1-Phenyl-3-pyrazolidinone
1-Phenyl-3-pyrazolidinone (CAS: 92-43-3), with the molecular formula C9H10N2O and a molecular weight of 162.19 g/mol, is a heterocyclic organic compound. This chemical is primarily recognised for its utility in photographic processes. It is supplied by Tech Serve Solutions with an assay of 97% and is specifically designated for photographic purposes.
- IUPAC
- Phenidone

Photographic Developing Agent
1-Phenyl-3-pyrazolidinone is a key component in photographic developers. It acts as a reducing agent, facilitating the conversion of exposed silver halide crystals into metallic silver, thereby forming the visible image.
Organic Synthesis Intermediate
As a functionalized heterocyclic molecule, it serves as a versatile building block in the synthesis of more complex organic compounds. Its structure allows for various chemical modifications.
Research Chemical
This compound is utilized in research laboratories for exploring new chemical reactions and developing novel materials. Its known properties make it a useful reagent in synthetic chemistry studies.
| Molecular weight | 162.19 |
|---|---|
| Empirical formula | C9H10N2O |
| Assay | 97% |
| Grade | for photographic purposes |
| Melting point | 119-121 °C(lit.) |


Hazard statements
- H302Harmful if swallowed
- H411Toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-51/53 |
| Safety statements (S) | 61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Gene Information | rat ... Alox5(25290) |
|---|
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 1-Phenyl-3-pyrazolidinone used for?
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1-Phenyl-3-pyrazolidinone (CAS: 92-43-3) is primarily used in photographic developing processes and as a building block in organic synthesis. It is also employed as a research chemical.
What are the CAS number and molecular formula for 1-Phenyl-3-pyrazolidinone?
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The CAS number for 1-Phenyl-3-pyrazolidinone is 92-43-3, and its molecular formula is C9H10N2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-Phenyl-3-pyrazolidinone with a purity of 97%, specifically graded for photographic purposes. We do not represent this product as USP, BP, or EP grade.
How should 1-Phenyl-3-pyrazolidinone be handled safely?
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1-Phenyl-3-pyrazolidinone is classified with GHS07 and GHS09 symbols and a 'Warning' signal word. It is harmful if swallowed (H302) and toxic to aquatic life with long-lasting effects (H411). Appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, face shields, and gloves, should be used. Avoid release to the environment (P273).
How is this chemical packed and exported?
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1-Phenyl-3-pyrazolidinone is shipped and exported in compliance with relevant transport regulations, including UN 2811 (6.1/PGIII). Specific packaging details can be provided upon request.
How can I request a sample or quote for 1-Phenyl-3-pyrazolidinone?
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To request a sample or a quote for 1-Phenyl-3-pyrazolidinone, please contact our sales department through the TSS website or by phone.
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