Specialty gases refer to binary or multi-component mixtures of pure gases, high-purity gases, or high-purity base gases, possessing specific purity, composition, or performance requirements, and applied in specific fields.
Definition: Specialty gases have strict requirements for purity, impurity content, stability, and other indicators. They are usually prepared through special processes (such as cryogenic distillation, adsorption, membrane separation, etc.) to meet the needs of precision manufacturing or scientific research.
Classification: Electronic gases: Used in the semiconductor, display panel, and other electronics industries, such as silane, high-purity ammonia, and sulfur hexafluoride, requiring extremely high purity and particle size.
High-purity gases: With a purity of 99.999% or higher, such as high-purity hydrogen and high-purity helium, used in laboratory analysis, laser technology, and other fields.
Standard gases: Gases mixed in specific proportions, used for instrument calibration or environmental monitoring, such as standard mixtures containing carbon monoxide and sulfur dioxide.