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 1999 · 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
In stock — same-day dispatch
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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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 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
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.