methyl orange - Morgan Bailey Mb33295 Methyl Orange...

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Morgan Bailey Mb33295 Methyl Orange Discussion In this laboratory period, we synthesized a dye known as methyl orange. Dyes are used for a variety of things and us as humans have been using them since prehistoric ages. Methyl Orange is an azo dye, which today is the most common dye and it is formed through a complicated process which I will describe. These types of dyes are created by reacting aryl diazonium salts and phenols. They contain nitrogen-nitrogen doubles bonds, which could also be called an azo group. The nitrous acid reacts with amine to make a salt known as aryl diazonium. This process is called diazotization. The amine is then put on the salt in a reaction known as diazonium coupling. Methyl Orange can be used, and frequently is, as an acid-base indicator. N,N-dimethyl aniline and sulfanilic acid are our starting materials and we formed an initial product which is called helianthin and after the addition of sodium hydroxide we formed our methyl orange dye. We started out this experiment by adding 1.25 mL of water to 120 mg of
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This note was uploaded on 01/23/2012 for the course CH 210C taught by Professor Fetland during the Spring '07 term at University of Texas.

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methyl orange - Morgan Bailey Mb33295 Methyl Orange...

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