D&C 14-Methyl Orange

D&C 14-Methyl Orange - Discussion 14: Preparation...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Discussion 14: Preparation of Methyl Orange 1. There are many types of dyes and through out history, people have used many means to produce or make these dyes. The first source for dyes was plants, which were very successful because of their abundance. After plants, people started making dyes synthetically instead of extracting them from roots and animals, and these types of dyes were called triphenlmethyl dyes and they were synthesized by the chemist William H. Perkin. The third and final types of dyes are the azo dyes. These types of dyes are most commonly used today. They are called azo dyes because they contain a double bond between two nitrogen atoms (N=N). a. Plant-here are some examples of dyes that are extracted from plants i. Alizarin is a historically important anthraquinone compound that is derived from a madder plant and is used as a dye. ii. Henna or hina is a plant that produces a red or burgundy dye. This dye bonds well with protein so it is used to dye hair, skin, fingernails, silk, wool, and leather. iii. Indigo dye that is light blue to navy and is obtained from the indigo plant and has been used for many years in Asia. b. Triphenylmethyl i. Pararosaniline is a magenta dye which is the only basic fuchsine component. ii. Malachite green is a chemical that is toxic which is primarily used as dye. iii. Crystal violet also known as methyl violet is used in Gram Staining to identify
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

D&C 14-Methyl Orange - Discussion 14: Preparation...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online