This book will be of great use for young scientists who are doing research in the field of phthalocyanines, dyestuffs, colorants etc., Phthalocyanines are the second most important class of colorant and copper phthalocyanine is the single largest volume colorant sold. Phthalocyanines have been important industrial dyes and pigments since their early syntheses at the beginning of last century. They have been employed as charge carriers in photocopiers and laser printers, as well as materials for optical storage in recent years. Many potential applications are expected for these molecular materials which have a high thermal and chemical stability, for instance as potential industrial catalysts, solar cell functioning materials, as power leads and as molecular switches in nanotechnology, photodynamic therapy agents, antiscapie treatments, antimycotic materials, antimicrobial agents. The book is comprising of 5 chapters. Chapters 1 gives the general introduction. Chapters 2 explains the methods of preparation. Chapter 3 explains the electronic structure of the compounds. Chapter 4 speaks about magnetic properties. Chapter 5 gives an idea about X-ray patterns and Thermal stabilities.