Fillers, detergent compound

Fillers Compounds such as sodium sulfate (Na2S04) are added to give the detergent bulk and to keep it free-flowing. 

In addition to all of these components, a modern commercial detergent may also contain antistatic agents (cationic surfactants added to reduce static cling) hydro-tropes (compounds added to liquid detergents to hold less-soluble surfactants and other compounds in solution) and, of course, fragrances and perfumes and inert fillers and formulation aids that keep powdered detergents free flowing. 

In the case of non-black compounds, particular precautions should be taken in the choice of mineral fillers, avoiding those which could be attacked by detergents. 

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