5-Fluorocytosine
5-Fluorocytosine (CAS: 2022-85-7), with the molecular formula C4H4FN3O and a molar mass of 129.09 g/mol, is a synthetic fluorinated pyrimidine analogue. It functions as an antifungal agent by interfering with DNA and protein synthesis. This compound is valuable for biochemical research, particularly in studies concerning thymidylate synthase (TMP biosynthesis). Tech Serve Solutions supplies this chemical for laboratory and research applications.
- IUPAC
- 4-amino-5-fluoro-2(1H)-pyrimidinone,Flucytosine
- Synonyms
- Flucytosine4-amino-5-fluoro-2(1H)-pyrimidinone

Antifungal Research
Utilised in laboratory studies investigating antifungal mechanisms and the development of new therapeutic agents. Its interference with DNA and protein synthesis makes it a key compound for microbiological research.
Biochemical Studies
Serves as a research tool in biochemical investigations, specifically in studies related to thymidylate biosynthesis (TMP biosynthesis). It aids in understanding enzymatic pathways and metabolic processes.
Drug Discovery and Development
Employed in the early stages of drug discovery to explore potential new antifungal treatments and understand resistance mechanisms.
| Molecular weight | 129.09 |
|---|---|
| Empirical formula | C4H4FN3O |
| Storage temperature | 2-8°C |
| Application | Used in studies on TMP biosynthesis. |
| Melting point | 298-300 °C (dec.)(lit.) |

Hazard statements
- H361Suspected of damaging fertility or the unborn child
Precautionary statements
- P281Use personal protective equipment as required
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 63 |
| Safety statements (S) | 36/37 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 5-Fluorocytosine used for?
+
5-Fluorocytosine is used in laboratory studies concerning thymidylate biosynthesis and as an antifungal agent due to its interference with DNA and protein synthesis.
What is the CAS number and molecular formula for 5-Fluorocytosine?
+
The CAS number for 5-Fluorocytosine is 2022-85-7 and its molecular formula is C4H4FN3O.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 5-Fluorocytosine for research purposes. The specific assay and grade are available upon request. We do not represent this product as USP, BP, or EP grade.
What are the safety and handling precautions for 5-Fluorocytosine?
+
5-Fluorocytosine is classified with GHS08 symbol and a 'Warning' signal word, with hazard statement H361 (Suspected of damaging fertility or the unborn child). Recommended personal protective equipment includes eyeshields, gloves, and a P1 (EN143) or N95 (US) respirator filter. Handle with appropriate precautions, including P281 (Use personal protective equipment as required).
Is 5-Fluorocytosine a controlled substance?
+
Based on the provided data, there is no indication that 5-Fluorocytosine is a controlled substance. However, regulations can vary by region, and customers should verify local compliance.
How is 5-Fluorocytosine packed, shipped, and exported?
+
5-Fluorocytosine is carefully packed to ensure stability during transport and is available for export globally by Tech Serve Solutions. Specific packaging details and shipping options can be discussed with our sales team.
How can I request a sample or quote for 5-Fluorocytosine?
+
To request a sample or a quote for 5-Fluorocytosine, please contact our sales department through the contact information provided on our website. Our team will assist you promptly.
▶ Related products
![(±)-(E)-4-Ethyl-2-[(E)-hydroxyimino]-5-nitro-3-hexenamide (C8H13N3O4) — chemical structure, CAS 138472-01-2; Biochemicals & Reagents, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F138472-01-2.png&w=3840&q=75)
(±)-(E)-4-Ethyl-2-[(E)-hydroxyimino]-5-nitro-3-hexenamide
C8H13N3O4
Biochemicals & Reagents![(±)-(E)-4-Ethyl-2-[(Z)-hydroxyimino]-5-nitro-3-hexen-1-yl-nicotinamide (C14H18N4O4) — chemical structure, CAS 162626-99-5; Biochemicals & Reagents, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F162626-99-5.png&w=3840&q=75)
(±)-(E)-4-Ethyl-2-[(Z)-hydroxyimino]-5-nitro-3-hexen-1-yl-nicotinamide
C14H18N4O4
Biochemicals & Reagents
(±)-2,5-Dimethoxy-4-bromoamphetamine hydrobromide
Biochemicals & Reagents

(±)-2-(p-Methoxyphenoxy)propionic acid
C10H12O4
Biochemicals & Reagents
(±)-2-Amino-6,7-dihydroxy-1,2,3,4-tetrahydronaphthalene hydrobromide
C10H13NO2·HBr
Biochemicals & Reagents
(±)-2-Hydroxydecanoic acid
C10H20O3
Biochemicals & Reagents
(±)-3-Hydroxydecanoic acid
C10H20O3
Biochemicals & Reagents
(±)-3-Hydroxyoctanoic acid
C8H16O3
Biochemicals & Reagents▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis