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5-Fluorouracil

  • Name 5-Fluorouracil
  • EINECS200-085-6
  • CAS No. 51-21-8
  • Density1.53 g/cm3
  • PSA65.72000
  • LogP-0.79770
  • Solubilityinsoluble in water Molecular Structure of 51-21-8 (5-Fluorouracil)
  • Hazard SymbolsHarmfulXn,ToxicT,CorrosiveC,IrritantXi
  • SynonymsHarmfulXn,ToxicT,CorrosiveC,IrritantXi
  • Article Data130
  • 5-Fluorouracil Synthetic route

    56311-36-5, 100814-55-9, 100814-58-2

    trans-5-fluoro-6-acetoxy-5,6-dihydrouracil

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With triethylamine at 60℃;100%
    65906-75-4, 76481-58-8, 81033-59-2, 84471-52-3, 84471-53-4

    (+/-)-t-6-butoxy-r-5-ethoxycarbonyl-5-fluoro-5,6-dihydrouracil

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With hydrogenchloride for 1h; Product distribution; Heating; variation of reagent, temperature; in ethanol;95%
    65905-96-6

    methyl 5-fluoro-4-methoxy-2,6-dioxohexahydro-5-pyrimidinecarboxylate

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With hydrogenchloride In water for 2.5h;95%
    99429-06-8

    2,5-difluoro-4-chloro-pyrimidine

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With sodium hydroxide In water at 80℃; for 4h;93%

    5-bromo-5-fluoro-6-hydroxy-5,6-dihydrouracil

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With sulfuric acid In water at 80℃; for 7h;93%
    13593-36-7

    5-fluoro-6-chlorouracil

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With acetic acid; zinc at 100℃; for 5h; var.: reag.: hydrogen, Et3N or NaOH, cat.: Pd/C, in EtOH, RT;91%
    66-22-8

    uracil

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With C19XeF6 In dichloromethane for 24h; Ambient temperature;90%
    With fluorine; trifluoroacetic acid at -10℃; under 2250.23 Torr; Reagent/catalyst; Temperature; Pressure; Inert atmosphere;89.4%
    81.4%
    824-28-2

    1,3-dimethyl-5-azauracil

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    With fluoroacetamide; lithium diisopropyl amide In diethyl ether at 0℃; for 4h;88%
    With fluoroacetamide; lithium diisopropyl amide In diethyl ether at 0℃; for 4h; a novel ring transformation reaction;88%

    fluorine fluorosulfonate

    71-30-7

    Cytosine

    51-21-8

    5-fluorouracil

    Conditions
    ConditionsYield
    In water87.7%
    trifluoromethyl hypofluorite (CF3 OF)

    trifluoromethyl hypofluorite (CF3 OF)

    2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid monohydrate

    A

    51-21-8

    5-fluorouracil

    B

    220141-70-8

    5-fluoroorotic acid hydrate

    Conditions
    ConditionsYield
    In trichloromonofluoromethane (CFCl3); water; trifluoroacetic acid; PolytetrafluoroethyleneA n/a
    B 86%

    5-Fluorouracil Chemical Properties

    Molecular structure of Fluorouracil (CAS NO.51-21-8) is:

    Product Name: Fluorouracil
    CAS Registry Number: 51-21-8
    IUPAC Name: 5-fluoro-1H-pyrimidine-2,4-dione
    Molecular Weight: 130.077223 [g/mol]
    Molecular Formula: C4H3FN2O2
    XLogP3: -0.9
    H-Bond Donor: 2
    H-Bond Acceptor: 3 
    EINECS: 200-085-6
    Melting Point: 282-286 °C (dec.)(lit.)
    Surface Tension: 46.1 dyne/cm
    Density: 1.53 g/cm3
    Flash Point: 196.5 °C
    Enthalpy of Vaporization: 67.78 kJ/mol
    Boiling Point: 401.4 °C at 760 mmHg
    Vapour Pressure: 5.13E-07 mmHg at 25°C 
    Water Solubility: 12.2 g/L 20 °C
    Sensitive: Air Sensitive
    Stability: Stable. Light sensitive. Combustible. Incompatible with strong oxidizing agents, strong bases.
    Product Categories: Pharmaceutical Raw Materials;PYRIMIDINE;Heterocycles;Pyridines, Pyrimidines, Purines and Pteredines;Phenylacetic acid;Tegafur Carmofur;Nucleotides and Nucleosides;Biochemistry;Chemical Reagents for Pharmacology Research;Nucleobases and their analogs;Nucleosides, Nucleotides & Related Reagents;Nucleic acids;Bases & Related Reagents;Nucleotides;API's;Antitumour

    5-Fluorouracil History

     Fluorouracil (CAS NO.51-21-8) was synthesized by Robert Duschinsky in the late 1950s.

    5-Fluorouracil Uses

     Fluorouracil (CAS NO.51-21-8) can be used in against cancer for about 40 years, acts in several ways, but principally as a thymidylate synthase inhibitor. It can be used in colorectal cancer and pancreatic cancer,also it can be used for treating actinic (solar) keratoses and some types of basal cell carcinomas of the skin.

