Abstract: Concentrated cleaning compositions are described which exhibit an increase in viscosity simply upon dilution with water. The concentrated and diluted ("ready-to-use") versions are useful in removing food and petroleum grease from hard surfaces (particularly non-horizontal surfaces), and may be formulated as petroleum degreasers, hand soaps and bathroom cleaners. The inventive compositions include an aggregate-forming organic compound, for example an amine oxide, and a nonaggregating or mildly aggregating organic compound, such as an organic alkyl alcohol having from about 4 to about 20 carbon atoms.

Abstract: Cleaning compositions are presented which surprising exhibit increased cleaning performance as the amount of solubilizing coupler is increased beyond that necessary to fully solubilize a very slightly water-soluble organic solvent component. Methods of use of the compositions to remove hydrophobic soils and soap scum are also described.

Abstract: An article for testing liquid for free fatty acid comprises a substantially nonreactive, neutral and non-buffering, porous, absorbant support material having at least one portion thereof which contains a composition comprising an effective amount of acid-base indicator capable of changing color, when the predetermined amount of base has reacted with the known amount of free fatty acid, in a pH range on the order of 6-10, a predetermined amount of base compound reactive with free fatty acid and being present in an amount equivalent to a known concentration of free fatty acid, and about 30-99.5 parts by weight of non-volatile material of a substantially colorless, substantially neutral, humectant polyalkylene glycol organic solvent which is substantially non-volatile under ambient conditions. An organic liquid to be tested is contacted with the article and any color change in the article after the passage of sufficient time is observed.