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Anonymous users2024-02-16Aspirin. Synonyms: 2-acetyl.
Benzoic acid; acesalicylic acid; Aspirin. 2-acetoxybenzoicacid；o-acetylsalicylicacid；asa；aspirin
Molecular formula: C9H8O4
Molecular Weight: CAS: 50-78-2
Appearance: White crystalline powder.
Characteristics: Purity: 99
Melting Point: 134-136
Solubility. Soluble in ethanol.
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Anonymous users2024-02-15It is introduced because acetylsalicylic acid is easily hydrolyzed.
When taking small doses (less than 1 g) of acetylsalicylic acid orally, its metabolism is carried out according to first-order kinetics with a half-life of about 2 to 3 hours. When the dosage is 1g, its metabolic mode changes to zero-order kinetics, and the half-life is extended to 15 to 30 hours, if the dose is increased again, salicylic acid poisoning can occur. Therefore, when a large number of rheumatoid and rheumatoid arthritis are used for a long time, it is best to monitor the blood drug concentration to determine the dose and interval of administration.
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Anonymous users2024-02-14Aspirin, alias: 2-acetylbenzoic acid; acesalicylic acid; Aspirin. 2-acetoxybenzoic acid；
o-acetylsalicylic acid；asa；Aspirin Molecular Formula: C9H8O4 Molecular Weight:
cas＃：50-78-2
Appearance: White crystalline powder.
Characteristics: Purity: 99 Melting Point: 134-136 Solubility: Soluble in ethanol, reference concentration 50mg ml, 37 solubility in water is 10mg ml, 25 is 3mg ml.
r：22-36/37/38 s：26
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Anonymous users2024-02-13Melting Point: Conventional melting point between 136-140.
Boiling point:. Specific gravity: Depending on the aspirin tablet, the specific gravity is also different, and it needs to be analyzed according to the situation.
Solubility: g l(20). Slightly soluble in water, soluble in ethanol, ether, chloroform, also soluble in a strong alkaline solution, and decompose at the same time.
Properties of aspirin: white needle-like or plate-like crystalline or crystalline powder. Odorless, slightly sour. Molecular Relative Mass:.
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Anonymous users2024-02-12Aspirin.
Melting Point: 135
Boiling Point: 140 decomposition).
Density: g cm
Solubility:. Soluble in ethanol, ether and chloroform, slightly soluble in water, soluble in alkali hydroxide solution or carbonate alkali solution, but decompose at the same time. 1g of this product can be dissolved in 300ml of water, 5ml of alcohol, 10-15ml ether or 17ml of chloroform.
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Anonymous users2024-02-11It could have been completely dissolved, but some of them have a small film on the outside, which is completely invisible like plastic paper, and it is good to scratch it with **.
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Anonymous users2024-02-10Good evening, Aspirin is the English translation of acetylsalicylic acid, and its essential molecular structure is a polycarboxylic acid with an acyl group, which is an acylation product of salicylic acid. Since it has 9 carbon atoms in its molecule, it is no longer possible to break down its energy barrier by relying solely on the energy level of water - water solubility follows this characteristic in most organic matter, and as the carbon chain grows, the polarity decreases, and the hydrophilicity soluble in water and other polar organic solvents also decreases. SCA (salicylic acid) is a fat-soluble acid, and acetylsalicylic acid can improve its microsolubility after acetylation compared with the upstream raw materials.
There are many similarities, such as stearic acid, sorbic acid, catechic acid and gallic acid, etc., which are insoluble in cold water, please refer to it.
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Anonymous users2024-02-09The chemical name of Aspirin is acetylsalicylic acid, and the chemical name of salicylic acid is o-hydroxybenzoic acid, there is a carboxyl group and phenolic hydroxyl group on the benzene ring, the so-called acetylsalicylic acid is an acetyl bar hydroxyl group on the hydrogen substitution, from the structural point of view, the acetyl group and carboxyl group are hydrophobic groups, so it is insoluble in water.
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