Specialty Gases

Product Introduction:

English name: Hydrogen

Chemical formula: H2

CAS number: 1333-74-0

Appearance: colorless and odorless gas

Molar mass: 2.0157g/mol

Melting point (℃): -259.2

Density: 0.07 (-252℃)

Boiling point: -252.8

Warning term: Dangerous.

Flash point: meaningless

GHS hazard classification: flammable gas, high-pressure gas, compressed gas,

Hazard description: extremely flammable gas, containing high-pressure gas, may explode when heated.

Properties:

High-purity hydrogen is a colorless and odorless flammable gas. The flammable limit in air is 4.0% to 75.0% (V). Autoignition temperature is 571.2℃. Relative density ds (0℃, air = 1) 0.06960. ρg 0.08342kg/m3 (21.1℃, 101.3kPa); liquid density 70.96kg/m3 (-252.8℃, 101.3kPa). Boiling point -252.8℃. Melting point -259.2℃. Hydrogen molecules are composed of two isomers, and the ratio of normal hydrogen to para hydrogen is 75:25 at room temperature. As the temperature decreases, the ratio of para hydrogen increases, accompanied by the release of conversion heat. The equilibrium composition at 20.4K is 0.2:99.8. Hydrogen is non-toxic, but cannot sustain life.

Scope of application:

Hydrogen is the main industrial raw material, as well as an important industrial gas and special gas

1. It has a wide range of applications in petrochemicals, electronics, metallurgy, food processing, float glass, fine organic synthesis, aerospace, etc.

2. Hydrogen is also an ideal secondary energy source (secondary energy refers to energy that must be produced from a primary energy source such as solar energy, coal, etc.).

3. In the high-temperature processing of glass manufacturing and the manufacture of electronic microchips, hydrogen is added to the nitrogen protective atmosphere to remove residual oxygen.

4. In the petrochemical industry, hydrogenation is required to refine crude oil through desulfurization and hydrocracking.

5. Another important use of hydrogen is the hydrogenation of fats in margarine, cooking oil, shampoo, lubricants, household cleaners and other products.

6. Due to the high fuel quality of hydrogen, the aerospace industry uses liquid hydrogen as fuel.

High-purity hydrogen is also used in nuclear research, bombardment particles of deuterium nuclear accelerators, tracers, raw materials for gas chromatography hydrogen flame testing, low-density sounding balloons, new high-energy fuels (driving rockets), smelting of metal tungsten, molybdenum, etc., as well as petroleum refining, float glass, electronics, food, drinking water, chemical production, aerospace, automotive industry and other industries

Technical parameters:

Purity	Impurity content (PPM)	Implementation standard	Packaging
99.00%	O₂≤4000，N₂≤6000，H₂O dew point -43℃	GB/T3643.1-2006	Steel cylinder, container, long tube trailer
99.99%	O₂+Ar≤5，N₂≤60，CO≤5，CO₂≤5，CH₄≤10，H₂O≤30	GB/T3634.2-2011
99.999%	O₂+Ar≤1，N₂≤5，CO≤1，CO₂≤1，CH₄≤1，H₂O≤3	GB/T3634.2-2011
99.9999%	O₂+Ar≤0.1，N₂≤0.1，CO≤0.1，CO₂≤0.1，H₂O≤0.5,THC≤0.1	GB/T16942-2009

Serial number	Name	Chemical formula	Purity (%)	Pressure (Mpa)	Filling volume (m3/kg)	Valve thread outlet
1	Hydrogen	H2	99.9	1.1	4.4	W21.8 reverse thread
2	High-purity hydrogen	H2	99.999	1.1	4.4	W21.8 reverse thread
3	High-purity hydrogen	H2	99.999	9.5	1	W21.8 reverse thread

Variety	Project		Indicator
			Superior product	First-class product	Second-class product
High-purity hydrogen	Hydrogen purity，10-2（｜/｜）≥		99.999	99.999	99.999
	Neon content，10-6（｜/｜）≤		/	/	/
	Helium content，10-6（｜/｜）≤		/	/	/
	Oxygen (argon) content，10-6（｜/｜）≤		0.5	1	3
	Nitrogen content，10-6（｜/｜）≤		1	1	6
	Carbon monoxide content，10-6（｜/｜）≤		0.1	0.2	0.5
	Carbon dioxide content，10-6（｜/｜）≤		0.1	0.2	0.5
	Methane content，10-6（｜/｜）≤		0.1	0.2	0.5
	Water content，10-6（｜/｜）≤		1	2	3

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