N-Phenyl-p-phenylenediamine
N-Phenyl-p-phenylenediamine (CAS: 101-54-2, Formula: C6H5NHC6H4NH2) is an organic compound with a molecular weight of 184.24. This diamine serves as a valuable building block in chemical synthesis. It is primarily recognised for its utility in analytical chemistry, specifically for the colorimetric determination of trace nitrite levels. Supplied by Tech Serve Solutions with an assay of 98%, it is a key reagent for research and development applications.
- IUPAC
- 4-Aminodiphenylamine,Variamine Blue RT Base
- Synonyms
- 4-AminodiphenylamineVariamine Blue RT Base

Analytical Reagent
N-Phenyl-p-phenylenediamine is employed in analytical chemistry for the sensitive, rapid, and selective determination of trace nitrite concentrations using flow-injection colorimetry methods.
Chemical Synthesis Intermediate
As a diamine and organic building block, this compound is utilized in various organic synthesis pathways. Its structure lends itself to further functionalization in the creation of more complex molecules.
Colorimetric Analysis
Its ability to form coloured complexes makes it suitable for spectrophotometric analysis, particularly in methods requiring the quantification of specific ions or compounds.
| Molecular weight | 184.24 |
|---|---|
| Linear formula | C6H5NHC6H4NH2 |
| Assay | 98% |
| Solubility | ethanol: soluble10 mg/mL, clear, very dark red (Violet to brown to black solution) |
| Application | N-Phenyl-p-phenylenediamine was used in the determination of trace amounts of nitrite by a sensitive, rapid and selective flow-injection colorimetry method1. |
| Melting point | 68-72 °C(lit.) |


Hazard statements
- H302Harmful if swallowed
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P501Dispose of contents and container per local regulations
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 193 °C / 379.4 °F |
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-43-50/53 |
| Safety statements (S) | 36/37-60-61 |
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-Phenyl-p-phenylenediamine used for?
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N-Phenyl-p-phenylenediamine (CAS: 101-54-2) is primarily used as an analytical reagent for the determination of trace nitrite levels and as a building block in chemical synthesis.
What are the CAS number and formula for N-Phenyl-p-phenylenediamine?
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The CAS number for N-Phenyl-p-phenylenediamine is 101-54-2, and its chemical formula is C6H5NHC6H4NH2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies N-Phenyl-p-phenylenediamine with a minimum assay of 98%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should N-Phenyl-p-phenylenediamine be handled safely?
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Based on GHS information, N-Phenyl-p-phenylenediamine is classified as harmful if swallowed, may cause an allergic skin reaction, causes serious eye irritation, and is very toxic to aquatic life with long lasting effects. Appropriate personal protective equipment, including a dust mask (N95), eyeshields, face shields, and gloves, is recommended. Handle in a well-ventilated area and avoid release into the environment.
How is N-Phenyl-p-phenylenediamine packed and shipped?
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N-Phenyl-p-phenylenediamine is carefully packed to ensure safe transit and is available for global export by Tech Serve Solutions.
How can I request a sample or quote?
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To request a sample or a quote for N-Phenyl-p-phenylenediamine, please contact our sales team through the website or via direct inquiry.
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