Azo dyes

INTRODUCTION Dyes exist in natural and synthetic forms in the world; they are used for the purpose of changing colors of different materials. William Perkins first discovered the azo dye on accident after adding alcohol to a product in the lab. They have the ability to do this due to the molecules of the dyes possessing conjugation. Conjugation is defined as p-orbitals overlapping which causes the electrons within to be delocalized; it is also seen in molecules and compounds that contain alternating double bonds. Systems that possess conjugation absorb energy in the ultraviolet-visible region of the spectrum to cause excitement of electrons and the transitions. When the electrons get excited, they jump from lower energy levels, to an excited…

Tartrazine Tartrazine is a chemical that contains numerous positive and negative effects. It is a lemon yellow azo dye mainly used as a food coloring. It has no taste, but s commonly used in foods we eat. Tartrazine’s chemical symbol is C16H9N4Na3a2. The molar mass of Tartrazine is 534.3g/mol. Also, Tartrazine’s melting point is 300 c. It is often used in bakeries on frosting and other pastries to add a splash of color into it. It is extensively used for a variety of different products. But, if…

Problem Statement Industries are generated waste water, which contain dyes and pigments in waste water. Characteristically high in colour and organic content (Grag, et al., 2004). Dyes are widely used in industries such as textile, rubber, paper, plastic, and cosmetic. There are many of dyes exist in industries and one of them is methyl red and through nano zerovalent iron removal of dyes from waste water. Dye industry effluents constitute one of the most problematic wastewaters to be treated…

concentration of Blue Dye 1 in Cool Blue Gatorade. In today's society most people are health conscious and food coloring and dyes have been a controversial topic. Blue Dye 1 is one of the most popular FDA-approved dyes used in food such as fruits, sauces, and baking mixes. Such dyes are not limited to foods but also used in shampoos, detergents, and vitamins just to name a few (Hennessey). There have been many studies pointing to the fact that dyes are toxic, carcinogens and contributors to…

How Food Dyes Can Affect Your Health Have you ever wondered how the ingredients like artificial color and dyes in your food could affect your health? There are thing in our diet that can cause us health problems. Food dyes are linked to health problems in many people. You may be asking yourself what are food dyes. Food dyes are a mix of chemicals to add color to food. Food dyes are linked to ADHD. For more than thirty years scientists have studied how food dyes is linked to ADHD (“Food Dye”).…

Determining Food Dye Content Lab was to identify the food dye coloring in green apple Gatorade, and determine the dye’s concentration to ultimately recreate a solution containing the same concentration of dyes as the original. To determine the concentration of the dyes present in the green apple Gatorade, a spectrometer was used to measure the wavelengths and absorbance values for the given dyes. A sample of the green apple Gatorade was tested in the spectrometer to measure its absorption and…

the time period given. Aim My aim for this project is to find out if dye in candles can affect the speed rate they burn in. I will test one white candle with a high dye pigmentation candle such as blue or purple against white. Then I will measure…

formaldehyde. There are many questions about hair dye causing cancer. Concern about cancer risk is largely limited to the semi-permanent and permanent dyes. Because darker dyes have more of some chemicals that may cause cancer, these products are of greatest potential concern. There are three main types of cancer that can be caused when using these products. Bladder cancer, most studies of people exposed to hair dyes at work, such as hairdressers and barbers, have found a small but fairly…

If you got some dye on your carpet while you where coloring your hair, do not fret. If you act quickly, you can get the stain out of your carpet and save your carpet from forever being the same color as your hair. Blot Up The Hair Dye The first thing you need to do is grab a clean washcloth and blot the dye. When you blot the dye, you take the washcloth and gently dap the area, without pressing down too hard. The purpose of doing this is to absorb as much of the hair dye as you can before it…

made use of two reactions in synthesizing 1-phenylazo-2-naphtol, also known as Sudan-1. The first is the diazotization reaction in which a diazonium salt is formed from the conversion of primary aromatic amines, such as aniline, to compounds with the nitroso functional group using a nitrous acid, such as HNO2. The diazonium salt was then used as an electrophile in a coupling reaction with an aromatic compound, β-naphthol. Recrystallization was conducted and yielded 0.18 g of a red-orange…