This specification covers a stable, noncorrosive, water-soluble, highly-penetrating, fluorescent solution which may, but need not, be diluted with an appropriate amount of water for use.

This product has been used typically for use in fluorescent penetrant inspection of parts and assemblies for detection of surface discontinuities and imperfections, particularly on parts, such as those in oxygen systems, which must not be exposed to oils, but usage is not limited to such applications.