Furosemide

Furosemide Basic information
Efficient diuretics Chemical properties Uses production method Category Toxicity grading Acute toxicity Flammability and hazard characteristics Storage Characteristics Extinguishing agent
Product Name:Furosemide
Synonyms:4-CHLORO-N-FURFURYL-5-SULFAMOYLANTHRANILIC ACID;5-(AMINOSULPHONYL)-4-CHLORO-2-[(2-FURANYLMETHYL)AMINO]BENZOIC ACID;5-[AMINOSULFONYL]-4-CHLORO-2-[(2-FURANYLMETHYL)AMINO]BENZOIC ACID;LABOTEST-BB LT00244801;FUROSEMID;FUROSEMIDE;FRUSEMIDE;2-furfurylamino-4-chloro-5-sulfamoylbenzoic acid
CAS:54-31-9
MF:C12H11ClN2O5S
MW:330.74
EINECS:200-203-6
Product Categories:LASIX;Other APIs;Ion transporter and other ion channel;GABA;Aromatics;API;Organics;Intermediates & Fine Chemicals;Pharmaceuticals;API's;Heterocycles;Sulfur & Selenium Compounds;54-31-9
Mol File:54-31-9.mol
Furosemide Structure
Furosemide Chemical Properties
Melting point 220 °C (dec.) (lit.)
Boiling point 582.1±60.0 °C(Predicted)
density 1.606
refractive index 1.6580 (estimate)
Fp 11 °C
storage temp. 2-8°C
solubility Practically insoluble in water, soluble in acetone, sparingly soluble in ethanol (96 per cent), practically insoluble in methylene chloride. It dissolves in dilute solutions of alkali hydroxides.
form powder
pkapKa 3.8 (Uncertain)
color White to Off-White
Water Solubility Soluble in acetone, DMF or methanol. Slightly soluble in water
Merck 14,4309
BCS Class2 (CLogP), 4 (LogP)
Stability:Stable, but light sensitive, air sensitive and hygroscopic. Incompatible with strong oxidizing agents.
InChIKeyZZUFCTLCJUWOSV-UHFFFAOYSA-N
CAS DataBase Reference54-31-9(CAS DataBase Reference)
IARC3 (Vol. 50) 1990
EPA Substance Registry SystemFurosemide (54-31-9)
Safety Information
Hazard Codes T,F,Xi
Risk Statements 61-39/23/24/25-23/24/25-11-36/37/38
Safety Statements 7-16-36/37-45-53-36/37/39-22-36-26
RIDADR UN 1230 3/PG 2
WGK Germany 3
RTECS CB2625000
HS Code 2935904000
Hazardous Substances Data54-31-9(Hazardous Substances Data)
ToxicityLD50 orally in female, male rats: 2600, 2820 mg/kg (Goldenthal)
MSDS Information
Furosemide Usage And Synthesis
Efficient diureticsFurosemide, is a class of efficient sulfonamide diuretics acting on the medullary loop of the ascending branch of the medulla,it has a strong and short-term diuretic effect,which can increase the excretion of water, sodium, chloride, potassium, calcium, magnesium, phosphate and so on. It Mainly inhibits Na + and Cl-reabsorption in medullary and cortex of the medullary loop ascending branch crude segment , it can promote the excretion of sodium, chloride and potassium and affect the formation of renal medullary high osmotic pressure,it can interfer the process of concentration and dilution of urine, and it can increase urine output. This product can inhibit the activity of prostaglandin decomposition enzyme ,make the content of prostaglandin E2 increase,it has effect on expansion of blood vessels, it also plays a role in the proximal tubule, glomerular filtration,it can increase renal blood flow,and adjust renal blood flow distribution,and reduce blood flow so that the cortex surface blood flow increases,it promotes diuresis, its effect is fast and strong, it is used for other diuretics invalid cases. Clinically it is used for the treatment of cardiac edema, renal edema, cirrhosis ascitic fluid, peripheral edema caused by dysfunction or vascular disorders , and it may contribute to an upper urinary tract stones excretion. Administration intravenously can treat brain edema, it also can accelerate the excretion of toxic substances in cerebral edema in poisoning . Note that when the diuretic furosemide is used, since the excretion of urine Cl-, Na +, K +, H + is increasing, while the excretion of HCO3-is not increasing, long-term repeated drug use or large quantities of drugs can cause low salt syndrome, low chlorine and low potassium alkalosis.
In recent years, researchers find that inhalation of furosemide can have a significant effect on asthma, it is like cromolyn sodium, which through inhibition of allergic mediator release, it can inhibit the release of the neurotransmitter acetylcholine and substance P, which may be related to inhibiting chloride ions into the cell membranes of respiratory tract. Clinically,it is used in exercise-induced asthma, immediate and delayed type antigen-induced asthma.
The above information is edited by the Chemicalbook of Tian Ye.