    5-Fluorouracil Toxicity Data With Reference

    Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
    dog LD50 oral 30mg/kg (30mg/kg) GASTROINTESTINAL: NAUSEA OR VOMITING Oyo Yakuri. Pharmacometrics. Vol. 16, Pg. 303, 1978.
    guinea pig LD50 intravenous 25mg/kg (25mg/kg) VASCULAR: BP ELEVATION NOT CHARACTERIZED IN AUTONOMIC SECTION Japanese Journal of Pharmacology. Vol. 30, Pg. 871, 1980.
    hamster LD10 parenteral 140mg/kg (140mg/kg)   Journal of Surgical Oncology. Vol. 15, Pg. 355, 1980.
    human TDLo intravenous 6mg/kg/3D (6mg/kg) CARDIAC: EKG CHANGES NOT DIAGNOSTIC OF ABOVE

    CARDIAC: OTHER CHANGES

    LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES
    British Medical Journal. Vol. 1, Pg. 547, 1978.
    human TDLo oral 450mg/kg/30D (450mg/kg) GASTROINTESTINAL: OTHER CHANGES

    BLOOD: CHANGES IN BONE MARROW NOT INCLUDED ABOVE
    Cancer Vol. 39, Pg. 1936, 1977.
    man TDLo intravenous 39mg/kg/1D-I (39mg/kg) CARDIAC: CHANGES IN CORONARY ARTERIES American Heart Journal. Vol. 114, Pg. 433, 1987.
    man TDLo intravenous 122mg/kg/9W-I (122mg/kg) SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE" Australian and New Zealand Journal of Medicine. Vol. 22, Pg. 385, 1992.
    mouse LD50 intracrebral 41600ug/kg (41.6mg/kg) PERIPHERAL NERVE AND SENSATION: SENSORY CHANGE INVOLVING PERIPHERAL NERVE

    SENSE ORGANS AND SPECIAL SENSES: PTOSIS: EYE

    SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE
    Chemotherapy Vol. 15, Pg. 519, 1967.
    mouse LD50 intraperitoneal 100mg/kg (100mg/kg)   Eksperimental'naya i Klinicheskaya Farmakoterapiya. Vol. 7, Pg. 100, 1977.
    mouse LD50 intravenous 81mg/kg (81mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 4, Pg. 90, 1973.
    mouse LD50 oral 115mg/kg (115mg/kg)   Journal of Medicinal Chemistry. Vol. 21, Pg. 738, 1978.
    mouse LD50 subcutaneous 169mg/kg (169mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 4, Pg. 90, 1973.
    mouse LD50 unreported 171mg/kg (171mg/kg)   Cancer Research. Vol. 46, Pg. 2703, 1986.
    mouse LDLo intratracheal 200mg/kg (200mg/kg)   Toxicology Letters. Vol. 30, Pg. 63, 1986.
    rabbit LD50 oral 18900ug/kg (18.9mg/kg) BEHAVIORAL: MUSCLE WEAKNESS

    GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"
    Kiso to Rinsho. Clinical Report. Vol. 8, Pg. 2603, 1974.
    rabbit LDLo intravenous 15mg/kg (15mg/kg) VASCULAR: BP ELEVATION NOT CHARACTERIZED IN AUTONOMIC SECTION Japanese Journal of Pharmacology. Vol. 30, Pg. 871, 1980.
    rat LD50 intramuscular 240mg/kg (240mg/kg)   K'at'ollik Taehak Uihakpu Nonmunjip. Journal of Catholic Medical College. Vol. 38, Pg. 481, 1985.
    rat LD50 intraperitoneal 70mg/kg (70mg/kg) GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"

    GASTROINTESTINAL: NAUSEA OR VOMITING
    Oyo Yakuri. Pharmacometrics. Vol. 5, Pg. 569, 1971.
    rat LD50 intravenous 245mg/kg (245mg/kg) GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"

    GASTROINTESTINAL: NAUSEA OR VOMITING
    Oyo Yakuri. Pharmacometrics. Vol. 5, Pg. 569, 1971.
    rat LD50 oral 230mg/kg (230mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 4, Pg. 90, 1973.
    rat LD50 parenteral 500mg/kg (500mg/kg)   Recent Results in Cancer Research. Vol. 52, Pg. 76, 1975.
    rat LD50 rectal 884mg/kg (884mg/kg) GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"

    GASTROINTESTINAL: OTHER CHANGES
    Kiso to Rinsho. Clinical Report. Vol. 12, Pg. 1309, 1978.
    rat LD50 subcutaneous 217mg/kg (217mg/kg)   Iyakuhin Kenkyu. Study of Medical Supplies. Vol. 4, Pg. 90, 1973.
    women TDLo intravenous 27mg/kg/4D-C (27mg/kg) CARDIAC: OTHER CHANGES British Medical Journal. Vol. 294, Pg. 125, 1987.
    women TDLo intravenous 150mg/kg/17W- (150mg/kg) BLOOD: OTHER HEMOLYSIS WITH OR WITHOUT ANEMIA British Journal of Haematology. Vol. 65, Pg. 357, 1987.

    5-Fluorouracil Safety Profile

    Hazard Codes: HarmfulXn,Xi ;ToxicT;CorrosiveC
    Risk Statements: 20/21/22 
    R20/21/22: Harmful by inhalation, in contact with skin and if swallowed.
    Safety Statements: 36/37/39-22 
    S36/37/39: Wear suitable protective clothing, gloves and eye/face protection. 
    S22: Do not breathe dust.
    RIDADR: UN 2811 6.1/PG 3
    WGK Germany: 3
    RTECS: YR0350000
    F: 10-23
    Hazard Note: Irritant/Highly Toxic
    TSCA: T
    HazardClass: 6.1
    PackingGroup: III
    HS Code: 29335995

    5-Fluorouracil Specification

     Fluorouracil , its cas register number is 51-21-8. It also can be called 2,4(1H,3H)-Pyrimidinedione, 5-fluoro- ; 2,4-Dioxo-5-fluoropyrimidine ; 5-FU ; 5-Faracil ; 5-Fluor-2,4(1H,3H)-pyrimidindion ; 5-Fluor-2,4-dihydroxypyrimidin .It is a white to nearly white crystalline powder and insoluble in water.

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