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78755-81-4

78755-81-4 structure
78755-81-4 structure
  • Name: Flumazenil
  • Chemical Name: flumazenil
  • CAS Number: 78755-81-4
  • Molecular Formula: C15H14FN3O3
  • Molecular Weight: 303.288
  • Catalog: API Special medicine Antidote
  • Create Date: 2018-07-26 18:54:32
  • Modify Date: 2024-01-02 19:52:23
  • Flumazenil is a competitive GABAA receptor antagonist, used in the treatment of benzodiazepine overdoses.
Name flumazenil
Synonyms Romazicon
Lanexat
Anexate
Ethyl 8-fluoro-5-methyl-6-oxo-5,6-dihydro-4H-benzo[f]imidazo[1,5-a][1,4]diazepine-3-carboxylate
Ro-15-1788
Ro 15-1788
YM-684
Ro 1722
Ethyl 8-fluoro-5-methyl-6-oxo-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylate
4H-Imidazo[1,5-a][1,4]benzodiazepine-3-carboxylic acid, 8-fluoro-5,6-dihydro-5-methyl-6-oxo-, ethyl ester
Mazicon
Flumazenil
FMZ
Flumazepil
8-Fluoro-5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylic acid ethyl ester
Ethyl-8-fluoro-5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylate
4H-Imidazo(1,5-a)(1,4)benzodiazepine-3-carboxylic acid, 8-fluoro-5,6-dihydro-5-methyl-6-oxo-, ethyl ester
MFCD00242764
Description Flumazenil is a competitive GABAA receptor antagonist, used in the treatment of benzodiazepine overdoses.
Related Catalog
In Vivo Flumazenil interacts at the central benzodiazepine receptor to antagonize or reverse the behavioral, neurologic, and electrophysiologic effects of benzodiazepine agonists and inverse agonists. Flumazenil is of some benefit in hepatic encephalopathy, but until well-designed clinical trials are conducted, hepatic encephalopathy must be considered an investigational indication for flumazenil. Flumazenil has been shown to reverse sedation caused by intoxication with benzodiazepines alone or benzodiazepines in combination with other agents, but it should not be used when cyclic antidepressant intoxication is suspected[1]. Flumazenil (1 mg/kg) induces a strong anxiolytic effect in BALB/c mice tested in the elevated plus maze and light/dark test[2]. Flumazenil (10 mg/kg) effectively prevents the reduction produced by allopregnanolone in rats[3]. Flumazenil (5-20 mg/kg) antagonizes the anticonvulsant and adverse effects of diazepam but not GYKI 52466 in mice. Flumazenil slightly reduces the anticonvulsant activity of NBQX in the MES model but not in the PTZ test[4]. Flumazenil (3.0 mg/kg) blocks the changes withdrawal from chronic ethanol treatment, which leads to a decrease in open arm time and percent open arm entries[5].
Animal Admin Flumazenil is administered intraperitoneally in a volume of 10 mL/kg body weight 20 min before experimental testing. Two polyvinylchloride boxes (20×20×14 cm) covered with Plexiglas are connected by an opaque plastic tunnel (5×7×10 cm). One of these boxes is darkened. A light from a 100-W desk lamp 40 cm above the other box provided the only room illumination. This light level (300 lux) is chosen in order to avoid strain differences to be detected on time in the lit box (a measure of anxiety behaviour) in control animals. Indeed, in previous experiments, the BALB/c mice differ from C57BL/6 only in the high light condition. The subjects are individually tested in 5-min sessions between 1400 and 1700 hours. Mice are placed in the lit box to start the test session. The time spent in the lit box and the number of transitions from the dark box to the lit one are recorded after the first entry in the tunnel.
References

[1]. Hoffman EJ, et al. Flumazenil: a benzodiazepine antagonist. Clin Pharm. 1993 Sep;12(9):641-56; quiz 699-701.

[2]. Belzung C, et al. Flumazenil induces benzodiazepine partial agonist-like effects in BALB/c but not C57BL/6 mice. Psychopharmacology (Berl). 2000 Jan;148(1):24-32.

[3]. Fernandez-Guasti A, et al. Flumazenil blocks the anxiolytic action of allopregnanolone. Eur J Pharmacol. 1995 Jul 25;281(1):113-5.

[4]. Loscher W, et al. Effects of the non-NMDA antagonists NBQX and the 2,3-benzodiazepine GYKI 52466 on different seizure types in mice: comparison with diazepam and interactions with flumazenil. Br J Pharmacol. 1994 Dec;113(4):1349-57.

