Speciality gases are gases and mixtures having special uses in laboratories, in the pharmaceutical, electronic and food industries and other situations requiring highly calibrated mixtures.
Most speciality gases are produced on a one off basis often with tiny quantities of other gases added in the parts per million or parts per billion range.
Speciality gases are used to calibrate analysis equipment in the environmental monitoring industry. They are also used in laboratories, in food and pharmaceutical industries and in the electronics industry to accurately add a particular element or compound to a reaction.
Safety depends on the particular gas and details on any hazards associated with a particular gas should be checked in the relevant Safety Data sheet.