Conclusions 1. The oven drying method for the determination of water in sodium alkyl aryl sulfonates results in incomplete removal of water and may result in the loss of unsulfonated oil and other volatile products. 2. The determination of water in sodium alkyl aryl sulfonates by desiccation over concentrated sulfuric acid results in incomplete removal of the water. 3. The determination of water in sodium alkyl aryl sulfonates by azeotropic distillation and subsequent measurement of the water distilled is not recommended because of the operational difficulties and lack of sufficient accuracy. 4. The azeotropic distillation of Suter (6) is applicable for the determination of water in sodium alkyl aryl sulfonates, but comparable results may be determined more readily by the proposed Karl Fischer method. 5. The determination of water in sodium alkyl aryl sulfonates by the Karl Fischer method is the most satisfactory of the methods investigated.

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Products AbstractThe increasing use of active chlorinecontaining compounds in machine dishwashing has led to the need for chlorine-stable, low foaming detergent formulations. To avoid oxidative degradation of nonionie surfactant and simultaneous loss of available chlorine, a new basic formulation process has been devised. This obviates the need for modifying nonionie surfactants. The process requires a preferred order of addition and the use of tetrasodium pyrophosphate builder as an integral part of the composition. The detergent product is free-flowing, granular, readily soluble and exhibits no tendeney to cake on storage. A suggested machine dishwashing formulation is given, and data are presented which show good chlorine stability and exeellent dishwashing performance.

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