Diphenyl phosphoryl azide
Diphenyl phosphoryl azide (CAS 26386-88-9) is a chemical reagent with the molecular formula (C6H5O)2P(O)N3 and a molecular weight of 275.20 g/mol. This compound is primarily recognised for its utility as a source of the azide anion in organic synthesis. It serves as an effective reagent for azidation and diazo transfer reactions, facilitating the formation of new carbon-nitrogen bonds. Its applications span various chemical synthesis pathways, acting as a versatile synthetic reagent.
- IUPAC
- DPPA,Phosphoric acid diphenyl ester azide
- Synonyms
- DPPAPhosphoric acid diphenyl ester azide

Azidation and Diazo Transfer Reactions
Diphenyl phosphoryl azide is a key reagent for introducing the azide group into organic molecules. It is widely used in diazo transfer reactions, enabling the synthesis of diazo compounds which are valuable intermediates in organic chemistry.
C-X Bond Formation (Non-Halogen)
This compound participates in the formation of carbon-nitrogen bonds as part of synthetic strategies. Its reactivity allows for the controlled introduction of nitrogen functionalities in various organic frameworks.
General Chemical Synthesis
As a versatile synthetic reagent, Diphenyl phosphoryl azide finds application across a broad spectrum of organic synthesis projects. Its predictable reactivity makes it a reliable choice for researchers and industrial chemists.
| Molecular weight | 275.20 |
|---|---|
| Linear formula | (C6H5O)2P(O)N3 |
| Assay | ≥90% (HPLC) |
| Grade | technical |
| Boiling point | 157 °C/0.17 mmHg(lit.) |
| Density | 1.277 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.551(lit.)n20/D 1.551 |
| Storage temperature | 2-8°C |

Hazard statements
- H301Toxic if swallowed
- H311Toxic in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H331Toxic if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P305IF IN EYES
- P311Call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 112 °C / 233.6 °F |
| Transport (UN / ADR) | UN 3278 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 23/24/25-36/37/38 |
| Safety statements (S) | 26-36/37/39-45 |
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 Diphenyl phosphoryl azide used for?
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Diphenyl phosphoryl azide (CAS 26386-88-9) is primarily used as a reagent for azidation and diazo transfer reactions in organic synthesis, facilitating the formation of C-N bonds.
What are the CAS number and formula for Diphenyl phosphoryl azide?
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The CAS number for Diphenyl phosphoryl azide is 26386-88-9, and its linear formula is (C6H5O)2P(O)N3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diphenyl phosphoryl azide in a technical grade with an assay of ≥90% (HPLC). We do not represent this product as USP, BP, or EP grade.
How should Diphenyl phosphoryl azide be handled safely?
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Diphenyl phosphoryl azide is a dangerous substance requiring careful handling. It is toxic if swallowed, in contact with skin, and if inhaled, and causes skin and eye irritation. Always use appropriate personal protective equipment, including eyeshields, face shields, and suitable gloves and respirators, and handle in a well-ventilated area or fume hood.
Is Diphenyl phosphoryl azide shipped internationally by TSS?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Diphenyl phosphoryl azide, and ships products worldwide.
How can I request a sample or quote for Diphenyl phosphoryl azide?
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To request a sample or a quote for Diphenyl phosphoryl azide, please contact our sales team through the TSS website or via the provided contact details.
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