There is often confusion over the difference between industrial gases (sometimes referred to as commodity gases or bulk gases) and specialty gases (sometimes referred to as cylinder gases).
Specialty gases represent rare or ultra-high purity gases and it includes all the minor gases which are used in specialized applications. Different types of specialty gases such as high purity gases, noble gases, hydrocarbon gases, halogen gases, and other specialty gases have unique properties and thus benefit many industries, including analytical, pharmaceutical, electronics, petrochemical, etc.