Chemical propertieswhite or white alike crystalline powder. 206 ℃ melting point. Dissolved in acetone, methanol, dimethyl formamide, slightly soluble in ethanol, insoluble in water. Odorless, almost tasteless.
UsesThe diuretic effect of this product is a strong and short,it is a potent diuretic for the treatment of edema caused by heart, liver, kidney and other diseases, in particular, the base cases which other diuretics are invalid to;it can be used to treat acute pulmonary edema, brain edema , acute renal failure and high blood pressure and other diseases; in combination with fluid infusion, the product can promote poison excretion. Rat oral LD50 is 2600-2820mg/kg.
production method2,4-dichlorobenzoic acid (see 12740) by sulfochlorination,ammoniation, acidification ,dichloro-5-sulfamoyl-benzoic acid is obtained. Then after condensation with the chaff amine , furosemide is produced.
CategoryToxic substances
Toxicity gradingMiddle toxic
Acute toxicityOral-rat LD50: 2600 mg/kg; Oral-Mouse LD50: 2200 mg/kg.
Flammability and hazard characteristicsCombustible; fire decomposition produces toxic nitrogen oxides; sulfur oxides and chlorides smoke.
Storage CharacteristicsVentilated, low-temperature ,dry storeroom.
Extinguishing agentWater, carbon dioxide, dry powder,sandy soil.
DescriptionFurosemide (Item No. 26298) is an analytical reference standard categorized as a diuretic. Formulations containing diuretics, including furosemide, have been misused in sports for weight reduction and as masking agents in humans and to prevent exercise-induced pulmonary hemorrhage in racehorses. This product is intended for use in analytical forensic applications. This product is also available as a general research tool .
Chemical Propertieswhite to light yellow crystal powde
OriginatorLasix,Hoechst,W. Germany,1964
Usesdiuretic, antihypertensive
UsesFurosemide inhibits ion co-transport in the kidney. Furosemide is used as a diuretic.
UsesThis compound belongs to the aminobenzenesulfonamides. These are organic compounds containing a benzenesulfonamide moiety with an amine group attached to the benzene ring.
UsesAn inhibitor of NKCC and a GABAA receptor antagonist.
DefinitionA benzoic-sulfonamide-furan. It is a diuretic with fast onset and short duration and anti-hypertensive agent.
Manufacturing Process10.8 grams of 3-sulfamyl-4,6-dichlorobenzoic acid (0.04 mol) and 11.7 grams of furfurylamine (0.12 mol) are heated in 30 cc of diethyleneglycoldimethylether for 6 hours under reflux. When pouring the reaction mixture into 300 cc of 1 N hydrochloric acid, the reaction product is immediately separated off in the form of crystals. The light-yellow crude product is purified by dissolving it in 100 cc of warm 1 N sodium bicarbonate solution, precipitation by means of hydrochloric acid and subsequent recrystallization from ethanol/water, with addition of charcoal. Colorless prisms are obtained which decompose at 206°C while adopting a brown coloration, and with evolution of gas.
Brand nameLasix (Sanofi Aventis).
Therapeutic FunctionDiuretic
General DescriptionOdorless white to slightly yellow crystalline powder. A diuretic drug. Almost tasteless.
Air & Water ReactionsLight sensitive. Air sensitive. Slightly soluble in water.
Reactivity ProfileFurosemide may undergo hydrolysis at sufficiently low pH. The pH of aqueous solutions should be maintained in the basic range to prevent hydrolysis. Alcohol has been shown to improve the stability of Furosemide. Incompatible with strong oxidizing agents .
HazardPoison; moderately toxic; teratogen; questionable carcinogen; mutagen.
Fire HazardFlash point data for Furosemide are not available; however, Furosemide is probably combustible.
Biological ActivityLoop diuretic that inhibits the Na + /2Cl - /K + (NKCC) cotransporter. Also acts as a non-competitive antagonist at GABA A receptors with ~ 100-fold greater selectivity for α 6-containing receptors than α 1-containing receptors.
Biochem/physiol ActionsInhibits ion co-transport in the kidney.
Mechanism of actionFurosemide is a highly effective and quick-acting diuretic whose action, like all of the examined loop diuretics, is associated with blocking reabsorption of ions in the ascending bend of Henle’s loop. It is used for edema syndrome of various origins, edema of the lungs and brain, chronic renal insufficiency, some forms of hypertonic crises, and poisoning by barbiturates and other compounds excreted mainly with urine.
Clinical UseFurosemide has a saluretic effect 8- to 10-fold that of the thiazide diuretics; however, it has a shorter duration of action (~6–8 hours). Furosemide causes a marked excretion of sodium, chloride, potassium, calcium, magnesium, and bicarbonate ions, with as much as 25% of the filtered load of sodium excreted in response to initial treatment. It is effective for the treatment of edemas connected with cardiac, hepatic, and renal sites. Because it lowers the blood pressure similar to the thiazide derivatives, one of its uses is in the treatment of hypertension.
Side effectsClinical toxicity of furosemide and other loop diuretics primarily involves abnormalities of fluid and electrolyte balance. As with the thiazide diuretics, hypokalemia is an important adverse effect that can be prevented or treated with potassium supplements or coadministration of potassium-sparing diuretics. Increased calcium ion excretion can be a problem for postmenopausal osteopenic women, and furosemide generally should not be used in these individuals. Hyperuricemia, glucose intolerance, increased serum lipid levels, ototoxicity, and gastrointestinal side effects might be observed as well. Hypersensitivity reactions also are possible with furosemide (a sulfonamide-based drug), and cross-reactivity with other sulfonamide containing drugs is possible.
Safety ProfilePoison by intravenous route. Moderately toxic by ingestion and intraperitoneal routes. Human systemic effects by intravenous route: change in the sensitivity of the ear to sound, tinnitus, unspecified effects on the heart, constriction of the arteries, a decrease in urine volume, interstitial nephritis, metabolic alkalosis, pulse rate decrease, fall in blood pressure. Ingestion can damage the liver. Experimental teratogenic and reproductive effects. Questionable carcinogen with experimental carcinogenic effects. Human mutation data reported. When heated to decomposition it emits very toxic fumes of Cl-, NOx, and SOx.
SynthesisFurosemide, 4-chloro-N-furfuryl-5-sulfamoylanthranylic acid (21.4.11), is synthesized in a relatively simple manner from 2,4-dichlorobenzoic acid, which is converted into 5-aminosulfonyl-4,6-dichlorobenzoic acid (21.4.10) during subsequent reaction with chlorosulfonic acid and ammonia. Reacting this with furfurylamine gives furosemide (21.4.11) .

