Surfactants or Surface active agents are group of products that find application in manufacturing of goods, Agro to Aviation.
Surfactants activate, agglomorate, alter, absorb,disperse, lubricate, modify, move, settle, solubalise, increase or decrease viscosity, soften, wet, repell and many more functions.
Small addition of surfactants can totally change the character of a product to suit an application.
Like wise, Preservatives, Biocides are also additives that find many application, more particularly in formulations wherever water is present.