Phthalates are esters of phthalic acid that are groups of chemicals used mainly in the production of plastics. Phthalates are also called plasticizers and they make solid plastics flexible and soft. Besides plastics, phthalates are also used as raw materials and/or auxiliary chemicals in many industrial activities. Because of their widespread use, phthalates are very common in nature and are classified as non-persistent pollutants. Their harmful effects have started to be shown by studies conducted in the last 20-30 years which revealed that phthalates have endocrine disrupting effects, among other health consequences. This book deals with the various health and environmental effects of phthalates.