[5]. Moy SS, et al. Flumazenil blockade of anxiety following ethanol withdrawal in rats. Psychopharmacology (Berl). 1997 Jun;131(4):354-60.
Density 1.4±0.1 g/cm3
Boiling Point 528.0±50.0 °C at 760 mmHg
Melting Point 201-203°C
Molecular Formula C15H14FN3O3
Molecular Weight 303.288
Flash Point 273.1±30.1 °C
Exact Mass 303.101929
PSA 64.43000
LogP 0.67
Appearance solid | white
Vapour Pressure 0.0±1.4 mmHg at 25°C
Index of Refraction 1.634
Storage condition 2-8°C
Water Solubility 128 mg/L

CHEMICAL IDENTIFICATION

RTECS NUMBER :
NI2922170
CHEMICAL NAME :
4H-Imidazo(1,5-a)(1,4)benzodiazepine-3-carboxylic acid, 8-fluoro-5,6-dihydro-5-methyl-6- oxo-, ethyl ester
CAS REGISTRY NUMBER :
78755-81-4
LAST UPDATED :
199612
DATA ITEMS CITED :
15
MOLECULAR FORMULA :
C15-H14-F-N3-O3
MOLECULAR WEIGHT :
303.32

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Human - man
DOSE/DURATION :
5700 ng/kg/C
TOXIC EFFECTS :
Cardiac - cardiomyopathy including infarction Cardiac - arrhythmias (including changes in conduction) Cardiac - change in rate
REFERENCE :
BMJOAE British Medical Journal. (British Medical Assoc., BMA House, Tavistock Sq., London WC1H 9JR, UK) V.1- 1857- Volume(issue)/page/year: 304,1415,1992
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Human - woman
DOSE/DURATION :
2 mg/kg/2D-I
TOXIC EFFECTS :
Behavioral - hallucinations, distorted perceptions Behavioral - excitement Behavioral - aggression
REFERENCE :
LANCAO Lancet. (7 Adam St., London WC2N 6AD, UK) V.1- 1823- Volume(issue)/page/year: 339,488,1992
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Human - woman
DOSE/DURATION :
4 ug/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Cardiac - EKG changes not diagnostic of specified effects Cardiac - pulse rate increase, without fall in BP
REFERENCE :
PECAE5 Pediatric Emergency Care. (Williams & Wilkins, 428 E. Preston St., Baltimore, MD 21202) V.1- 1985- Volume(issue)/page/year: 11,186,1995
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
4200 mg/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - tremor Behavioral - rigidity (including catalepsy)
REFERENCE :
JTCEEM Journal de Toxicologie Clinique et Experimentale. (SPPIF, B.P.22, F-41353 Vineuil, France) V.5- 1985- Volume(issue)/page/year: 7,223,1987
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
1360 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
DRFUD4 Drugs of the Future. (J.R. Prous, S.A., Apartado de Correos 540, 08080 Barcelona, Spain) V.1- 1975/76- Volume(issue)/page/year: 7,402,1982
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
85 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Behavioral - rigidity (including catalepsy)
REFERENCE :
JTCEEM Journal de Toxicologie Clinique et Experimentale. (SPPIF, B.P.22, F-41353 Vineuil, France) V.5- 1985- Volume(issue)/page/year: 7,223,1987
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1300 mg/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - tremor Behavioral - rigidity (including catalepsy)
REFERENCE :
JTCEEM Journal de Toxicologie Clinique et Experimentale. (SPPIF, B.P.22, F-41353 Vineuil, France) V.5- 1985- Volume(issue)/page/year: 7,223,1987
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
4 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
DRFUD4 Drugs of the Future. (J.R. Prous, S.A., Apartado de Correos 540, 08080 Barcelona, Spain) V.1- 1975/76- Volume(issue)/page/year: 7,402,1982
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
>1 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 23,201,1992
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
143 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Behavioral - rigidity (including catalepsy)
REFERENCE :
JTCEEM Journal de Toxicologie Clinique et Experimentale. (SPPIF, B.P.22, F-41353 Vineuil, France) V.5- 1985- Volume(issue)/page/year: 7,223,1987
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Mammal - dog
DOSE/DURATION :
>640 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 23,201,1992
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Mammal - dog
DOSE/DURATION :
>30 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 23,201,1992
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
2 gm/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - tremor Behavioral - rigidity (including catalepsy)
REFERENCE :
JTCEEM Journal de Toxicologie Clinique et Experimentale. (SPPIF, B.P.22, F-41353 Vineuil, France) V.5- 1985- Volume(issue)/page/year: 7,223,1987 ** REPRODUCTIVE DATA **
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
21 mg/kg
SEX/DURATION :
female 14-20 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Newborn - behavioral
REFERENCE :
PNPPD7 Progress in Neuro-Psychopharmacology and Biological Psychiatry. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.6- 1982- Volume(issue)/page/year: 17,151,1993
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
220 mg/kg
SEX/DURATION :
female 11-21 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Newborn - behavioral
REFERENCE :
GEPHDP General Pharmacology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.6- 1975- Volume(issue)/page/year: 22,43,1991
Personal Protective Equipment Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes Xi
Risk Phrases R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Phrases S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . S27:Take off immediately all contaminated clothing . S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
RIDADR NONH for all modes of transport
WGK Germany 2
RTECS NI2922170
HS Code 2933990090
HS Code 2933990090
Summary 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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