PROCAINE Basic information
- Product Name:
- 2-(Diethylamino)ethyl 4-aminobenzoate
- 2-(Diethylamino)ethyl p-aminobenzoate
- 2-Diethylaminoethylester kyseliny p-aminobenzoove
- 4-Aminobenzoic acid diethylaminoethyl ester
- Product Categories:
- Mol File:
PROCAINE Chemical Properties
- Melting point:
- Boiling point:
- 378.78°C (rough estimate)
- 1.0604 (rough estimate)
- refractive index
- 1.5430 (estimate)
- storage temp.
- Keep in dark place,Sealed in dry,Room Temperature
- DMSO (Slightly), Methanol (Slightly)
- pKa 9.04±0.01(H2O,t=25,I=0.1(NaCl))(Approximate)
- White to Off-White
- Water Solubility
- 9.45g/L(30 ºC)
- CAS DataBase Reference
- 59-46-1(CAS DataBase Reference)
- NIST Chemistry Reference
- Benzoic acid, 4-amino-, 2-(diethylamino)ethyl ester(59-46-1)
- Hazardous Substances Data
- 59-46-1(Hazardous Substances Data)
- LD50 in mice (mg/kg): 195 i.p.; 45 i.v. (North, Urbach)
PROCAINE Usage And Synthesis
Procaine is a local anesthetic with a para-amino function. Sensitization mainly concerns medical, dental and veterinary professions.
The hydrochloride salt of 2-(diethylamino) ethyl p-aminobenzoate (C13H21ClN2O2 or N2C6H4COOCH2CH2NH(C2H5)2HCl) is generally referred to as procaine. Although the PABA ester is insoluble in water, the hydrochloride salt is very soluble in water.
Procaine (Novocain) is mainly used in dental or medical procedures requiring infiltration anesthesia, peripheral block, or spinal block.
Procaine is a sodium channel blocker and inhibitor of a variety of processes.
ChEBI:Procaine is a benzoate ester, formally the result of esterification of 4-aminobenzoic acid with 2-diethylaminoethanol but formed experimentally by reaction of ethyl 4-aminobenzoate with 2-diethylaminoethanol. It has a role as a local anaesthetic, a central nervous system depressant, a peripheral nervous system drug and a drug allergen. It is a benzoate ester, a substituted aniline and a tertiary amino compound. It is functionally related to a 2-diethylaminoethanol and a 4-aminobenzoic acid. It is a conjugate base of a procaine(1+).
Procaine hydrochloride (Novocain) is readily hydrolyzed by plasma cholinesterase, although hepatic metabolism also occurs. It is not effective topically but is employed for infiltration, nerve block, and spinal anesthesia. It has a relatively slow onset and short (1 hour) duration of action. All concentrations can be combined with epinephrine. It is available in dental cartridges with phenylephrine as the vasoconstrictor.
Procaine was synthesized in 1904 to address the chemical instabilityof cocaine and the local irritation it produced. The pKa of procaine is 8.9; it has low lipid solubility and the estergroup is unstable in basic solutions. Procaine is available inconcentrations ranging from 0.25% to 10% with pHs adjustedto 5.5 to 6.0 for chemical stability. Procaine is also includedin some formulations of penicillin G to decrease the pain ofintramuscular injection.
Procaine is a local anesthetic with para-amino function. Sensitization mainly concerns the medical, dental, and veterinary professions.
Procaine is very quickly metabolizedin the plasma by cholinesterases and in the liver via ester hydrolysisby a pseudocholinesterase. The in vitroelimination half-life is approximately 60 seconds. Any conditionthat decreases the cholinesterase concentration may increaseexposure to procaine and potential toxicity. Decreasedenzyme activity can be found with genetic deficiency, liverdisease, malignancy, malnutrition, renal failure, burns, thirdtrimester of pregnancy, and following cardiopulmonary bypasssurgery. Ester hydrolysis produces PABA, the compoundresponsible for the allergic reactions common to theester anesthetics. Procaine is not used topically because of itsinability to pass through lipid membranes and finds use as aninfiltration agent for cutaneous or mucous membranes, forshort procedures. Procaine is also used for peripheral nerveblock and as an epidural agent to diagnose pain syndromes.
Experimental steps for synthesis of Procaine: In there-necked flask, add p-nitrobenzoic acid 60g, dimethylbenzene 360g, Diethylaminoethanol 44g, reflux divides water, temperature of reaction 141 ~ 143 ℃, reacts 12 hours; React complete, be cooled to less than 20 ℃, reclaim under reduced pressure dimethylbenzene; Reclaim complete, be cooled to less than 40 DEG C, slowly drip 570g6% dilute hydrochloric acid, after adding, stir 30 minutes, be cooled to 20 ~ 25 ℃, filter, obtain filtrate;Upper step filtrate is added in hydrogenation reaction cauldron, add catalyst Ni powder 15g, with nitrogen replacement 2 times, pass into hydrogen, pressure is 10 standard atmospheric pressures, control temperature of reaction 50 ~ 60 ℃ and carry out hydrogenation, react complete, filter, refined salt 16g is added in filtrate, stirring and dissolving, is cooled to 10 ℃, obtains procaine hydrochloride.
Procain crystallises as the dihydrate from aqueous EtOH and as the anhydrous material from pet ether or diethyl ether. The latter is hygroscopic. [Beilstein 14 IV 1138.]
PROCAINE Preparation Products And Raw materials
- 0519-85195575 15861192208
- 021-37318802 18616909727
- 176-03256889 17603256889
PROCAINE(59-46-1)Related Product Information
- 4-Amino-2-chlorobenzoic acid
- Otilonium Bromide Impurity 11
- Otilonium Bromide Impurity 12
- Procaine N-Oxide
- 4-Acetamido-2-propoxybenzoic Acid
- Penicillin,Procaine G
- Penicillin G Procaine/Sodium 3:1
- CONTAINING PROCAINE PENICILLIN "G"
- Penicillin mix 2:1:1(benzathine:procaine:potassium)
- Procaine penicillin G(fortified)
- PEN.G PROCAINE STER. BP 93 (3:1)
- Penicillin G procaine for injections
- procaine amide sulfate
- Penicillin G procaine/Benzathine 4:1
- Procaine Penicillin 3:1 Fortified BP98
- Penicillin G procaine/Potassium 3:1
- PENICILLIN G PROCAINE STERILE