Safety Precautions for Synthesis of Acetic Anhydride Acetic Anhydride Acetic anhydride is an irritant and also flammable‚ therefore gloves and goggles should be worn at all times during the experiment. It is reactive to water‚ so in the case of fire‚ alcohol foam or carbon dioxide is preferred to use as an extinguisher. This chemical has harmful fumes and use of a fume hood is strongly recommended. Sulphuric and Salicylic Acid These acids may irritate the skin in high concentrations. Take
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15. Benzene and Aromaticity • C-Phen DM Drops (Chlorpheniramine/Dextromethorp/Phenylephrine) • This combination medication is used to treat symptoms caused by the common cold‚ flu‚ allergies‚ hay fever‚ or other breathing illnesses (e.g.‚ sinusitis‚bronchitis). • One of the active ingredients is Phenylephrine –a decongestant that helps relieve stuffy nose symptoms. H HO OH H N CH3 . HCl What is the configuration at this chirality center? R or S ? www.primaryrx.com/pdf/C-PHEN%20DM%20DROPS
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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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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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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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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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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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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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