatives.1 |
| Melting point | 190-194 °C |

Hazard statements
- H302Harmful if swallowed
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine used for?
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This compound is primarily used as a hole-transport material in organic light-emitting diodes (OLEDs), particularly for blue to yellow emitting devices when combined with aluminium quinolate (Alq3) derivatives. It also finds application in materials science and organic electronics.
What is the CAS number and chemical formula for N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine?
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The CAS number is 138171-14-9 and the empirical formula (Hill notation) is C32H28N2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical for research and development purposes. Purity and assay information are available on the product's specification sheet. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
What are the main safety hazards associated with this chemical?
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This compound is classified as harmful if swallowed (H302). Appropriate personal protective equipment, including a dust mask (type N95 or equivalent), eyeshields, and gloves, should be used when handling. Consult the Safety Data Sheet for full details.
How is N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine packed and exported?
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Tech Serve Solutions packs and exports this chemical in accordance with international shipping regulations for hazardous materials, ensuring safe transit to our global clientele.
How can I request a sample or a quote for N,N′-Diphenyl-N,N′-di-p-tolylbenzene-1,4-diamine?
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To request a sample or obtain a quotation, please contact our sales team directly through the contact information provided on the Tech Serve Solutions website.
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