Industrial hydrogen GB / T3634-1995 H2≥99.90% (excellent products) H2≥99.50% (first grade) H2≥99.0% (Qualified) pure hydrogen GB / T7445-1995 H2≥99.99% high purity GB / T7445-1995 H2 ≥99.999% ultra-high purity GB / T7445-1995 H2≥99.9999% Physical characteristics: Formula: H2 Boiling point: -252.77 ℃ (20.38K) Density: 0.09kg / m3 Molecular Weight: 2.016 production methods: electrolysis, pyrolysis, coal gas and other major performance: reducing agents, high flammability, liquid nitrogen temperature lower than the application of: hydrogen is a major industrial raw material, is the most important industrial and specialty gases, in the petrochemical industry, electronic industry, metallurgical industry, food processing, floating French glass, fine organic synthesis, aerospace and so has a wide range of applications. At the same time, hydrogen is an ideal secondary energy (secondary energy means must be such as solar and coal from the system from a primary energy source energy). Under normal circumstances, hydrogen can easily combine with oxygen. This feature makes it a natural reducing agent used in production to prevent oxidation. In the process and manufacturing electronic microchip manufacture of glass high-temperature processing, hydrogen is added in a nitrogen atmosphere to remove residual oxygen. In the petrochemical industry, the need hydrogenation desulfurization and hydrocracking through to refine crude oil. Another important use of hydrogen is margarine, cooking oil, shampoo, lubricants, detergents and other household products, hydrogenated fats. Due to the high hydrogen fuels, the aerospace industry uses liquid hydrogen as fuel. Hydrogen is mainly used in the following industries: oil refining / float glass // Electronic / food / chemical manufacturing / aerospace Packaging: hydrogen trailer / cylinders / cylinder storage and transport: hydrogen storage There are four ways to choose from, namely gaseous storage, liquid storage, metal hydride storage and transportation microspheres. Currently, only the first three practical applications, microspheres storage mode still under study. Safety and environmental protection: Hydrogen is a colorless, odorless and dangerous, toxic, flammable gas, and fluorine, chlorine, oxygen, carbon monoxide and air mixture explosion are, where a mixture of hydrogen and fluorine at low and the dark can be spontaneous explosion, and chlorine mixing ratio of 1: 1, in the light also may explode. Because hydrogen is colorless and odorless, the combustion flame is transparent, so its presence can not easily be found in the senses, hydrogen is added to the ethyl mercaptan, in many cases, in order to perceive the senses, and can also be paid to the color of the flame. Hydrogen although non-toxic, physiologically the human body is inert, but if the air in the hydrogen content increased, will lead to hypoxia asphyxia. Like all cryogenic liquids, direct contact liquid hydrogen will cause frostbite. Suddenly a large area of ??liquid hydrogen spillover and evaporation will cause environmental hypoxia, and may form an explosive mixture together with air, causing combustion explosion.