The “ASTM D770-11 Standard Specification for Isopropyl Alcohol” standard developed by the American Society for Testing and Materials (ASTM) covers isopropyl alcohol with a purity of 99 percent. The following rule applies to all limits specified in this standard: For the purpose of determining compliance with this standard, an observed value or a calculated value shall be rounded to the “nearest unit” in the last digit on the right used to express the specification limit in accordance with the rounding method described in “ASTM E29-22 Standard Practice for Using Significant Figures in Test Data to Determine Compliance with Specifications”.
In this standard, the requirements for isopropyl alcohol are described on the following basis:
Samples must be properly sampled and tested and must conform to the specified values of these properties.
Isopropyl alcohol is used in antifreeze products, as a solvent for chewing gum, shellac, and essential oils, and in quick-drying inks and lubricants. It can also be found in body lotions, hand lotions, aftershave lotions, cosmetics, and pharmaceuticals. It is used in the manufacture of acetone, glycerol, and isopropyl acetate. It is also widely used in medicine as a skin and instrumentation antiseptic.
In short, 99 percent isopropyl alcohol is a general purpose cleaning and degreasing solvent for many applications. This product's fast evaporation rate helps remove grease, oil, dust and dirt. It is typically used for wiping, rinsing or spray applications. It is excellent for parts cleaning and paint prep.
Isopropyl alcohol is a high purity cleaner and solvent. Its purity level meets the Class A standard for “MIL Spec TT-I-770A Federal specification: isopropyl alcohol”, a military standard developed by the U.S. Department of Defense in conjunction with ASTM D11-735, ensuring that no contamination will occur from its use.
As a cleaner, it is completely miscible with water and most organic liquids, making it good at dissolving dirt, mild organic contaminants, and ionic flux residues. Being extremely anhydrous and hygroscopic (absorbs moisture), it easily removes water from surfaces and traps the water in an isopropyl alcohol solution as an azeotropic mixture. This helps to remove moisture from surfaces.
As a solvent, it acts as a moderately volatile, plastic-safe diluent and is used to improve the properties of paint resins and other heterogeneous solid mixtures. It is therefore a useful carrier solvent for adjusting the rheological properties and compatibilities of complex compounds. Due to the volatility of isopropyl alcohol, it resists retention in coatings. As it dries, it gives off a very faint odor that is not offensive but acts as a cue to limit overexposure due to inadequate ventilation.
Isopropyl alcohol is used extensively in the electronics industry because it is safe for most plastics, gaskets, ceramics, and printed circuit board components. It is great for cleaning screens, stencils, fiber optics, cables, keypads, printed circuit board components, or electrical contacts and connectors. It is also used to remove oxides and dirt from audio or video tape heads. It effectively removes light greases, oils, and flux without adding additional residue to contacts, relays, and circuit board connectors. It dries quickly compared to water. It can also be used to wash off more aggressive organic solvents such as acetone or toluene.
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