Classification, Chemistry, and Applications of Chemical Substances That Are Harmful to the Environment

Abstract

A detailed classification of dyes has been discussed along with their chemical class and chemistry. International, regional, and national classification and labeling systems are already established and tested in practice. These hazardous chemicals can be liquid, solid, gas, aerosol, mists, vapors, semisolid, etc. Hazardous chemicals have wide applications (e.g., dyes, which are used for coloring purpose; pesticides, which are used for pest control; fertilizers are an essential part of the agriculture system; plastic and plastic waste; and e-waste to name a few). In this chapter, the authors deal with the identity, classification, and application of these harmful chemicals, especially dyes, which are mandatory to use. More emphasis is given to the natural and synthesized dyes about their use along with their modrants, which are a necessary part of the dyes without which they can't exhibit colors. Dyes have wide variety of applications, which have also been discussed along with their various harmful effects on environment, mankind, and aquatic life.