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“nPB” is an abbreviation for “Normal Propyl Bromide” or “1-bromo-propane” indicated by the CAS #106-94-5 on Safety Data Sheets. It replaced ozone depleting Freon and 1-1-1 Trichloroethane.It is a relatively inexpensive, nonflammable, versatile chemical that removes many types of contamination, such as oils, grease and fluxes. It was formerly used in aerosol cleaners, but due to environmental restirctions,…
Viscosity is a chemical characteristic that describes a fluids ability to flow quickly, smoothly and without outside effort. It is an indirect measure of the molecular attraction within a fluid for itself; highly viscous fluids are strongly attracted to their own molecules and resist separation.In terms of critical cleaning, highly viscous fluids are not very good cleaners…
Fluid mechanics is the study of how fluids move, and one of the most important parameters of fluids is their viscosity. Most people think of “viscosity” in terms of a fluid’s ability to flow. Chemists have a slightly different feel for the phenomenon; viscosity is defined as its resistance to gradual deformation. This corresponds to…
nPB is an abbreviation for “Normal Propyl Bromide” or “1-bromo-propane” indicated by the CAS #106-94-5 on Safety Data Sheets. This nonflammable fluid is a powerful cleaner with a low global warming potential. It is used as an alternative to CFC-113, methyl chloroform, hydrochlorofluorocarbons (HCFCs) and perfluorocarbons (PFCs) in many critical cleaning, drying, carrier fluid and…
Volatile Organic Compounds (VOCs) are a source of worry because they contribute to low-altitude smog in cities. Obviously, the most common VOC is gasoline, but that is not a regulated solvent so the VOC question never comes up. However, in some regions such as Southern California the government is regulating VOC content in many products,…
Most people are familiar with the basic process of cleaning: a solvent dissolves the oil, grease, flux or some other contamination and then the contamination is rinsed away. The key is dissolving: just like sugar “dissappears” in warm water, solvents need to dissolve most contamination to remove it.However, sometimes the contamination cannot be dissolved. In…