Dye lab - Introduction In this lab we will be synthesizing...

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Introduction In this lab we will be synthesizing the azo dye, methyl orange, to test its dyeing properties on different kinds of fabrics. Since dyes are used for many things in the world such as food and fabric dyes, it is important to see the effect they have when put on various fabrics and why they are different. It will also be used to test it as a pH indicator and to demonstrate the color bleaching process. Substance MW MP BP d Safety Considerations sodium carbonate 105.9 9 851 NA 2.5 sulfanilic acid 173.1 9 288 NA 1.49 irritation to skin, eyes and respiratory system sodium nitrite 69 270 320 2.2 hydrogen chloride 36.46 - 114 -85 1.47 7 N,N- dimethylaniline 121.1 8 2.4 5 194 4.17 very hazardous acetic acid 66.05 16. 5 118 1.04 9 corrosive, flammable NaOH 39.99 318 139 0 2.1 cause chemical burns, blindness, scarring NaCl 58.44 2 801 146 5 2.16 Procedure See lab notebook Calculations Percent Yield: .456/ .86 x 100= 53% Results Fabric Color After Dye spun diacetate yellow bleached cotton light pink spun polyamide orange
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This note was uploaded on 04/03/2008 for the course CHEM 243A taught by Professor Bharadwaj during the Fall '08 term at University of Arizona- Tucson.

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Dye lab - Introduction In this lab we will be synthesizing...

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