Purity Rankings: What Are They and Why Are They Important?

nitrogen dioxide msds

All major gas manufacturers provide specialty pure gases in several grades, ranging from high purity (99.998% min. purity) to ultra-high purity (99.999% min. purity) to research grade (99.9999% min. purity). Many people seem to misunderstand the purpose of purity ranking, but they do serve a vital role in the specialty gases industry. Understanding the details about purity rankings can help you find the specialty gas suppliers that best meet your needs. Here are just a few things you should know about purity rankings.

High-purity grades of nitrogen can also be called Zero grade because they meet the official standards regarding hydrocarbons. Zero grade gases have less than .5 parts per million of total hydrocarbons that are required for Zero grade nitrogen.

“Besides hydrocarbons, nitrogen contains other impurities like oxygen, carbon dioxide, carbon monoxide and water. None of the high-purity grades contain oxygen greater than 0.5 parts per million, carbon dioxide or carbon monoxide greater than one part per million, or water greater than three parts per million,” writes Michael Parker on Sciencing.

The lower-purity grades of nitrogen comprise a maximum of 99.998% nitrogen. However, the number and type of contaminants present in these lower grade nitrogen gases are greatly variable. Low-purity can include names such as High Purity, Zero, Prepurified, Oxygen Free, Extra Dry, and Industrial.

High-purity grades are most typically used within the pharmaceutical industry. They serve as a shield gas for many medications, and they also protect medicine from reacting with surrounding oxygen and affecting moisture levels.

Oxygen Free nitrogen, on the other hand, is most often used to cover substances with a flame retardant material. Since combustion requires oxygen, the Oxygen Free nitrogen makes them less combustible, reducing the risk of explosions, fires, and other unsafe heat situations. These grades are also used for tire inflation as well as furnace heat treatment.

Ultimately, a report done by Grand View Research predicts that cost reduction, yield improvement and performance optimization are projected to drive the global the specialty gas market over a six-year timespan (2014-2020). Taking the time to inform yourself of what purity rankings mean is the key to making the best decisions regarding nitrogen dioxide msds and other calibration gases for your business. For more information about nitrogen dioxide msds, contact Mesa Gas.

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