The HiQ portfolio offers more than 100 different pure gases such as HiQ Nitrogen 5.0 and HiQ Argon 6.0. Purity is commonly expressed as a two digit number. For example, Helium with a purity of 99.9996% would be described as HiQ Helium 5.6 with the 5 representing the number of nines, while the 6 represents the first digit following the nines.