The book is destined to satisfy the challenging requirements of students and researchers for separation and estimation of molybdenum. In this book we have tried to give balanced, coherent and comprehensive account of the chemistry of element molybdenum, its separation and estimation. Accordingly, the book is deal not only with molybdenum chemistry but also those aspects which covers advanced separation techniques and estimation techniques. The book is directed towards advanced students of chemistry-graduates and researchers who have a special interest in separation and estimation of elements. The subject matter is distributed over 4 mutually independent chapters in such a way as to encourage individual study. Each chapter begins with a brief introduction. This is followed by brief description of topic and at last references for further study. Chapter 1 deals with element molybdenum, its brief description. Chapter 2 gives various advanced separation techniques for separation of molybdenium. Chapter 3 is on various estimation techniques of molybdenum element. Chapter 4 is main chapter which is on new method developed by authors for separation and estimation of molybdenum.