N,N′-Diphenylbenzidine
N,N′-Diphenylbenzidine (CAS 531-91-9) is a solid organic compound with a molecular weight of 336.43 g/mol. Primarily recognised as a redox indicator, it is instrumental in analytical chemistry for titrations. Its properties make it suitable for various chemical synthesis applications. Tech Serve Solutions supplies this compound with an assay of 97%.
- Synonyms
- 4-(C6H5NH)C6H4C6H4-4-(NHC6H5)

Redox Indicator in Titrations
N,N′-Diphenylbenzidine serves as a sensitive indicator in redox titrations, exhibiting distinct colour changes at specific potential ranges. This allows for precise endpoint determination in various analytical procedures.
Analytical Chemistry Reagent
Beyond its role as an indicator, this compound is employed as a reagent in specific analytical methods. Its chemical structure lends itself to applications requiring precise detection and quantification.
Organic Synthesis Building Block
As a molecule containing reactive amine functionalities, N,N′-Diphenylbenzidine can be utilised as a building block in the synthesis of more complex organic structures.
| Molecular weight | 336.43 |
|---|---|
| Linear formula | 4-(C6H5NH)C6H4C6H4-4-(NHC6H5) |
| Assay | 97% |
| Melting point | 246-248 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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′-Diphenylbenzidine used for?
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N,N′-Diphenylbenzidine is primarily used as a redox indicator in titrations and as a reagent in analytical chemistry. It also finds application as a building block in organic synthesis.
What are the CAS number and formula for N,N′-Diphenylbenzidine?
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The CAS number for N,N′-Diphenylbenzidine is 531-91-9. Its linear formula is 4-(C6H5NH)C6H4C6H4-4-(NHC6H5).
What grade and purity does Tech Serve Solutions supply for N,N′-Diphenylbenzidine?
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Tech Serve Solutions supplies N,N′-Diphenylbenzidine with an assay of 97%. This product is not represented as USP, BP, or EP grade.
How should N,N′-Diphenylbenzidine be handled safely?
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Handling N,N′-Diphenylbenzidine requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used if airborne exposure is a concern. Refer to the safety data sheet for comprehensive handling information.
Is N,N′-Diphenylbenzidine a controlled substance?
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The provided data does not indicate that N,N′-Diphenylbenzidine is a controlled substance.
How is N,N′-Diphenylbenzidine packed and exported?
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N,N′-Diphenylbenzidine is packed and exported by TSS according to industry best practices to ensure product integrity and safe transit.
How can I request a quote or sample of N,N′-Diphenylbenzidine?
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To request a quote or sample of N,N′-Diphenylbenzidine, please contact the TSS sales team through our website or by phone.
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