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Epinephrine hcl powder is a toxic substance. In case of fire during transportation, dry powder, foam, sand, carbon dioxide and fog water extinguishing agent can be used to extinguish fire. Epinephrine hcl is a slightly yellow crystalline powder. Its appearance can be judged by observing its color, shape, and size. The appearance of DL-ADRENALINE HYDRAHLORIDE is a result of factors such as purity, preparation method, and storage method. It is easily soluble in water and can form a clear solution.
It can also be dissolved in some organic solvents, such as methanol and chloroform. Its solubility is related to temperature and pH value. The refractive index is 1.57. The refractive index refers to the degree to which light rays deflect from air towards matter. The measurement of refractive index can be used to determine the purity and structure of a substance. It is an important compound used in biological, medical, and chemical research. The drugs used in this terminal product are widely used for the treatment of cardiovascular diseases, asthma treatment, local anesthesia, and other treatment methods. However, it should be noted that this product is a primary chemical and is only used for scientific research purposes.
Ionic properties: Epinephrine Hcl is an ionic compound. In water, its molecular structure is ionized to form a positively charged ion, C9H14NO3+, and a negatively charged chloride ion, Cl-. The two ions are linked together by ionic bonds to form a stable ionic crystal.
Stability: Epinephrine Hcl is relatively stable and not easy to decompose when stored at room temperature. However, under strong conditions such as light, heat, and oxidants, the molecular structure will be greatly changed, resulting in reduced efficacy or loss of therapeutic effect.
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Steam pressure |
3.7E-07mmHg at 25°C |
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Flash point |
199.1 °C |
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Boiling point |
405.6°C at 760 mmHg |
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Melting point |
244-249 ℃ (dec.) |
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Chemical Formula |
C9H14ClNO3 |
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m/z |
219.07 (100.0%), 221.06 (32.0%), 220.07 (9.7%), 222.07 (3.1%) |
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1. Synthesis method of 2,5-dihydroxybenzoate as raw material:
This synthesis method starts with 2,5-dihydroxybenzoate and is esterified by Ac2O. Subsequently, it is converted into epinephrine hcl powder through a series of steps, including hydroxyalkylation, deprotection, tautomerism, glutamization, etc. This method has a certain yield and purity.
2. Synthesis method using D, L-phenylalanine as raw material:
The basis of this method is to detect the comfort of D, L-phenylalanine residues through Fourier transform infrared spectroscopy and other structural characterization methods. For example, first by esterification of D, L-phenylalanine is the corresponding methyl ester, and then through a series of reduction and hydroxylation reactions, 6-hydroxyadenine is transformed into a DL adrenaline structure. This method has the advantages of high yield and high purity.
Epinephrine hcl uses in the rescue of cardiac arrest and anaphylactic shock, but also in the treatment of other allergic diseases (such as bronchial asthma and urticaria). Adrenaline hcl is an anti-shock vasoactive drug. The combination with local anesthetics is beneficial for local hemostasis and prolonged efficacy.
Core Applications in Clinical Emergency Medicine
When formulated into injections, the product is the first-line drug recommended by global cardiopulmonary resuscitation (CPR) guidelines. In cardiac arrest scenarios such as ventricular fibrillation, pulseless ventricular tachycardia, electromechanical dissociation, and ventricular asystole, adrenaline acts on α-receptors to significantly increase diastolic aortic pressure and coronary perfusion pressure, improving blood supply to the myocardium and brain tissue.
Meanwhile, it stimulates cardiac β₁-receptors to enhance myocardial contractility, accelerate heart rate, and increase cardiac output, facilitating the restoration of spontaneous circulation.In both in-hospital and pre-hospital emergency systems, standard-dose intravenous or intraosseous administration represents a key intervention to restore spontaneous heart rhythm and improve resuscitation success rates. For out-of-hospital cardiac arrest patients, early administration of adrenaline markedly improves short-term survival and neurological prognosis, making it an essential drug in emergency systems.
Severe allergic reactions and anaphylactic shock are rapid type I hypersensitivity responses that can cause laryngeal edema, bronchospasm, hypotensive shock, and circulatory failure within minutes, carrying extremely high mortality risk. Epinephrine hcl is the sole first-line emergency drug with no alternative.Its mechanisms include: stimulating α-receptors to constrict peripheral blood vessels, elevate blood pressure, and relieve plasma extravasation caused by vasodilation; activating β₂-receptors to rapidly relax bronchial smooth muscle and relieve airway spasm and dyspnea.
Inhibiting the release of histamine, leukotrienes, and other allergic mediators from mast cells and basophils, blocking the cascade amplification of allergic reactions.Clinically, intramuscular injection is the preferred route for anaphylactic shock induced by food, drugs, insect stings, latex, etc., with rapid onset to reverse shock. As an active pharmaceutical ingredient (API), epinephrine hcl powder is the core raw material for producing auto-injectors (EpiPen), enabling patients to carry and self-administer first aid, significantly reducing out-of-hospital sudden allergic deaths.
In refractory hypotension caused by septic shock, distributive shock, and other conditions, when fluid resuscitation and vasopressin are ineffective, epinephrine hcl can be used as a second-line vasoactive agent. Combining vasoconstrictive and positive inotropic effects, it increases mean arterial pressure while maintaining tissue perfusion, improving blood supply to vital organs.It is particularly suitable for shock patients complicated with myocardial depression and reduced cardiac output. By balancing α- and β-receptor agonism, it provides dual support for blood pressure and cardiac function, buying time for etiological treatment.
