This International Standard specifies methods of analysis of technical alkane sulfonates. It covers the following determinations: — measurement of pH; — determination of water content; — determination of free alkali or free acid; — determination of matter extractable by light petroleum; — determination of total alkane sulfonate content; — determination of alkane monosulfonate content; — determination of sulfite content; — determination of sulfate content; — determination of chloride content. It also sets out, in annexes : A : a general scheme of analysis; B : a method for the determination of total salts content. This International Standard is applicable to technical alkane sulfonates in powder, paste or liquid form, free from any products extraneous to their manufacture.