Synopsis Emulsifier is an organic compound that encompasses in the same molecule two dissimilar structural groups e.g. a water soluble and a water insoluble moiety. The composition, solubility properties, location and relative sizes of these dissimilar groups in relation to the over all molecular configuration determine the surface activity of a compound. Emulsifiers are classified on the basis of their hydrophilic or solubilizing groups in to four categories – anionics, non-ionics, cationics, and amphoterics. The present book contains manufacturing processes of various types of emulsifiers which have applications in different industries. This is a book for scientists, technologists, entrepreneurs and ingredients suppliers.