Molekula
5-Fluorouracil
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
5-Fluorouracil is a fluorinated pyrimidine analog used primarily in chemotherapy for treating various cancers, including colorectal, breast, and gastrointestinal cancers. It functions as an antimetabolite by inhibiting thymidylate synthase, disrupting DNA synthesis. CAS: 51-21-8, Molecular Formula: C4H3FN2O2, Molecular Weight: 130.08 g/mol, Storage: Ambient, Signal Word: Danger. Molekula supplies 5-Fluorouracil 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.
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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25 g — £54.50 per pack ex VAT · £65.40 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 | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White to practically white crystalline powder |
| Odour | Practically odorless |
| Melting Point | 282 °C (decomposes) |
| Boiling Point | 361 °C at 760 mmHg |
| Water Solubility | 11.1 g/L at 22 °C |
| Solubility (other solvents) | Soluble in methanol-water mixtures |
| Vapour Pressure | 0.00001 mmHg at 25 °C |
| pKa | pKa = 8.02 |
| log P (octanol/water) | -0.89 |
Source: PubChem CID 3385 (HSDB, PAC Chemical Database, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 22050130 |
| CAS Number | 51-21-8 |
| IUPAC Name | 5-fluoro-1H-pyrimidine-2,4-dione |
| EC Number | 200-085-6 |
| Molecular Formula | C4H3FN2O2 |
| Molecular Weight | 130.08 |
| Exact Mass | 130.0179 |
| SMILES | C1=C(C(=O)NC(=O)N1)F |
| InChIKey | GHASVSINZRGABV-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H3FN2O2/c5-2-1-6-4(9)7-3(2)8/h1H,(H2,6,7,8,9) |
| PubChem CID | 3385 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| Tariff Code | 2933599590 |
Safety & GHS
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Toxic
GHS06
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Serious Health Hazard
GHS08
Hazard statements
- H301 Toxic if swallowed
- H312 Harmful in contact with skin
- H340 May cause genetic defects
- H351 Suspected of causing cancer
- H360FD May damage fertility. May damage the unborn child.
- H372 Causes damage to organs through prolonged or repeated exposure
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- 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
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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.
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
- Arumel
- Carzonal
- Efudex
- Fluoroblastin
- fluorouracil
- Fluracil
- Fluril
- Phthoruracil
- Queroplex
- Timazin
Frequently asked questions
What is 5-Fluorouracil used for?
5-Fluorouracil is primarily used in cancer chemotherapy, particularly for treating solid tumors such as colorectal, breast, and pancreatic cancers.
What is the chemical formula and molecular weight of 5-Fluorouracil?
The chemical formula is C4H3FN2O2, and the molecular weight is 130.08 g/mol.
How should 5-Fluorouracil be stored?
Store at ambient temperature, protected from light and moisture, and keep in a tightly closed container.
What grade of 5-Fluorouracil does Molekula supply?
Molekula supplies 5-Fluorouracil in pharmaceutical grade, suitable for research and clinical applications.
Can Molekula supply 5-Fluorouracil in bulk?
Yes, Molekula can supply 5-Fluorouracil in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a 5-Fluorouracil order?
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.