Ultra-high purity gases are the only gases that we put into our BIP® cylinders; this combination produces gases that are up to 300 times purer than normal gas cylinders. By starting with ultra-pure gas and delivering it through our award winning BIP® technology we can guarantee the lowest levels of impurities available in the marketplace today.
BIP® gases have a minimum purity of 6.0; however, higher specification grades have been developed for more demanding applications. Also, for those using GC-ECD (Electron Capture Detector) technique, where low levels of halocarbons are demanded, Air Products has developed an ECD grade for both nitrogen and helium gases (<1 ppb).
The BIP® family of gases includes argon, helium, hydrogen and nitrogen. The below table shows the package options for each gas type and purity.
Argon (view size guide)
Hydrogen (view size guide)
Helium (view size guide)
Nitrogen (view size guide)
More about how gas purity is quoted
Gas purity can be expressed in terms of a purity grade, which describes the ‘number of nines’ in the percentage purity of the gas. A purity grade of 6.0, for example, corresponds to 99.9999% purity. The number after the decimal point corresponds to the digit following the last nine, so a purity grade of 4.6 corresponds to 99.996% purity.