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October 22, 2024
Testosterone propionate powder is an organic substance with the chemical formula of C22H32O3. It is an androgen drug. White to off white crystalline powder, easily soluble in ethanol, ether, pyridine and other organic solvents, soluble in vegetable oil, insoluble in water. Clinically, it is suitable for testis, cryptorchidism and male hypogonadism; Gynecological diseases such as menorrhagia and hysteromyoma; Senile osteoporosis and aplastic anemia. Laboratory reagents are commonly used in scientific research experiments.
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| Chemical Formula | C22H32O3 |
| Exact Mass | 344.24 |
| Molecular Weight | 344.50 |
| m/z | 344.24 (100.0%), 345.24 (23.8%), 346.24 (2.7%) |
| Elemental Analysis | C, 76.70; H, 9.36; O, 13.93 |
Testosterone propionate powder, is a synthetic anabolic steroid that has a slower release profile compared to other testosterone esters. Its applications are diverse and span across various medical and therapeutic areas. Below is a detailed introduction to its applications:
Male Hormone Replacement Therapy:
Hypogonadism: Testosterone propionate is used to treat male hypogonadism, a condition characterized by low testosterone levels. This includes conditions such as andropause (male aging with decreased testosterone), Klinefelter syndrome, and other forms of primary or secondary testicular failure.
Sexual Dysfunction: It can also be prescribed for the treatment of sexual dysfunction in men, including decreased libido and erectile dysfunction, that are associated with low testosterone levels.
Anemia:
Testosterone propionate stimulates erythropoiesis (red blood cell production) through its action on the kidneys, increasing the production of erythropoietin. This makes it useful in treating anemia, particularly in cases where anemia is caused by a deficiency in endogenous testosterone production.
Bone Health:
It promotes bone density and strength by stimulating calcium and phosphorus absorption, which aids in the prevention and treatment of osteoporosis in men.
Muscle Mass and Strength:
In a therapeutic setting, testosterone propionate can help increase muscle mass and strength in individuals with muscle wasting conditions such as cachexia or those recovering from serious illnesses or injuries.
Dermatological Applications：
Skin Conditions: Testosterone propionate has been used to treat certain skin conditions in men, such as male pattern baldness, where it may stimulate hair growth. However, its primary dermatological use is in the treatment of skin disorders associated with low testosterone levels, like pruritus ani (itching around the anus) and certain forms of dermatitis.
Non-Medical Uses (Note: Illegal And Not Recommended)：
Testosterone propionate, like other anabolic steroids, has been abused by athletes and bodybuilders to enhance muscle mass, strength, and performance. However, its use for non-medical purposes is illegal and can lead to severe side effects, including but not limited to cardiovascular complications, liver damage, and psychiatric disorders.
Dosage and Administration
Dosage
The dosage of testosterone propionate varies depending on the individual's condition and response to treatment. Typical intramuscular doses range from 25 to 50 mg every 2 to 3 days.
Administration
It is administered intramuscularly, usually in the gluteal or deltoid muscle. The slow release profile of testosterone propionate allows for less frequent injections compared to some other testosterone esters.
Identification method
Take about 5mg of testosterone propionate powder, put it into a small test tube, add 0.2ml of methanol to dissolve it, add about 3mg of fine powder of sodium nitroferricyanide, about 50mg of sodium carbonate and ammonium acetate respectively, shake it well, place it for 10 to 30 minutes, and it should appear blue and purple. Take about 0.5mg of this product, put it into a small test tube, add about 1mg of isoniazid and 1ml of methanol to dissolve it, add 1 drop of dilute hydrochloric acid, and it will turn yellow. The infrared absorption spectrum of this product should be consistent with the control spectrum (spectrum set 434 figure). Chromatographic conditions and system suitability test use octadecyl silane bonded silica gel as filler; Methanol water (65:35) is the mobile phase; The detection wavelength is 254nm.
