Molekula
Phenidone A (1-Phenyl-3-pyrazolidinone)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Phenidone A (1-Phenyl-3-pyrazolidinone) is a chemical compound used primarily as a photographic developer and intermediate in organic synthesis. It is a white to off-white crystalline powder with a molecular formula of C9H10N2O and a molecular weight of 162.19 g/mol. It is classified as a hazardous substance with a signal word of Danger and must be stored at 2 to 8 °C. Molekula supplies Phenidone A from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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500 g — £149.60 per pack ex VAT · £179.52 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to off-white crystalline powder |
| Melting Point | 119 - 123°C |
| Ash | ≤ 0.1% |
| Assay | ≥ 98% |
| Iron (Fe) | ≤ 0.001% |
| Heavy metals (as Pb), mg/kg | ≤ 0.001% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Flash Point | 135 °C |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Vapour Pressure | 0.0000163 mmHg |
Source: PubChem CID 7090 (Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 27943258 |
| CAS Number | 92-43-3 |
| IUPAC Name | 1-phenylpyrazolidin-3-one |
| EC Number | 202-155-1 |
| Molecular Formula | C9H10N2O |
| Molecular Weight | 162.19 |
| Exact Mass | 162.0793 |
| SMILES | C1CN(NC1=O)C2=CC=CC=C2 |
| InChIKey | CMCWWLVWPDLCRM-UHFFFAOYSA-N |
| InChI | InChI=1S/C9H10N2O/c12-9-6-7-11(10-9)8-4-2-1-3-5-8/h1-5H,6-7H2,(H,10,12) |
| PubChem CID | 7090 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29331945 |
| Tariff Code | 2933199090 |
Safety & GHS
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Toxic
GHS06
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Hazardous to the Environment
GHS09
Hazard statements
- H301 Toxic if swallowed
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1-Phenyl-3-oxopyrazolidine
- 1-Phenyl-3-pyrazolidone
- 1-phenyl-4,5-dihydro-1H-pyrazol-3-ol
- 1-Phenylpyrazolid-3-one
- 1-phenylpyrazolidin-3-one
- 2-Pyrazolin-3-ol, 1-phenyl-
- 3-Pyrazolidinone, 1-phenyl-
- Fenidon
- Phenidone
- Pyrazolidinone, 1-phenyl-
Frequently asked questions
What is Phenidone A used for?
Phenidone A is primarily used as a photographic developer and in organic synthesis as an intermediate.
What is the chemical formula and molecular weight of Phenidone A?
The formula is C9H10N2O with a molecular weight of 162.19 g/mol.
How should Phenidone A be stored?
Store at 2 to 8 °C in a cool, dry place away from light and incompatible materials.
What grade of Phenidone A is available?
Molekula supplies Phenidone A in technical grade; custom purity options may be available upon request.
Can Molekula supply Phenidone A in bulk?
Yes, Molekula can supply Phenidone A in bulk quantities—please contact sales for volume pricing and availability.
What documentation comes with a purchase of Phenidone A?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation can be provided upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.