Structural formula：

English name: high purity hydrogen
CAS No.: 1333-74-0
Molecular formula: H₂
Molecular weight: 2.02
The physical and chemical properties: colorless, odorless, tasteless and non-toxic flammable gas; melting point: -259.2°C; boiling point: -252.8°C; relative density(water=1): 0.07(-252°C); relative vapor density(gas=1): 0.07; satured vapor pressure: 13.33KPa(-257.9°C); heat of combustion: -241.0KJ/moL; critical temperature: -240°C，
Technical indicators:
(1)appearance: colorless, odorless, tasteless and non-toxic flammable gas
(2)purity: ≥99.99%
Packing specification: bundle truck transport
Storage: Ventilated low temperature drying warehouse; Store separately from the oxidizer.
To use: Used in various processes of petroleum refining and petrochemical industry. In the chemical industry, it is used as raw material for synthetic ammonia, polyvinyl chloride, octanol, oil hardening, hydrogen peroxide and other products. Hydrogen and oxygen flame used for metal cutting and welding in the metallurgical industry, the production of non-ferrous metals such as tungsten, molybdenum and titanium, etc. High-purity Hydrogen is also used as reducing gas and protective gas in the processing. In the electronics industry, high-purity Hydrogen is used in the production of electronic materials, semiconductor materials and devices, integrated circuits and electrical vacuum devices. With the development of liquid hydrogen production, it is more and more widely used in aerospace and rocket industry.