The number of theoretical plates calculated according to the progesterone peak should not be less than 1000, and the resolution of the progesterone peak and the internal standard substance peak should meet the requirements. Preparation of internal standard solution Take about 25mg of diethylstilbestrol, weigh it accurately, put it into a 25ml volumetric flask, dissolve it in methanol, dilute it to the scale, and shake it up. Determination method Take about 25mg of the product, weigh it accurately, put it into a 25ml measuring flask, dissolve it in methanol, dilute it to the scale, and shake it up; Accurately measure 5ml of the solution and 5ml of the internal standard solution, place them in a 25ml volumetric flask, dilute them to the scale with methanol, shake them up, and take 5 μ L Inject the liquid chromatograph and record the chromatogram; Take an appropriate amount of progesterone reference substance and determine it by the same method. Calculate by peak area according to internal standard method.
Adverse reaction
17- α Alkyl substituted testosterone is toxic to the liver and can cause jaundice. Long term use in female patients may cause masculinity such as acne, hirsutism, rough voice, and sexual desire change. When liver dysfunction and feminization are found, the drug should be stopped immediately. Large dosage can cause feminization, edema, liver damage, jaundice, dizziness, etc.
Those with allergic reaction should stop taking the medicine immediately. Do not use it for patients with liver and kidney dysfunction, prostate cancer and pregnant women. If there is crystal precipitation in the injection, it can be heated and dissolved before injection. Prohibited for pregnant and lactating women and prostate cancer patients; During the course of medication, the liver function should be checked regularly. If there is liver damage, the drug should be reduced or stopped; The dosage should be reduced for children before puberty, and the bone age should be measured every 6 months.
In the esterification reaction, Testosterone Propionate acts as a catalyst, and the mechanism of action is as follows:
1. Main reactions:
Testosterone Proposition is involved in the esterification reaction between alcohols and acids. This reaction occurs at 17% of the testosterone molecule β On the hydroxyl group. Specifically, the propionate group in Testosterone Propionate undergoes esterification reaction with 17 β The hydroxyl groups at the position combine to form ester bonds.
2. Catalyst function:
Testosterone Proposition plays a catalytic role in esterification reactions. It provides a catalytic surface that makes it easier for alcohol and acid molecules to react with each other. By reducing the activation energy of the reaction, Testosterone Propionate promotes the esterification reaction.
3. Reaction conditions:
Esterification reactions usually need to be carried out under certain conditions, including appropriate temperature, reactant concentration, and solvent selection. Testosterone Propionate, as a catalyst, can promote esterification reactions under mild reaction conditions.
In summary, the mechanism of action of Testosterone Propionate in esterification reaction is through the interaction between its propionate ester group and testosterone molecule β Hydroxyl groups undergo esterification reaction, forming ester bonds. In this process, Testosterone Propionate acts as a catalyst, reducing the activation energy of the reaction and promoting the esterification reaction.
Frequently Asked Questions
What is the main function of its "propionic acid" group?
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Mainly used as a prodrug modification, by esterifying the 17 β - hydroxyl group of testosterone molecules to increase their lipid solubility, making them suitable for making oil injections, thereby extending the action time of a single dose to 2-4 days.
Why does the solubility characteristic of its powder determine that it cannot be made into an oral dosage form?
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As an 'organic compound', it is insoluble in water and only slightly soluble in vegetable oils. More importantly, after oral administration, it will first be rapidly metabolized and destroyed by the liver, leading to failure.
What is the core mechanism by which it functions in the treatment of aplastic anemia?
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This application is quite unique, as its core mechanism is not direct androgenic action, but rather by stimulating the secretion of erythropoietin by the kidneys or directly stimulating bone marrow hematopoiesis, thereby promoting the generation and differentiation of red blood cells.
As a 'prodrug', how is it activated and ultimately metabolized in the body?
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As a prodrug, it is first hydrolyzed into active testosterone after injection into the body. Testosterone is then converted into more active dihydrotestosterone by 5 α - reductase in the target tissue, and ultimately metabolized into products such as androsterone, which are mainly excreted through urine and bile.
Why should the synthesis process of its raw material powder avoid using solvents such as pyridine?
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The traditional process of using pyridine generates a large amount of highly polluting phosphorus containing wastewater. Modern green synthesis methods aim to replace other solvents and catalytic systems to reduce environmental pollution, lower costs, and achieve high yields.
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