Classifications of Chemical Auxiliaries: i) Permanent or Temporary auxiliaries 

ii) Nature of auxiliaries (Surface active/non surface active/soluble/dispersing or emulsifying) 

i) Permanent or Temporary auxiliaries: 

Chemicals which are never remain with textile materials and need to be removed after processing come under Temporary auxiliaries. Examples of these chemicals are sizing chemicals, enzymes, detergents, wetting agents, leveling agents, carriers, dispersing agents, thickeners etc.

In case of permanent auxiliaries the chemicals which permanently fix on the textiles like softeners, water proofing agent, flame retardant chemicals, water repellent chemicals, rot proofing agents, binders, dye fixing agents etc.

ii) Nature of auxiliaries (Surface active/non surface active/soluble/dispersing or emulsifying/Inorganic chemicals) 

a) Surface active agents are those which act on the surface first and then react with the textiles. These are detergents, softeners, wetting agents, water repellent agent, emulsifier, dispersing agents, dyeing assistant etc

b) Non surface active agents are those which mostly not react with the textiles and remain only on the surface. Examples of these are resin, cross linking agents, sizing chemicals, thickener, binder etc.

c) There are some chemical auxiliaries which have non surface active with small amount of surface active agents properties. These are wax emulsions, silicone emulsion, spin finish oils etc.

d) Inorganic chemicals are reducing agents, acids like acetic acid, buffers to maintain pH, bleaching agents, mordants, oxidizing agents, hydrolyzing agents etc