Molekula
Phenidone B (1-Phenyl-4-methyl-3-pyrazolidone)
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 B (1-Phenyl-4-methyl-3-pyrazolidone) is a chemical compound widely used as a photographic developer and in various industrial applications, including as a polymerization inhibitor and antioxidant. It is also employed in analytical chemistry for its reducing properties. This white to off-white crystalline powder has a CAS number of 2654-57-1, a molecular formula of C10H12N2O, and a molecular weight of 176.22. It should be stored at ambient conditions and handled with caution, as it carries a "Danger" signal word. Molekula supplies Phenidone B 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.
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25 g — £56.00 per pack ex VAT · £67.20 inc. VAT
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Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to pale yellow crystalline powder |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 27277119 |
| CAS Number | 2654-57-1 |
| IUPAC Name | 4-methyl-1-phenylpyrazolidin-3-one |
| EC Number | 220-180-6 |
| Molecular Formula | C10H12N2O |
| Molecular Weight | 176.22 |
| Exact Mass | 176.095 |
| SMILES | CC1CN(NC1=O)C2=CC=CC=C2 |
| InChIKey | ZZEYCGJAYIHIAZ-UHFFFAOYSA-N |
| InChI | InChI=1S/C10H12N2O/c1-8-7-12(11-10(8)13)9-5-3-2-4-6-9/h2-6,8H,7H2,1H3,(H,11,13) |
| PubChem CID | 98282 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933.19.9000 |
| 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
- H317 May cause an allergic skin reaction
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- 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
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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-4-methyl-3-pyrazolidinone
- 1-Phenyl-4-methyl-3-pyrazolidone
- 1-Phenyl-4-methylpyrazolidone-3
- 3-Pyrazolidinone, 4-methyl-1-phenyl-
- 4-Methyl-1-phenyl-3-pyrazolidinone
- 4-Methyl-1-phenyl-3-pyrazolidone
- 4-Methyl-1-phenyl-4,5-dihydro-1H-pyrazol-3-ol
- 4-methyl-1-phenylpyrazolidin-3-one
- Phenidone B
- Pyrazolidin3one, 4methyl1phenyl
Frequently asked questions
What is Phenidone B (1-Phenyl-4-methyl-3-pyrazolidone) commonly used for?
Phenidone B is primarily used as a photographic developer, particularly in black-and-white film processing, and as a chemical intermediate in organic synthesis.
What is the chemical formula and molecular weight of Phenidone B?
The chemical formula is **C₁₀H₁₂N₂O**, and the molecular weight is **176.22 g/mol**.
How should Phenidone B be stored?
Store Phenidone B at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible substances.
What grades or purities of Phenidone B does Molekula supply?
Molekula supplies Phenidone B in **analytical and technical grades**, with purity levels specified upon request.
Can Molekula supply Phenidone B in bulk quantities?
Yes, Molekula can provide Phenidone B in **bulk quantities**, with flexible packaging options depending on customer needs.
What documentation comes with an order of Phenidone B?
Each order includes a **Certificate of Analysis (CoA)**, Safety Data Sheet (SDS), and batch-specific documentation for traceability.
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.