Importance of colloidal dispersion in pharmacy Pharmaceutical Applications of colloids: Colloids are extensively used for modifying the properties of pharmaceutical agents. The most common property that is affected is the solubility of a drug .However‚ colloidal forms of many drugs exhibits substantially different properties when compared with traditional forms of these drugs. Certain medicinals have been found to possess unusual or increased therapeutic properties when formulated in the colloidal
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Abstract Qualitative analysis‚ a branch of analytical chemistry‚ deals with the identity of a substance found in a given sample‚ and not the amount of substance in it. It only concerns the substances present or absent in a given sample. Qualitative analysis is therefore used to determine unknown ions present in chemical samples by observing and analyzing results from various reactions of the sample with chemicals. Qualitative analysis is done through a series of steps. It is usually divided
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Analysis of Hydrocarbons Myra Gurango‚ Geneva Guy‚ Micah Hernandez* and Joyce Lagarde Department of Chemistry‚ University of Santo Tomas‚ Manila‚ Philippines Abstract The organic compounds hexane‚ toluene‚ cyclohexene and naphthalene in hexene were subjected to parallel chemical testing to differentiate their intrinsic physical properties in terms of structure and behavior. The physical state and color were noted by simple physical observation. Nitration Testing was conducted for preliminary
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tetraiodide were calculated. Recrystallization is to further improve the purity of tin tetraiodide. The solvent is carefully chosen to be toluene in order to maximize the recovery of tin tetraiodide during recrystallization. Experimental method1 Approximately 2.50g iodide and 1.01g tin were weighed on a balance and were placed in an Erlenmeyer flask. Approximately 10ml toluene was added to the flask. The mixture was heated on a hot plate at almost boiling temperature and was stirred using a stirring rod
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Synthesis of Aspirin Learning Goals 1. To synthesize aspirin from salicylic acid and acetic anhydride. 2. To purify the crude product by Recrystallization. Introduction Most drugs are chemical compounds which are described as "organic compounds" because they are comprised primarily of the elements carbon‚ hydrogen and oxygen. The present experiment will be the synthesis of a familiar organic compound called aspirin. The common chemical name is acetylsalicylic acid. Aspirin‚ the
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of aniline and acetic anhydride. b) To purify acetanilide by crystallization method from water c) Purity check by melting range Equipment / Materials and Hazars: hot plate beakers(150‚250mL) ice stirring rod spatula Büchner funnel aniline weighing paper digital scales rubber tubing (hose) acetic anhydride filter paper
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mucous membranes of the mouth and stomach.Then‚ in 1893 a chemist named Felix Hoffman synthesized acetylsalicylic acid. The purpose of this experiment is to synthesize aspirin from salicylic acid and acetic anhydride. To filter and air dry to find the actual
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2012 Name: Cristhian Valor Organic Laboratory Pre-Lab 1. Main reaction sequence including side reaction products: 2. 3 Sentence Summary of the Experiment: The OH group on the benzene ring in salicyclic acid reacts with acetic anhydride to form an ester functional group. Thus the formation of acetylsalicyclic acid (aspirin) is referred to as an esterification reaction‚ which requires the presence of H+ (H2SO4 in our case). The technique used to purify the aspirin content is called
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Introduction: Commonly used as Aspirin‚ acetylsalicylic acid is an analgesic (pain reliever)‚ which is one of the products of the esterification reaction between salicylic acid and acetic anhydride. This esterification occurs since the hydroxyl group from the salicylic acid reacts with acetic anhydride to form an ester. In this experiment‚ we will be able to recreate this acid catalyzed reaction‚ using sulfuric acid as our catalyst in order to produce acetylsalicylic acid and acetic acid. The
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Purpose: To synthesize acetylsalicylic acid on a microscale basis. Equipment / Materials: |salicylic acid |filter paper | | |acetic anhydride |hot water | | |conc. phosphoric acid |ice
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