Applications in the Treatment of Respiratory Diseases
(1) Emergency Management of Acute Severe Bronchial Asthma
Acute severe bronchial asthma can lead to severe airway spasm, hypoxia, carbon dioxide retention, and even life-threatening conditions. By potently stimulating β₂-receptors on airway smooth muscle, epinephrine hcl rapidly relaxes bronchi, reduces airway resistance, alleviates airway mucosal hyperemia and edema, and improves ventilation.Compared with short-acting β₂-agonists, epinephrine hcl has a faster onset and stronger effect. It is indicated for critical asthma attacks unresponsive to conventional inhaled medications, quickly relieving wheezing, chest tightness, cyanosis, and creating conditions for subsequent treatment.
(2) Symptomatic Management of Acute Exacerbations of Chronic Obstructive Pulmonary Disease
During acute exacerbations of chronic obstructive pulmonary disease (COPD), some patients develop severe bronchospasm and respiratory failure with limited response to conventional bronchodilators. Short-term use of epinephrine hcl can relieve airway obstruction. Its vasoconstrictive effect reduces airway mucosal edema, corrects ventilation-perfusion mismatch, relieves dyspnea, and prevents rapid progression to respiratory failure.
Applications in Local Surgery and Anesthesia
(1) Enhancement and Prolongation of Local Anesthetics
Epinephrine hcl powder is often used as an adjuvant additive for local anesthesia, combined with lidocaine, bupivacaine, ropivacaine, and other local anesthetics. It strongly constricts local blood vessels to slow systemic absorption of local anesthetics, reducing the risk of local anesthetic toxicity while significantly prolonging anesthesia duration and enhancing analgesia.This application is widely adopted in small and medium-sized surgeries in stomatology, ophthalmology, plastic surgery, general surgery, etc., improving anesthesia safety and surgical comfort.
(2) Hemostasis for Surgical Wounds
In superficial surgeries involving the skin, mucous membranes, nasal cavity, and oral cavity, epinephrine hcl solution can be directly applied to wounds via wet dressing or spraying. By stimulating local vascular α-receptors, it rapidly constricts arterioles and capillaries, reducing intraoperative bleeding, maintaining a clear surgical field, and improving surgical efficiency.It is especially suitable for delicate procedures with heavy bleeding such as endoscopic nasal surgery, tooth extraction, and skin mass resection, providing rapid hemostasis with high safety.
(3) Assistance in Otorhinolaryngological and Airway Procedures
In airway procedures including laryngoscopy, tracheal intubation, and bronchoscopy, epinephrine hcl reduces pharyngeal mucosal hyperemia and edema, decreases bleeding and airway spasm caused by procedural irritation, improving success rates and reducing complication risks.For patients with epistaxis, epinephrine hcl cotton pads are a clinically common rapid hemostatic measure, particularly for active anterior nasal bleeding.
Professional Applications in Clinical Ophthalmology
(1) Assistance in Mydriatic Examinations and Fundus Angiography
Epinephrine hcl exerts a mydriatic effect by stimulating α-receptors of the pupillary dilator muscle in the eye, rapidly dilating the pupil for ophthalmic diagnostic procedures such as fundus examination, refractive examination, and fundus angiography. With rapid onset and reversible effects, it is one of the commonly used diagnostic tools in ophthalmology.
(2) Intraocular Pressure Reduction in Glaucoma
During acute attacks of angle-closure glaucoma, epinephrine hcl reduces intraocular pressure by decreasing aqueous humor production and promoting aqueous humor outflow, relieving acute symptoms such as eye pain, headache, and sudden vision loss.
It also improves ocular microcirculation, reduces optic nerve damage, and buys time for laser or surgical treatment.
(3) Hemostasis and Intraoperative Management in Ocular Surgeries
In intraocular surgeries including cataract, glaucoma, and retinal detachment surgeries, epinephrine hcl can be added to anterior chamber perfusate to constrict ocular blood vessels, reduce intraoperative bleeding, maintain a clear surgical field, stabilize pupil morphology, improve surgical precision, and lower intraoperative complications.
Applications in Dermatology and Mucosal Diseases
(1) Acute Symptomatic Treatment of Urticaria and Angioedema
For severe acute urticaria and extensive angioedema, especially involving the eyelids, lips, and throat, epinephrine hcl rapidly constricts blood vessels, relieves tissue edema, inhibits allergic mediator release, alleviates skin swelling and pruritus, and prevents progression to systemic anaphylaxis.
(2) Local Injection Therapy for Skin Lesions
In the treatment of keloids, hypertrophic scars, hemangiomas, and other skin diseases, combined local injection of epinephrine hcl with glucocorticoids constricts local blood vessels, prolongs drug retention, enhances efficacy, and reduces systemic absorption, representing a commonly used minimally invasive clinical regimen.
FAQ
What is epinephrine HCl used for?
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Epinephrine is a hormone and neurotransmitter used to treat allergic reactions, to
What is the new name for epinephrine?
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Adrenaline is also known as epinephrine, which is its international name. They are the same drug. Adrenaline acts quickly to reverse the symptoms of anaphylaxis. It opens up the airways by reducing swelling and raises blood pressure.
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