Isopropyl Alcohol (IPA) is a colorless, flammable liquid with a strong odor. While often associated with first-aid uses, the highly concentrated 99% grade is sought after for its exceptional purity and solvent capabilities. This ultra-pure form of IPA is a staple in various specialized fields, from cleaning sensitive electronics to laboratory procedures. Finding this specific concentration requires looking beyond common household products toward suppliers catering to industrial or professional needs.
Differentiating 99% IPA from Standard Rubbing Alcohol
The most common “rubbing alcohol” found in drugstores is typically 70% isopropyl alcohol, with the remaining 30% being purified water. This water content is scientifically included to make the alcohol a more effective disinfectant. The water acts as a catalyst, slowing evaporation and allowing the alcohol to better penetrate the cell walls of bacteria and viruses.
In contrast, the 99% concentration, often labeled as Anhydrous IPA, contains less than one percent water. This absence of water means it is preferred for technical applications, not disinfection. The high purity ensures that the alcohol evaporates almost instantly, leaving behind no moisture or residue. This rapid evaporation is mandatory for cleaning delicate circuitry, camera lenses, 3D printer beds, or as a solvent in chemical extractions.
Physical Retail Locations for High-Purity IPA
Locating 99% IPA in a physical store requires visiting specific departments in larger retail chains. Major drugstores and pharmacies sometimes carry 91% or 99% concentrations, though stock is frequently limited compared to the 70% variety. You should check both the first-aid aisle and the cleaning or solvent section, as labeling can vary.
Hardware stores are another reliable source for high-purity alcohol. Look in the paint thinners or solvents section, where it is often sold in larger containers, sometimes labeled as a cleaner or degreaser. Electronics supply stores, which cater to technicians and hobbyists, are highly likely to stock 99% IPA for cleaning circuit boards and components. It is advisable to call ahead to confirm availability, as the 99% concentration is not a standard retail item.
Online and Specialty Suppliers
For guaranteed availability or bulk quantities, purchasing 99% IPA from online and specialty suppliers is the best solution. Major e-commerce platforms offer a wide array of options, but buyers must carefully verify the seller’s credibility and the product’s stated concentration. Look for products labeled as “Anhydrous” or “ACS Grade,” which denote high water exclusion and quality control.
Specialized distributors catering to the chemical, laboratory, or electronics manufacturing industries stock the highest purity grades. These suppliers often sell in larger volumes, such as gallon jugs or multi-packs, making them economical for heavy users. Cosmetic and nail supply vendors also carry 99% IPA for use in preparing surfaces. Purchasing from these industry-specific sources ensures the product meets stringent quality specifications necessary for technical work.
Safe Handling and Storage
The 99% isopropyl alcohol is highly flammable and requires careful handling and storage. Its low flash point means its vapors can easily ignite when exposed to a spark, open flame, or high heat source. Always use the product in a well-ventilated area, such as outdoors or near an exhaust fan, to prevent the accumulation of flammable vapors.
Containers of 99% IPA must be stored tightly sealed and kept in a cool, dry place away from any ignition sources, including pilot lights and electrical equipment. Avoid contact with the eyes, as it can cause serious irritation, and seek medical attention if ingestion occurs. Static electricity can also generate a spark, so containers should be grounded when transferring large volumes to prevent accidental ignition.