Synthesis_54-31-9

Veterinary Drugs and TreatmentsFurosemide is used for its diuretic activity in all species. It is used in small animals for the treatment of congestive cardiomyopathy, pulmonary edema, hypercalcuric nephropathy, uremia, as adjunctive therapy in hyperkalemia and, occasionally, as an antihypertensive agent. In cattle, it is approved for use for the treatment of post-parturient udder edema. It has been used to help prevent or reduce epistaxis (exercise-induced pulmonary hemorrhage; EIPH) in racehorses.
Drug interactionsPotentially hazardous interactions with other drugs
Analgesics: increased risk of nephrotoxicity with NSAIDs; antagonism of diuretic effect with NSAIDs.
Anti-arrhythmics: risk of cardiac toxicity with anti-arrhythmics if hypokalaemia occurs; effects of lidocaine and mexiletine antagonised.
Antibacterials: increased risk of ototoxicity with aminoglycosides, polymyxins and vancomycin; avoid with lymecycline.
Antidepressants: increased risk of hypokalaemia with reboxetine; enhanced hypotensive effect with MAOIs; increased risk of postural hypotension with tricyclics.
Antiepileptics: increased risk of hyponatraemia with carbamazepine; effects antagonised by phenytoin.
Antifungals: increased risk of hypokalaemia with amphotericin.
Antihypertensives: enhanced hypotensive effect; increased risk of first dose hypotensive effect with alpha-blockers; increased risk of ventricular arrhythmias with sotalol if hypokalaemia occurs.
Antipsychotics: increased risk of ventricular arrhythmias with amisulpride or pimozide (avoid with pimozide) if hypokalaemia occurs; enhanced hypotensive effect with phenothiazines.
Atomoxetine: hypokalaemia increases risk of ventricular arrhythmias.
Cardiac glycosides: increased toxicity if hypokalaemia occurs.
Ciclosporin: variable reports of increased nephrotoxicity, ototoxicity and hepatotoxicity.
Cytotoxics: concentration of furosemide increased by dasabuvir, ombitasvir and paritaprevir - reduce furosemide dose; increased risk of ventricular arrhythmias due to hypokalaemia with arsenic trioxide; increased risk of nephrotoxicity and ototoxicity with platinum compounds. Lithium: risk of toxicity.







MetabolismLittle biotransformation of furosemide takes place. It is mainly eliminated via the kidneys (80-90%); a small fraction of the dose undergoes biliary elimination and 10-15% of the activity can be recovered from the faeces.
storageStore at RT
references[1]. hochman dw. the extracellular space and epileptic activity in the adult brain: explaining the antiepileptic effects of furosemide and bumetanide. epilepsia, 2012, 53 suppl 1: 18-25.
[2]. chen h, sun d. the role of na-k-cl co-transporter in cerebral ischemia. neurol res, 2005, 27(3): 280-286.
[3]. prandota j. furosemide: progress in understanding its diuretic, anti-inflammatory, and bronchodilating mechanism of action, and use in the treatment of respiratory tract diseases. am j ther, 2002, 9(4): 317-328.
Furosemide Preparation Products And Raw materials
Raw materials2,4-Dichlorobenzoic acid-->2,4-Dichloro-5-sulfamoylbenzoic acid-->Furfurylamine-->6-DichlorobenzoicAcid
Preparation ProductsTriamterene
Ethyl 2-(Chlorosulfonyl)acetate FURFURYL ALCOHOL RESIN Furosemide AQUANTRAAL ALTRENOGEST 4-Aminobenzoic acid Benzidine Glycine Difluorochloromethane Sulfanilamide Ceftiofur sodium Sulfamethoxazole Tetrahydrofuran Diphenylamine Furfuryl alcohol Anthranilic acid Fomesafen Furan Frusemide

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